Control Strategies

Basic Settings

If the start mode is set to “Passive Mode”, the device is controlled by the local EMS. After parameter configuration is completed, the system will run automatically according to the settings without manual intervention.

If the start mode is set to “Third-Party Dispatch Mode”, after the device is connected to and receives dispatch from a third-party platform, the system will be centrally controlled by the third party. Control strategies will retain only parameters related to tariff settings, reserved backup power, demand control, anti-feedin, transformer protection, off-grid operation, and on/off-grid start-up to avoid conflicts with third-party dispatch. Local mode: In local mode, users can set power parameters via the cloud platform page or the device's local Web page. This mode is mainly used during device installation and commissioning for quick on-site configuration and verification. In remote mode, users establish a connection through the EMS physical communication interface and issue control commands via communication to achieve remote control and dispatch of the device.

Page field business explanations:

Field Name	Value Range	Business
Start Mode	Dropdown options: Passive Mode, Third-Party Dispatch Mode	--
Local/Remote	Dropdown options: Local, Remote	--
Control Mode when Remote Control Fails	Dropdown options: Maintain the Current Value, Zero Power Output	--
Dispatch Protocol	Dropdown options: MODBUS-TCP, IEC104, SunSpec	--
Active Setpoint (MW)	Value range: -99999.9999~99999.9999	--
Active Control Deadband (kW)	Value range: 0~99999.9	--
Reactive Setpoint (Mvar)	Value range: -99999.9999~99999.9999	--
Reactive Control Deadband (Kvar)	Value range: 0~99999.9	--
AC Power Source Type	Dropdown options: AC_GRID, AC_GENERATOR	--
PV Couple Mode	Dropdown options: AC, DC, Hybrid	--
Off-grid Power Restore SOC (%)	Value range: 5-100	--
Off-grid Power Cut-off SOC (%)	Value range: 5-100	--
AC Side PV Installed Power (kW)	Value range: 0-99999.9	--
DC Side PV Installed Power (kW)	Value range: 0-99999.9	--
PV INV install Location	Dropdown options: Do Not Install, Grid Side, STS Load Side	--

Electricity Tariff Settings

Supports setting tariffs by different months and times.

Page field business explanations:

Field Name	Value Range	Data Precision	Business
Demand Electricity Tariff (CNY/kW·month)	Value range: 0~99999.999	Three decimal places	If the device is in China, the page displays the "Demand Electricity Tariff" setting field
Time Type	Dropdown options: High-peak, Peak, Shoulder, Valley, Deep-valley	--	--
Electricity Tariff	--	Three decimal places	--

Three-Phase Imbalance Control

Function Introduction

Three-phase imbalance control is used when three-phase loads are unevenly distributed. According to set single-phase current or power limits, it adjusts the energy storage PCS per phase to keep the three-phase current or power at the grid gateway (service entrance) balanced and within limits as much as possible, ensuring stable system operation. This function can only operate during charging or discharging (not both).

After enabling three-phase imbalance control, the system will perform per-phase adjustments to PCS based on real-time operation without affecting normal power use and production.

Function effects:

1. Real-time monitoring of three-phase current and power status;

2. Control according to set single-phase current or power limits to relieve single-phase overload issues;

This function helps customers solve the following problems:

1. Reduce the risk of single-phase overloads and anomalies;

2. Improve three-phase imbalance and ensure power safety;

3. System automatically adjusts without manual intervention;

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The page content for three-phase imbalance varies with device models; this page field description summarizes all fields across different versions of the three-phase imbalance page.

Page field business explanations:

