jes_sacramento
New Member
- Joined
- Sep 23, 2021
- Messages
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Has anyone tried using a constant voltage Sola type transformer with a small true sine wave battery operated inverter to turn on grid-tied inverters when the grid is down?
Of course, the problem with trying to fool the inverters to turn on is the rising voltage back feed into whatever you are using to synthesize a grid and get the inverters to fire up. A constant voltage transformer tied to your 60hz sine wave source should protect it from the rising voltage from the inverters and keep it from pushing current back into your small reference inverter, since is will only see 110V, no matter what the inverters are putting out [it would also be going through a 110v to 240V transformer to tie into the main panel and inverters, so that the 110V reference inverter will provide the 60 hz 240v "grid reference" to the solar inverters].
Obviously, this type of arrangement would necessitate enough of a load on the solar inverters to dump whatever load they can produce, but the goal here is to determine if a cheap and small battery backup could be used via a very small reference inverter to turn the system on without destroying anything.
Of course, the problem with trying to fool the inverters to turn on is the rising voltage back feed into whatever you are using to synthesize a grid and get the inverters to fire up. A constant voltage transformer tied to your 60hz sine wave source should protect it from the rising voltage from the inverters and keep it from pushing current back into your small reference inverter, since is will only see 110V, no matter what the inverters are putting out [it would also be going through a 110v to 240V transformer to tie into the main panel and inverters, so that the 110V reference inverter will provide the 60 hz 240v "grid reference" to the solar inverters].
Obviously, this type of arrangement would necessitate enough of a load on the solar inverters to dump whatever load they can produce, but the goal here is to determine if a cheap and small battery backup could be used via a very small reference inverter to turn the system on without destroying anything.