# System

"System" here refers to Energy Management System (EMS). There are two EMS types: Trene and Aelio. Multiple EMSs may exist in one C&I plant. You can manage the inverter remotely through EMS: mode settings, remote setting, demand control, zero export control, and external control.

# Work Mode

According to the status of connection to the grid, a device might be in grid-connected or grid-disconnected state. When it is grid-connected and online, you can set the work mode for it. Aelio system supports 6 work modes: Self-Use Mode, Feedin Priority Mode, Backup Mode, Manual Mode, Peak-shaving Mode, and TOU. Trene system only supports Self-Use Mode, Manual Mode, and TOU, but when a grid-connected photovoltaic inverter is integrated into the system, it also supports Feedin Priority Mode.

The following takes Aelio inverter as an example, to show you how to set the work mode.

# Self-Use Mode

Self-use mode is suitable for areas with high electricity consumption costs but low feed-in revenue. Its operation logic: The electricity generated by PV is preferentially used to meet the demands of C&I loads. After that, if there is still power left, it will be stored in the battery for backup first, and then sold to the grid when the battery SOC reaches the target value.

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  1. After entering a plant, tap the bottom tab System, and then select "Self Use" from Mode Settings.
  2. Set the min SOC, that is the least battery power amount when the battery discharge must stop.
  3. (Optional) Set to take power from the grid and tap Save. Then set the target SOC for charging.
  4. Set parameters for Charge&Discharge Period 1 based on your needs.
  5. (Optional) Enable Charge&Discharge Period 2. Specify start and end times for it. Finally, save all data.

# Feed-in Priority Mode

Feedin priority mode is suitable for areas with high feed-in revenue. Its operation logic: The electricity generated by PV is preferentially used to meet the demands of C&I loads. After that, if there is still power left, it will be sold to the grid to gain profits.

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  1. After entering a plant, tap the bottom tab System, and then select Feed-in Priority from Mode Settings.
  2. Set the min SOC, that is the least battery power amount when the battery discharge must stop. Set the target value for charging, that is charging will stop once it reaches the value.
  3. Set start and stop times for Charge&Discharge Period 1 based on your needs.
  4. (Optional) Enable Charge&Discharge Period 2. Specify start and end times for it. Finally, save all data.

# Backup Mode

Backup mode is suitable for areas where power failure happens frequently. People living here should store enough energy to deal with such situations.

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  1. After entering a plant, tap the bottom tab System, and then select Backup from Mode Settings.
  2. Set the min SOC, that is the least battery power amount when the battery discharge must stop. Set the target value for charging, that is charging will stop once it reaches the value.
  3. Set start and stop times for Charge&Discharge Period 1 based on your needs.
  4. (Optional) Enable Charge&Discharge Period 2. Specify start and end times for it. Finally, save all data.

# Manual Mode

Manual mode is generally used for emergency situations. It is recommended that it should by operated by professional maintenance and debugging personnel. It includes: Stop charging and discharging, Forced charging, and Forced discharging. This mode will automatically exit after running for 6h.

Method: Select Manual Mode, and then set as needed.

# Peak-shaving Mode

Peak-shaving mode is applicable to users in countries which adopts the peak-shaving method to adjust the electricity consumption intelligently.

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  1. After entering a plant, tap the bottom tab System, and then select Peak Shaving from Mode Settings.

  2. Set parameters for Discharge Period 1. Specifically,

    a. Set the shaving start time. By default, it is 7：00.

    b. Set the shaving end time. By default, it is 15：00.

    c. Set the peak limit value: When the amount of power consumed by loads reaches the value, the battery starts to discharge.

    d. (Optional) Set to take power from the grid. Set the maximum SOC for the inverter taking power from the grid. When reaching the SOC, the inverter stops taking power.

  3. Set parameters for Discharge Period 2. By default, the shaving start and end time are 19：00 and 23：00 respectively. The setting method is similar to that for Discharge Period 1.

  4. Set to take power from the grid, the charging power threshold, and the target battery SOC. This period starts after Discharge Period 2 but before Discharge Period 1. Set the reserved battery SOC, to ensure the remaining battery energy is not less than the value.

# TOU Mode

TOU (Time of Use) mode is a strategy for managing grid-side demands. In TOU mode, you can set different work status for different time periods in day according to changes in power demands and tariff of the grid.

To set the TOU mode, you need to create a template, create a strategy, and apply the strategy.

Step 1: Creating a template:

  1. Select Template from the tab bar. Tap mixureSecure to create a template.

  2. Enter the template and min. SOC. Divide one day (24h) into different time periods. The minimum interval is 0.5h. Set the work status (self-use, peak shaving, charging, discharging, and battery neither charging or discharging).

  3. Tap Confirm to complete template creation.

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Step 2: Creating a strategy:

  1. Select Strategy from the tab bar. Tap mixureSecure to create a strategy.

  2. Enter the strategy name, select the template already created, set the priority, set the start and end time, and cycle mode. For example, if selecting "weekly", you need to which days in a week to repeat.

  3. Tap Confirm to complete strategy creation.

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[Note] One priority level can be applied to different templates.

Step 3: Applying the strategy

Return to the mode setting page, select Strategy, to open the strategy you created before, and tap Apply.

After completing the operations above, tap Calendar in the tab bar, to check which days are in the TOU mode.

For more details about work mode, visit SolaX Products (opens new window) to view the corresponding inverter user manual.

# Remote Settings

To set up a device remotely, you need to enter the device SN and the corresponding password. Remote settings include user settings and advanced settings. The initial password for user settings is 0000. It is recommended that advanced settings should be set by an installer or agent and please get the initial password from them. Because parameter setting items vary with device models, the settings are not described herein. For more details about settings, refer to the corresponding device user manual on SolaX Products (opens new window).

# Demand Control

Demand control is a technology to manage grid-side demands. It is aimed at reducing the electricity bill by controlling the demands of loads.

Set as follows:

  1. Set the threshold for demand control, that is, the largest amount of electrical power taken from the grid.
  2. Turn Enable to be on.
  3. Tap Save.
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# Zero export control

In some places, it is regulated by the grid that electrical power cannot be transferred to the grid. Therefore, we need to set the export value to 0.

Set as follows:

  1. Select the control mode according to your actual situations.
  2. Set the limit value for power export, that is, the largest amount of electrical power fed to the grid.
  3. Turn Enable to be on.
  4. Tap Save.
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# External control

In some countries or regions, it is regulated that the grid perform remote scheduling on power by means of Ripple Control or DRM, so you need to complete the corresponding settings on the user side to comply to the requirements of the power grid. For details about setting, please visit SolaX Products (opens new window) for the corresponding inverter user manual.

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