Field Name	Value Range	Data Precision	Business
Parameter Settings	Dropdown options: Single-phase Current, Single-phase Power, Gateway Total Power	--	Supports parameter settings in three dimensions: single-phase current, single-phase power, and gateway total power.
Phase A Current (A)	Value range: 0-65535	Integer	Used to limit the maximum current for Phase A at the grid gateway. Please set according to the rated current of on-site breakers or switches. The entered value must not exceed the breaker’s allowed single-phase maximum to avoid overcurrent and protective actions.
Phase B Current (A)	Value range: 0-65535	Integer	Used to limit the maximum current for Phase B at the grid gateway. Please set according to the rated current of on-site breakers or switches. The entered value must not exceed the breaker’s allowed single-phase maximum to avoid overcurrent and protective actions.
Phase C Current (A)	Value range: 0-65535	Integer	Used to limit the maximum current for Phase C at the grid gateway. Please set according to the rated current of on-site breakers or switches. The entered value must not exceed the breaker’s allowed single-phase maximum to avoid overcurrent and protective actions.
Phase A Active Power (kW)	Value range: 0-99999.9	One decimal place	Used to limit the allowed maximum active power for Phase A at the grid gateway. Set according to the carry capacity of on-site breakers or switches. Do not enter a power value exceeding the single-phase maximum to avoid protective actions due to overlimit.
Phase B Active Power (kW)	Value range: 0-99999.9	One decimal place	Used to limit the allowed maximum active power for Phase B at the grid gateway. Set according to the carry capacity of on-site breakers or switches. Do not enter a power value exceeding the single-phase maximum to avoid protective actions due to overlimit.
Phase C Active Power (kW)	Value range: 0-99999.9	One decimal place	Used to limit the allowed maximum active power for Phase C at the grid gateway. Set according to the carry capacity of on-site breakers or switches. Do not enter a power value exceeding the single-phase maximum to avoid protective actions due to overlimit.
Gateway Total Power (kW)	Value range: 0-99999.9	One decimal place	Used to limit the allowed maximum total active power at the grid gateway. Ensure the entered value does not exceed the gateway breaker’s total power limit to guarantee safe operation.
Single-phase Current (A)	Value range: 0-65535	Integer	--

Transformer Protection

Function Introduction

Transformer protection is used at sites with large load fluctuations or multiple power sources (such as storage and PV). It automatically adjusts storage charge/discharge power to prevent power at the grid gateway (service entrance) from exceeding transformer capacity, reducing transformer overload risk. After enabling transformer protection, the system will automatically adjust storage charge/discharge power based on real-time operation without affecting normal use and production. This function can also be used in scenarios without a transformer at the grid gateway but with a power throughput limit requirement.

Function effects:

1. When load suddenly increases, automatically reduce storage charging power or switch to discharging to relieve transformer stress;

2. When storage is discharging at high power and stacked with other power sources, automatically limit storage discharging power;

3. Ensure the power at the grid gateway (service entry) stays below the transformer’s safe capacity;

This function helps customers solve the following problems:

1. Reduce transformer overload and trip risk;

2. Ensure stable station operation;

3. System automatically adjusts without manual intervention;

Page field business explanations:

Field Name	Value Range	Data Precision	Business
Protection Capacity (kW)	Value range: 0~99999.9	One decimal place	Set the transformer's rated capacity
Protection Coefficient (%)	Value range: 0~100	Integer	Actual storage system control: transformer maximum throughput = transformer rated capacity * protection coefficient

Demand Control

Function Introduction

During electricity usage, the grid charges based on the "maximum electric power (demand)". If power at any moment suddenly exceeds the maximum demand, it may cause a significant increase in the monthly electric bill.

The demand control function helps you automatically manage power peaks and avoid exceeding maximum demand. The system monitors the power at the station-grid connection (gateway/service entrance) meter in real time like a "power monitor", 24/7.

When the system detects that current power approaches or exceeds your preset "Maximum Allowable Demand", the system will automatically take measures:

1. Prioritize using storage battery discharge to reduce grid power draw;

2. Increase PV output where possible to use more self-generated power;

These methods keep power at the grid gateway (service entrance) within the set range to avoid additional demand charges caused by instantaneous high power.

Function effects:

1. No frequent manual parameter adjustments required;

2. The system automatically adapts the control limit based on actual power usage;

3. Continuously optimizes energy costs while ensuring normal production;

This function helps customers solve the following problems:

1. Prevents sudden power spikes and costly demand overages;

2. Makes fuller use of storage and PV to reduce purchased electricity;

3. This function can also achieve peak shaving effects;

4. Fully automatic control without manual monitoring;

Page field business explanations:

Field Name	Value Range	Data Precision	Business
Mode Selection	Dropdown options: Demand Tracking, Contract Demand	--	Selecting "Contract Demand" displays "Maximum Allowable Demand (kW)"; selecting "Demand Tracking" displays "Actual Demand (kW)";
Maximum Allowable Demand (kW)	Value range: 0~99999.9	One decimal place	Used to set the upper limit for grid power draw. When the meter at the station-grid connection (gateway/service entrance) detects real-time power above this value, the system will automatically discharge to avoid demand overage.
Actual Demand (kW)	--	--	In some enterprises real-time demand settlement is used. After enabling demand tracking, the system automatically reads the "historical maximum demand" from the gateway meter and uses it as the current control reference.

