So, I'm planning to provide whole-house backup in the event of a grid outage. Not that these events happen very often around here, but if the H1 (G2) can do it, I might as well use that feature.
I'm only going to do a manual changeover. As I understand it (we're on TN-C-S), I need to fully disconnect the mains input (including earth), and I'll need to supply a ground rod.
So the question is, can you leave the grid input of the H1 inverter connected directly (via RCBO) to the mains during the period when the EPS is active?
I have a drawing nearly ready, but in words, the connectivity would be:
Mains in -> meter -> fuse -> isolator -> inverter GRID via RCBO, and also to the changeover switch
The EPS output goes to the other changeover input, then the output of this switch goes to the CU.
EPS Earth to CU earth bar.
Earth rod to CU earth bar.
Additional isolator for the mains earth to the CU earth bar.
I already have a small CU ready for the EPS, containing an RCD, and MCBs for a double-socket, light, and (hopefully) the changeover switch.
I may, or may not, do this all myself or get my friendly sparky in.
HI,
So that question didn't get much response!
Can I ask a simpler one...
When the grid is down and the EPS output is active, does the inverter only run from the battery, or does it still use solar too?
I ask because my installer said this in relation to getting hold of the EPS plug that they failed to leave behind...
"The EPS only disconnects the battery, not the whole system so when the battery is drained that will be it until the power comes back - to have full use of the panels and battery during a power cut you will need an automatic disconnect switch that will disconnect the property from the grid, allowing full use of the Solar system. "
So that question didn't get much response!
Can I ask a simpler one...
When the grid is down and the EPS output is active, does the inverter only run from the battery, or does it still use solar too?
I ask because my installer said this in relation to getting hold of the EPS plug that they failed to leave behind...
"The EPS only disconnects the battery, not the whole system so when the battery is drained that will be it until the power comes back - to have full use of the panels and battery during a power cut you will need an automatic disconnect switch that will disconnect the property from the grid, allowing full use of the Solar system. "
With my KH7 inverter, it charged the battery from the PV during a power off event (two times; getting de-looped from neighbour, and being off during fitting of EVCP)
I didn't have any draw from my EPS, as it's just a twin socket on the wall.
The only rule you need to be sure of, is make sure you only have a small amount of load connected to your EPS circuit, as overloading will shut you down.
I didn't have any draw from my EPS, as it's just a twin socket on the wall.
The only rule you need to be sure of, is make sure you only have a small amount of load connected to your EPS circuit, as overloading will shut you down.
Thanks.
I wonder if the KH works differently from the H1 that I have. It looks like it's just a beefier inverter.
My first hurdle is to try to get the EPS plug that the installer doesn't want to provide.
I wonder if the KH works differently from the H1 that I have. It looks like it's just a beefier inverter.
My first hurdle is to try to get the EPS plug that the installer doesn't want to provide.