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Appendix
②
Grid off
In this case, the hybrid inverter will simulate the grid so as to make the on-grid inverter can
still work. Hybrid and on-grid inverter will power the EPS loads together. If there is surplus
energy, it will charge the battery.
EPS loads
On-grid inverter
Common loads
Meter
Grid
PV
X-
CLOUD
DC
AC
COM
Meter
PV
Figure 14-15 Power flowing when grid off
Notice for micro-grid application
• Any brand of on-grid inverter that supports "frequency adaptation".
• On-grid inverter output power≤Max hybrid inverter EPS output power.
• On-grid inverter output power≤Max battery charging power.
NOTICE!
• Since X3-ULTRA series inverter is unable to control the output power of on-grid
inverter in grid connection mode, therefore X3-ULTRA series inverter can not achieve
zero export when loads power + battery charging power < on-grid inverter output
power.
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