Anti-feed-in

Function Introduction

If PV generation plus storage discharge exceeds on-site load demand, excess power will flow back to the grid (feed-in). If feed-in power exceeds local limits, this may result in grid compliance violations, fines or uncertain revenues. The anti-feed-in function helps automatically prevent this.

The system monitors power at the station-grid connection (gateway/service entrance) to determine if there is a tendency to feed power back to the grid. When it detects PV generation + storage discharge > on-site load (i.e., imminent or occurring feed-in), the system will automatically adjust based on feed-in settings: reduce storage discharge power or switch storage to charging, and if necessary limit PV power.

Function effects:

1. Automatically prevent excess power from being sent to the grid to meet local grid requirements and avoid penalties or compliance risk from over-feed-in;

2. By these adjustments, the station's generation will just meet site demand without sending surplus to the grid;

This function helps customers solve the following problems:

1. Prevent reverse feeding to the grid and avoid penalties or operational risks from feed-in;

2. Setting a positive maximum feed-in power can enable valley-filling effects;

3. Fully automatic control without manual monitoring;

Page field business explanations:

Field Name	Value Range	Data Precision	Business
Maximum Feed-in Power Setting	Dropdown options: Maximum Feed-in Power, Maximum Feed-in Power Coefficient	--	Selecting "Maximum Feed-in Power (kW)" shows "Maximum Feed-in Power (kW)"; selecting "Maximum Feed-in Power Coefficient" shows the coefficient option.
Maximum Feed-in Power (kW)	Value range: -99999.9~99999.9	One decimal place	Enter a positive value (common in "0 feed-in" scenarios): if on-site requirements forbid feeding to the grid, set the maximum feed-in power to a positive value. EMS will control power bought from the grid to equal this set value to avoid short-term feed-in caused by sudden load drop. Enter a negative value (used when feed-in is allowed): if on-site feed-in is allowed, set maximum feed-in power as a negative value. EMS will control feed-in to the grid not to exceed the set absolute value.
Maximum Feed-in Power Coefficient (%)	Value range: 0~100	Integer	Maximum feed-in power = PV installed power * this coefficient. When detected actual feed-in power exceeds the maximum feed-in power, the system will automatically start anti-feedin control to prevent over-limit feed-in.

Reserved Backup Power

Function Introduction

In scenarios with possible power outages, you can reserve part of the battery energy as emergency backup for devices on the backup port. During normal operation and discharge, the system will ensure battery energy never falls below the configured "UPS Reserve SOC" to avoid using up the emergency power. When the system detects battery SOC below the reserved backup SOC, it will automatically start recharging to top up the battery. Recharge power will follow the configured backup power on the page to ensure safety without affecting other power needs.

Function effects:

1. Reserve emergency energy in the battery in advance to ensure important loads connected to the backup port remain powered during an outage;

2. The system automatically limits discharge during normal operation so battery SOC does not fall below the reserved backup value, and automatically recharges when needed;

This function helps customers solve the following problems:

1. Ensure power availability during outages to keep devices on the backup port running;

2. Fully automatic control without manual monitoring;

Page field business explanations:

Field Name	Value Range	Data Precision	Business
UPS Reserve SOC (%)	Value range: 0-100	Integer	When the system detects battery SOC below this value, depending on the storage system state, it will intelligently start recharging and stop charging when the battery reaches this SOC.
Backup Power	Value range: 0~99999.9	One decimal place	Devices will charge the battery using this power setting.

Power Factor Control

Function Introduction

Used to automatically adjust the station's reactive power output to help maintain a reasonable power factor, reducing penalties for poor power factor. Suitable for sites with large load fluctuations and risk of power factor adjustment fines. Once enabled, the system will automatically adjust reactive power based on station operation without affecting normal use and production.

