PV+ESS+Charger Solution User Manual
S:Smart Dongle Networking
S:Smart Dongle Networking
PV Power Preferred
- PV Power Preferred is displayed only when the PV+ESS system and charger are connected to the same plant.
- Surplus PV power includes the PV output power and the energy discharged from the ESS.
Feature Description
- Surplus PV power = PV power – Home load power – ESS charging power
- When the surplus PV power is greater than Surplus Power to Start Charging, and the sum of the surplus PV power and Max Charging Power from Grid is greater than or equal to the minimum charging power of the charger, the charger starts charging the vehicle.
- In the PV Power Preferred mode, after the charger starts charging, the actual charging power of the charger is related to the surplus PV power and the setting of Max Charging Power from Grid.
- When the surplus PV power is greater than Max Charging Power from Grid, the charger uses the surplus PV power to charge the vehicle.
- When Max Charging Power from Grid is greater than the surplus PV power, the charger charges the vehicle at Max Charging Power from Grid. The deficiency is supplemented by the power grid.
- When both the surplus PV power and Max Charging Power from Grid are less than the minimum charging power of the charger, and the sum of the two is greater than the minimum charging power, the charger charges the vehicle at the minimum charging power.
- When both the surplus PV power and Max Charging Power from Grid are less than the minimum charging power of the charger, and the sum of the two is less than the minimum charging power, the charger stops charging the vehicle.
- The minimum charging power of a single-phase charger is about 1.38 kW*. You are advised to set Max Charging Power from Grid of the single-phase charger to a value greater than 1.38 kW. Otherwise, charging is likely to be interrupted when the PV power is low.
Table 2-5 Example of single-phase charging power (Max Charging Power from Grid ≥ 1.38 kW)
Surplus PV Power (a)
Max Charging Power from Grid (b)
Actual Charging Power (a or b, Whichever Is Larger)
3
2
3 (surplus PV power)
1.5
2
1.5 (surplus PV power) + 0.5 (grid power)
0.5
2
0.5 (surplus PV power) + 1.5 (grid power)
0
2
2 (grid power)
Table 2-6 Example of single-phase charging power (Max Charging Power from Grid < 1.38 kW)Surplus PV Power (a)
Max Charging Power from Grid (b)
Actual Charging Power (a or b, Whichever Is Larger)
3
0–1.38
3 (surplus PV power)
1.5
0–1.38
1.5 (surplus PV power)
1.2
1.1
1.38 (When both a and b are less than 1.38 kW and the sum of a and b is greater than 1.38 kW, the charging power is 1.38 kW.)
0.5
0.6
0 (When both a and b are less than 1.38 kW and the sum of a and b is less than 1.38 kW, charging stops.)
0
0–1.38
0 (Charging stops.)
- The minimum charging power of a three-phase charger is about 4.14 kW*.
- To improve PV energy utilization rate, if a vehicle has both three-phase and single-phase charging capabilities, the three-phase charger can use the single-phase and three-phase switching function. When the charging power of the three-phase charger decreases to less than 4.14 kW, the charger automatically switches to single-phase charging.
- You are advised to set Max Charging Power from Grid of the three-phase charger to a value greater than 1.38 kW when Switch Between Single and Three Phases is enabled and to a value greater than 4.14 kW when Switch Between Single and Three Phases is disabled. Otherwise, charging is likely to be interrupted when the PV power is low.
Table 2-7 Example of three-phase charging power (Switch Between Single and Three Phases enabled)Surplus PV Power (a)
Max Charging Power from Grid (b)
Actual Charging Power (a or b, Whichever Is Larger)
5
4.2
5 (surplus PV power)
4.2
5
4.2 (surplus PV power) + 0.8 (grid power)
4
3
4 (When the larger value between a and b is less than 4.14 kW and greater than 1.38 kW, the charger automatically switches to single-phase charging.)
1
1
1.38 (When both a and b are less than 1.38 kW and the sum of a and b is greater than 1.38 kW, the charger automatically switches to single-phase charging at 1.38 kW.)
0.5
0.6
0 (When both a and b are less than 1.38 kW and the sum of a and b is less than 1.38 kW, charging stops.)
Table 2-8 Example of three-phase charging power (Switch Between Single and Three Phases disabled)Surplus PV Power (a)
Max Charging Power from Grid (b)
Actual Charging Power (a or b, Whichever Is Larger)
5
4.2
5 (surplus PV power)
4.2
5
4.2 (surplus PV power) + 0.8 (grid power)
4
4
4.14 (When both a and b are less than 4.14 kW and the sum of a and b is greater than 4.14 kW, the charging power is 4.14 kW.)
2
2
0 (When both a and b are less than 4.14 kW and the sum of a and b is less than 4.14 kW, charging stops.)
- Note*: The minimum operating current of a charger is 6 A. When the voltage is 230 V, the charging power of a single-phase charger is 1.38 kW, and that of a three-phase charger is 4.14 kW.
- The following uses a single-phase charger as an example: The default values of Surplus Power to Start Charging and Max Charging Power from Grid are 1.4 kW. If the voltage is high, increase the values based on the actual voltage. Otherwise, if the actual voltage is greater than 230 V, the operating current of the charger is less than 6 A at the default values and charging will stop.
Setting PV Power Parameters
- Max Charging Power from Grid: maximum power that the charger can draw from the power grid during charging in PV power mode.
- Surplus Power to Start Charging: When the PV feed-in power is greater than this set value, the charger starts to charge the vehicle.
- Switch Between Single and Three Phases: When the charge power of a three-phase charger is low, the charger can switch to single-phase charging. You are advised to enable this function in PV scenarios to increase the PV energy utilization rate.
Enabling PV Power Preferred (Charge Now)
Log in to the FusionSolar app as an owner, tap the charger icon on the home screen, and enable PV Power Preferred on the Settings screen. A green icon is displayed on Charge Now.
Enabling PV Power Preferred (Scheduled Charging)
Log in to the FusionSolar app as an owner, tap the charger icon on the home screen, tap , add a scheduled time period, and enable the PV Power Preferred mode in the period.
The owner can set Maximum Charge Power for each scheduled charging session.