Growatt 10000HY, Installation & Operation Manual

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Off-Grid (II)

PV energy supply priority setting: 

PV power will charge battery first. After battery is fully charged, if there is remaining 
PV  power  left,  it  will  provide  power  to  the  load.  Feed-in  to  the  grid  is  not  allowed 
under this mode. At the same time, the grid relay is connected in Inverter mode. That 
means the transfer time from inverter mode to battery mode will be less than 15ms. 
Besides,  it  will  avoid  overload  fault  because  grid  can  supply  load  when  connected 
load is over 10KW.

Battery charging source: 

1. PV or Grid: If there is remaining PV power after supporting the loads, it will charge 
battery first. Only until PV power is not available, grid will charge battery.  

2.

PV only: It is only allow PV power to charge battery. 

3. None: It is not allowed to charge battery no matter it’s PV power or grid.

NOTE: It’s allowed to set up AC charging duration. 

Load supply source: 

When PV power is available: 1st PV, 2nd Grid, 3rd Battery

PV power will provide power to the load first. If it’s not sufficient, grid will provide 
power to the load. If grid is not available at the same time, battery power will back 
up.

1st Battery, 2nd Load 

When PV power is not available:

1.  1st  Grid,  2nd  Battery:  Grid  will  provide  power  to  the  load  at  first.  If  grid  is  not 
available, battery power will provide power backup.

2.  1st  Battery,  2nd  Grid:  Battery  power  will  provide  power  to  the  load  at  first.  If 
battery power is running out, grid will back up the load.

NOTE: This option will become ineffective during AC charging time and the priority 
will  automatically  become  1st  Grid  and  2nd  Battery  order.  Otherwise,  it  will  cause 
battery damage. 

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Off-Grid (III)

PV energy supply priority setting: 

PV power will provide power to load first and then charge battery. Feed-in to the grid 
is  not  allowed  under  this  mode.  The  grid  relay  is  NOT  connected  in  Inverter  mode. 
That  means  the  transfer  time  from  inverter  mode  to  battery  mode  will  be  about 
15ms.  If  connected  load  is  over  10KW  and  grid  is  available,  this  inverter  will  allow 
grid to provide power to the loads and PV power to charge battery. Otherwise, this 
inverter will activate fault protection.

Battery charging source: 

1. PV or Grid: If there is remaining PV power after supporting the loads, it will charge 
battery first. Only until PV power is not available, grid will charge battery.  

2. PV only: It is only allow PV power to charge battery. 

1st Load, 2nd Battery 

Figure 14.9

Figure 14.10

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