Function effects:

1. Real-time monitoring of the station power factor;

2. Automatic reactive compensation adjustments;

3. Keep the power factor stable within acceptable range;

4. Reduce or avoid penalties for power factor adjustments;

This function helps customers solve the following problems:

1. More stable electricity cost structure when power factor is compliant;

2. System runs automatically without manual intervention;

Page field business explanations:

Field Name	Value Range	Data Precision	Business
Grid-connected Power Factor Target Value (cos)	Value range: -1.00~1.00	Two decimal places	Used to set the desired power factor at the grid connection point. The system will automatically adjust storage reactive power to approach this target. Values closer to 1 indicate less reactive power and more reasonable consumption, better meeting grid requirements.

Auxiliary Control

SOC Calibration

Function Introduction

SOC calibration is a controlled charging process that lets the system re-confirm the battery's actual energy so that displayed SOC is more accurate. After calibration, the system's assessment of battery charge will be closer to reality, providing reliable basis for subsequent charge/discharge control and strategies.

Function effects:

1. Correct SOC deviation to avoid cases of "shown as having charge but actually empty" or "shown empty but actually has charge";

2. Execute charge/discharge, backup and anti-feed-in strategies based on real energy, reducing false trigger of protections or strategy anomalies;

3. Help customers accurately judge remaining usable energy, improving overall stability and predictability of the storage system;

This function helps customers solve the following problems:

1. SOC display is more accurate and control strategies are more reliable;

2. Available energy assessment is more realistic, reducing false protection triggers or strategy anomalies;

Page field business explanations:

Field Name	Value Range	Data Precision	Business
SOC Calibration Power (kW)	Value range: 0-6553.5	One decimal place	The system will calibrate the battery by charging at this power
SOC Manual Calibration	Dropdown options: Off, On	--	When "Manual Calibration" is enabled, the system will immediately perform battery SOC calibration
SOC Automatic Calibration	--	--	When "Automatic Calibration" is enabled, the system will automatically perform charging calibration when conditions are met

Undervoltage Forced Charging

Function Introduction

Undervoltage forced charging is a battery self-protection mechanism used when the battery is unexpectedly deeply discharged or operated at low SOC for a long time. When battery voltage is too low, the system will automatically start forced charging to restore the battery to a safe voltage range.

Function effects:

1. Automatically force charging when battery energy is too low to prevent damage from undervoltage and ensure system safety;

2. Quickly bring battery voltage back to safe range to reduce aging and performance degradation from prolonged low-energy operation;

This function helps customers solve the following problems:

1. Prevent battery damage due to undervoltage and improve system safety;

2. Reduce the risk of accelerated battery life degradation;

Page field business explanations:

Field Name	Value Range	Data Precision	Business
Undervoltage Forced Charge Power (kW)	--	Three decimal places	The system will automatically perform forced charging at the set power

Dynamic Tariff Dispatch (Beta)

The dynamic tariff dispatch feature based on EPEX Day-ahead Spot Price is currently open only in some regions (Netherlands, Germany, Poland, Belgium, etc.) and is in grayscale/beta testing. If you want to enable it, contact your installer or local AlphaESS service team.

Function Introduction

Dynamic tariff dispatch automatically obtains market electricity prices and controls storage charge/discharge timing to match device operation with price fluctuations, helping users use storage and electricity more efficiently.

This function removes the need for manual daily price checking or strategy adjustments; the system will automatically dispatch based on price changes.

Function effects:

1. Dynamic tariff dispatch will automatically adjust execution periods according to actual daily prices;

2. By setting coefficients and additions, users can make the system-calculated price closer to the real settlement price;

3. Improve storage utilization and optimize electricity costs;

This function helps customers solve the following problems:

1. By presetting high/low price thresholds, the system will automatically charge/discharge as planned to avoid manual judgment and misoperation;

2. Reduce repetitive operations;

Detailed Function Description

Price Data and Calculation Rules

Required fields:

• Epex spot coefficient (default 1, keep four decimal places)

• Price addition (default 0, keep three decimal places)

Price displayed on the chart = Epex price × Epex spot coefficient + price addition (the page shows the calculated "Total Price").

