completelycharged
Active member
- Joined
- Mar 7, 2018
- Messages
- 1,083
Caution - this only works with some inverters not all...
After reading just over 40 pages of a very long forum post (138 pages) in relation to modifications to an inverter part of the discovery was that if an inverter is disconnected from the gridand a grid tie unit is connected to the inverter output the grid tie will back feed through the inverter and charge the batteries. Granted there is no voltage control so your grid tie will over charge you battery if it is not disconnected, howerver I had not realised this works on a lot of inverters (not all).
The unit I have is a Power Star IR3048C and after reading through 40 pages I gave it a try and plugged my grid tie into the output of the inverter and switched it all on. Once the grid tie connected up power started to flow the invetrer was showing a "load" level of 14% as the device is just reading current flow and it is not setup to normally work this way so had no idead the current is flowing back into the batteries.
This now provides a 2-3kW charge route option from my grid tie....
I doubt that UPS units will work, but I'm not sure and don't really want to fry any more UPS units.
I wondered if anyone else here had tried this or have thier powerwall setup to charge from a relatively standard inverter ?
After reading just over 40 pages of a very long forum post (138 pages) in relation to modifications to an inverter part of the discovery was that if an inverter is disconnected from the gridand a grid tie unit is connected to the inverter output the grid tie will back feed through the inverter and charge the batteries. Granted there is no voltage control so your grid tie will over charge you battery if it is not disconnected, howerver I had not realised this works on a lot of inverters (not all).
The unit I have is a Power Star IR3048C and after reading through 40 pages I gave it a try and plugged my grid tie into the output of the inverter and switched it all on. Once the grid tie connected up power started to flow the invetrer was showing a "load" level of 14% as the device is just reading current flow and it is not setup to normally work this way so had no idead the current is flowing back into the batteries.
This now provides a 2-3kW charge route option from my grid tie....
I doubt that UPS units will work, but I'm not sure and don't really want to fry any more UPS units.
I wondered if anyone else here had tried this or have thier powerwall setup to charge from a relatively standard inverter ?