Hi

Could two different inverters share a 48v AGM batter bank, assume and axpert and a goodwe ?

Could you maybe set one of them not to charge so you don't have feedback etc ?

Thanks

Edited April 23, 20197 yr by Dean

Yes ... if the one inverters charging can be switched off or if it is never plugged into Eskom to be able to re-charge.

3 hours ago, Dean said:

Could two different inverters share a 48v AGM batter bank, assume and axpert and a goodwe ?

Yes and no. Yes, it will work. No, there will possibly be some drawbacks.

Some inverters keep track of the state of charge of the battery. You configure them with the total battery capacity and they keep track of charging going in and coming out. I believe the Goodwe can do this. If you connect another load to the battery (any load at all), and your smart SOC-capable inverter doesn't know about it... it's going to get the SOC wrong.

The one place where this will actually work okay is a Victron setup with a BMV. The BMV keeps track of the SOC and will see the load of the second inverter. So you could do this with a Multiplus+BMV+(other inverter) setup, but that's really the only one that would work half-seamlessly.

Yes, you can share a battery between inverters, but I want to caution this: You might run into a ground loop fault between the two inverters. Measure the resistance between each inverter's neutral and different battery terminals, as well as the earth and different battery terminals. If there's any reading other than 0, it could cause a problem

1 hour ago, SilverNodashi said:

If there's any reading other than 0, it could cause a problem

Don't you mean ∞ resistance?

58 minutes ago, Coulomb said:

Don't you mean ∞ resistance?

Yes  But that might not show in his multimeter 

2 hours ago, SilverNodashi said:

Yes  But that might not show in his multimeter 

Most DMMs show -1 in the left most side of the LCD.

And for goodness sake, don't do it while the inverter is running 🙂