Where:

EPEX PriceMarket price from the electricity exchange

CoefficientUsed to match actual settlement proportion

AdditionCan be used to add fixed costs (such as service fees, additional costs, etc.)

You can set the coefficient and addition according to your actual electricity bill composition so the system-calculated price better matches real settlement. When viewing a historical date: the day's historical price is calculated and saved using the last coefficient and addition set that day.

Threshold Settings (how to divide high/low price)

The system automatically tiers the day's prices using percentile thresholds to determine charge/discharge strategy periods.

Division rules are as follows:

When a period's price is lower than the "Low Price Threshold Percentile" it is judged as a low-price period;

When a period's price is higher than the "High Price Threshold Percentile" it is judged as a high-price period;

Periods between the two thresholds are judged as regular-price periods.

Here, "percentile" indicates the relative position of that period's price within the day's price sequence rather than a fixed price value. By adjusting low/high price percentile thresholds, the system dynamically divides high and low price intervals based on the day's overall price distribution.

Default low price threshold is 30% and high price threshold is 70%, with step 1%.

You can adjust percentiles using +/- buttons or by dragging the slider. While dragging, a small bubble above the slider shows the current percentile and corresponding total price data. After setting thresholds, a green (low price line) and a red (high price line) will appear on the chart to mark the intervals.

Price Chart

Mouse hover tooltip:

• If there is a charge/discharge operation at that time: it will show the time, charge/discharge type, power (5-minute granularity), and price.

• If there is no charge/discharge operation at that time: it will show only time and price.

Charging is shown in green on the chart, discharging is shown in yellow.

You can select historical dates to view past prices; around 12:00 noon Netherlands time you can view next day's price data.

Strategy Settings

Estimated daily profit = discharged energy × discharge price − charged energy × charge price. This result is for reference when setting high/low price thresholds.

Strategy running logic (how devices charge/discharge under high/regular/low prices)The system divides the day into three price intervals: high / regular / low. Each interval can have separate charge/discharge strategies (for example allow discharge/disable discharge, allow charge/disable charge, power limits, etc.).

Handling PV during charging:

• Users can choose "Disconnect PV" or "Do Not Disconnect PV":

  • Choose "Yes" (Disconnect PV): PV will not participate during charging; storage will only charge from the grid (or other sources).

  • Choose "No" (Do Not Disconnect PV): PV supplies as usual during charging, PV will supply load first and remaining energy will go to storage; if PV is insufficient, storage will supplement from the grid.

• Note: this setting only affects whether PV is allowed to participate during "charging periods" and does not change PV behavior outside charging periods.

During discharging:

• Storage power is prioritized to supply loads and any surplus may be fed to the grid (if the system is configured to allow feed-in).

Within the "effective execution time range of dynamic tariff":

• After discharge completes, the device enters a "discharge-prohibited" state (no more discharging during this rule period), while PV feeds to the grid at maximum possible power (try to sell as much solar as possible).

• After charging completes, the device enters a "charge-prohibited" state, and PV still feeds at maximum power.

Outside the dynamic tariff time range: devices continue to follow previously effective charge/discharge logic that meets conditions (for example time-based strategies).

Before using this feature (EPEX-based dynamic tariff dispatch), please read the following statements carefully:

Applicability and User Responsibilities

Before using dynamic tariff dispatch, users must confirm they meet the following prerequisites:

• Have an effective dynamic tariff contract with a power retailer or grid operator (e.g., spot price, day-ahead, etc.);

• Have obtained local regulatory or grid operator permissions for storage system discharge and grid connection as required;

• Have confirmed that the region permits storage systems to participate in price response or feed-in operations.

These conditions vary by country, region and grid operator. Alpha ESS does not assume responsibility to verify whether users meet these conditions.

Feature Nature and Risk Assumption

This feature is currently experimental (Beta). The system computes and executes charge/discharge strategies automatically based on price data and preset algorithms. AlphaESS cannot assume responsibility for:

• Dispatch deviations caused by delays, interruptions, or errors in price data sources;

• Increased electricity costs, lost revenue, or other economic losses resulting from strategy execution;

• Adverse outcomes due to external factors such as grid policy changes or tariff structure adjustments.

By choosing to enable this feature, the user acknowledges understanding and assumes all associated risks.

