SolaX Power X3-Hybrid G4 Series - EPS (Off-Grid) Mode (Priority: Loads > Battery)

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Product Overview
2.7.6 EPS (off-grid) Mode (Priority: Loads > Battery)
During a power outage, the system will provide uninterrupted power supply to the EPS
(off-grid) loads using the power from PV and the battery. It is important to ensure that the
EPS (off-grid) loads should not exceed the maximum output power of the battery.
ChargingDischarging
Expected PV
power curve
Power
EPS (off-grid) Mode
Ideal: The emergency loads still can be
used when grid is off.
Battery
status
Battery
SOC
Discharging
7:00
Time Line
18:00
23:00
PV powers the load
PV and battery
power the load
Battery powers the load
Battery powers the load
PV and battery
power the load
Charge the battery
with excess PV energy
Load power curve
Figure 2-14 EPS (off-grid) mode
Table 2-9 Description of EPS (off-grid) mode
Battery SOC Inverter working status
Battery SOC
>Min SOC
(off-grid min
SOC)
PV is sufficient
(PV
→
load
→
battery)
• The PV prioritizes supplying power to the load, with any excess energy
being directed towards charging the battery.
PV is insufficient
(PV+battery
→
load)
• The PV prioritizes supplying power to the load. If the energy is not
enough, the battery will discharge power until the battery SOC
reaches Min SOC and then error of BatPowerLow will be reported.
Battery SOC
≤Min SOC
(off-grid min
SOC)
The inverter reports BatPowerLow. When there is PV, it will charge
the battery first. After charging to the set Min ESC SOC value, it will be
automatically recovered and enter EPS (off-grid) mode again.
Note:
Min SOC: Minimum SOC of the battery under off-grid conditions. 10% by default, range:
10%-100%.
Min ESC SOC: The minimum SOC required for re-entry EPS (off-grid) mode. 30% by
default, range: 15%-100%.