User Manual
16
Off-Grid Mode
PV
Battery
Loads
Grid
Inverter
PV
Battery
Loads
Grid
Inverter
In the purely off-grid mode, power fromPV will supply the back-up loads first andthen charge the battery if there's
surpluspower.
When the power from PV isn’t enough, the battery will discharge to supply backup loads with PV.
Normally, the Back-Up switching time is less than 10ms. However, some external factors may cause the system to fail on
switching to Back-Up mode. Therefore, the conditions for using the Back-Up function smoothly are as follows for your
awareness.
1) Do not connect loads that are dependent on a stable energy supply for a reliable operation.
2) Do not connect loads with a total capacity more incredible than the maximum Backup capacity.
3) Do not connect the loads that may cause very high start-up current surges, such as non-frequency conversion air
conditioning, vacuum cleaner or half-wave loads such as hair dryer, heat gun, hammer drill.
4) Due to the battery's condition, battery current might be limited by some factors, including but not limited to the
temperature and weather.
The inverter will restart in case of overload protection. The time required for restarting will increase (5 min at most) if
overload protection repeats. Try to reduce Back-Up load power within maximum limitation or remove the loads which
may cause very high start-up current surges.
2.2.2 Back-up and off-grid output