Operational Errors and Status Monitoring

Actual charge/discharge behavior may deviate from planned behavior due to price forecast accuracy, network communication delay, battery state (SOC/SOH), load fluctuations, etc. It is recommended that users:

• Regularly check device operating status and dispatch execution records;

• Pay attention to abnormal alarms and handle them promptly;

• Maintain manual monitoring during the initial testing phase of the feature.

AlphaESS cannot guarantee perfect execution of dispatch plans.

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AlphaESS reserves the right to modify, suspend, or terminate this experimental feature at any time and will notify users via the App or official channels.

Time-of-day Strategy

Function Introduction

The time-of-day strategy is a pre-set charge/discharge schedule suitable for sites with clear time-based tariffs or usage patterns, or where planning storage behavior in advance is needed. It specifies how the storage system operates in different time periods. With the time-of-day strategy, the system automatically executes charge or discharge at the set times without manual real-time intervention.

After the time-of-day strategy takes effect, the system will automatically execute the corresponding modes at the set times. Modes inside and outside the time periods can be set separately and will not affect other protections and control strategies.

Function effects:

1. Plan storage charge/discharge behavior in advance for different periods;

2. Automatically switch operating modes based on time;

3. Improve storage utilization and optimize electricity costs;

This function helps customers solve the following problems:

1. By presetting time periods, the system will automatically charge/discharge on schedule to avoid manual judgment and misoperation;

2. Automatically charge in low-price periods and discharge in high-price periods to reduce electricity costs and increase storage profits;

3. Time-of-day strategy runs automatically and continuously without daily manual adjustments, reducing O&M workload and improving stability;

Note: displayed content on the time-of-day strategy page varies by device model and software version. This field explanation summarizes all fields across different versions of the time-of-day strategy page.

Page field business explanations:

Field Name	Value Range	Data Precision	Business
Allow discharge when demand protection is triggered	Dropdown options: Allow, Forbid	--	When grid gateway power triggers demand protection, whether to allow storage battery discharge to share the load. When enabled, the battery may discharge to reduce power; when disabled, the battery will not discharge even if demand protection is triggered.
Allow charging when anti-feed-in protection is triggered	Dropdown options: Allow, Forbid	--	In self-consumption mode, when anti-feed-in protection is triggered (PV > load), whether to allow storage battery charging. When enabled, the battery can charge to absorb surplus energy and prevent feeding to the grid; when disabled, the battery will not charge when anti-feed-in protection is triggered.
Self-Consumption Reserved SOC (%)	Value range: 5-100	Integer	Used to set the minimum reserved SOC in self-consumption mode. When storage SOC is below this value, the system will prioritize preserving energy and stop further discharging.
Peak Shaving Upper Limit (kW)	Value range: 0~99999.9	One decimal place	When grid draw exceeds the peak shaving upper limit, storage discharge is triggered to reduce grid power draw. Only effective in peak shaving & valley filling mode.
Valley Filling Lower Limit (kW)	Value range: 0~99999.9	One decimal place	When grid draw is below the valley filling lower limit, storage charging is triggered to increase grid draw. Only effective in peak shaving & valley filling mode.
Hysteresis Adjustment (kW)	Value range: 0~99999.9	One decimal place	Acts as buffer for peak shaving upper and valley filling lower power ranges. Default: 0. Only effective in peak shaving & valley filling mode.
Peak Shaving Discharge Cut-off SOC	Value range: 5-100	Integer	Sets the minimum SOC allowed during peak shaving discharge. Only effective in peak shaving & valley filling mode.
Power Limit Support Cut-off SOC	Value range: 5-100	Integer	Sets the minimum SOC limit for storage providing power support under power limiting scenarios. Only effective in power limit support mode.
Meter Power Regulation Offset	Value range: -99999.9~99999.9	One decimal place	Used to set meter power control. Only effective in power limit support mode.
Grid Charging Power Limit (kW)	Value range: 0-99999.9	One decimal place	Limits the maximum power from the grid to charge the battery; only effective in Fixed Power Charging mode.
Charging Power (kW)	Value range: 0~99999.9	One decimal place	The power used by the device when charging the battery;
Charge Cut-off SOC (%)	Value range: 5-100	Integer	The battery will automatically stop charging when it reaches this SOC;
Discharge Power (kW)	Value range: 0~99999.9	One decimal place	The power used by the device when discharging the battery;
Discharge Cut-off SOC (%)	Value range: 5-100	Integer	The battery will automatically stop discharging when it reaches this SOC;

Off-grid Operation

PV-storage-diesel cooperation

Function Introduction

In off-grid scenarios, PV, battery and diesel generator automatically coordinate power supply. Based on battery level or time, the system automatically controls diesel generator start/stop and charges the battery appropriately to ensure stable and fuel-efficient off-grid power.

Function effects:

1. PV, battery and diesel generator automatically collaborate without the grid to ensure continuous and stable power;

2. The system automatically starts/stops the diesel generator based on battery level or time to avoid ineffective running and reduce fuel consumption and maintenance costs;

3. Make full use of PV and battery to reduce dependence on the diesel generator, making off-grid power greener and more economical;

This function helps customers solve the following problems:

1. Provide continuous stable power off-grid;

2. Reduce unnecessary diesel generator operation and lower fuel usage;

3. Prioritize PV and battery for better economics;

Page field business explanations:

Field Name	Value Range	Data Precision	Business
Diesel Generator Rated Power (kW)	Value range: 0-6553.5	One decimal place	Used to set the diesel generator's maximum output power
Diesel Generator Available Power Percentage (%)			Diesel generator available generation power = diesel generator rated power * diesel generator available power percentage
Control Mode	Dropdown options: SOC Mode, Time Period Mode, Manual Mode		SOC Mode: start the diesel generator when battery SOC is below the start SOC and stop it when SOC is above the stop SOC. Time Period Mode: set a Start Time and Stop Time; the diesel generator runs during that period and stops outside it. Manual Mode: manually start/stop the diesel generator; suitable for commissioning or special conditions
Operating Range			Start the diesel generator when the energy storage SOC is below the minimum of this range, and cut off the diesel generator when it is above the maximum of this range
Power Mode	Dropdown options: Battery Charging, Diesel Generator Power Generation		Used to select how the energy storage system operates when off-grid or in PV-storage-diesel generator cooperative mode: Battery Charging: Charge the load first according to the diesel generator available percentage, then charge the battery at fixed power, and the fixed charging power for the battery + load power <= diesel generator available generation power (diesel generator available generation power = diesel generator rated powerDiesel generator available power percentage). Diesel Generator Power Generation: The diesel generator prioritizes supplying the load, and the remaining power is entirely used to charge the battery, and the battery charging power + load power = diesel generator available generation power (diesel generator available generation power = diesel generator rated powerDiesel generator available power percentage).
Battery Charging Power (kW)			Set the power level of the energy storage battery during charging

Load Classification

Function Introduction

The load classification control function prioritizes protecting important loads based on battery SOC. When energy is insufficient, general loads are disconnected first, then important loads; when energy recovers, power is restored in sequence. Important loads are disconnected last and restored first.

Numeric relationship: General load recovery SOC > (Important load recovery SOC / General load cut-off SOC) > Important load cut-off SOC;

Function effects:

1. By allocating power according to priority, extend power supply time for critical loads during tight energy conditions and improve overall system endurance;

2. Automatically switch and tier loads to prevent production or equipment risks caused by a one-time power cut, without manual operation throughout the process;

This function helps customers solve the following problems:

1. Critical loads remain powered;

2. More durable when energy is insufficient;

3. Avoid sudden blackout of the entire station;

4. Fully automatic control, no manual load shedding required;

Page field business explanations:

Field Name	Value Range	Data Precision	Business
General Load Cut-off SOC (%)	Value range: 5-100	Integer	When the battery current SOC equals the SOC value set here, the general loads connected to the energy storage will be disconnected.
General Load Recovery SOC (%)	Value range: 5-100	Integer	When the battery current SOC equals the SOC value set here, the general loads connected to the energy storage will be restored.
Important Load Cut-off SOC (%)	Value range: 5-100	Integer	When the battery current SOC equals the SOC value set here, the important loads connected to the energy storage will be disconnected.
Important Load Recovery SOC (%)	Value range: 5-100	Integer	When the battery current SOC equals the SOC value set here, the important loads connected to the energy storage will be restored.