On 4/17/2026 at 6:34 PM, BritManToo said:

I have some batteries as backup, but they only get used if the grid goes out. Most modern inverters will export to the grid when they can, but just supply to the home when no grid.

On 4/17/2026 at 6:34 PM, BritManToo said:

but just supply to the home when no grid.

Except at night.

I presume you have an automatic disconnect from the grid when batteries come into play (anti islanding).

That would be new and probably a minefield of fail safe circuitry.

2 hours ago, Muhendis said:

Except at night.

I presume you have an automatic disconnect from the grid when batteries come into play (anti islanding).

That would be new and probably a minefield of fail safe circuitry.

The inverter does it all, the mains feeding it is also the grid output.

19 hours ago, PJ71 said:

How much was the genny? how much fuel does it use?

I also have a genny, a noisy one!

19 hours ago, PJ71 said:

How much was the genny? how much fuel does it use?

I also have a genny, a noisy one!

19 hours ago, PJ71 said:

16Kw 'usable' for each battery?

with total 48Kw, can you run ALL the aircons thru the night?

We don’t run them all night as all the rooms are not occupied, but if we ran all of them, the 48kw could handle them, I am a firm believer in buying more than you need, like in our living room, it is massive, and I have two split packs in there, we never run both at same time, unless there is a party going on. Been watching the battery capacities, none are never below 41% or so - they are programmed if they get below 20%, local power kicks in to recharge. (I think)

2 hours ago, Explorator en Action said:

We don’t run them all night as all the rooms are not occupied, but if we ran all of them, the 48kw could handle them, I am a firm believer in buying more than you need, like in our living room, it is massive, and I have two split packs in there, we never run both at same time, unless there is a party going on. Been watching the battery capacities, none are never below 41% or so - they are programmed if they get below 20%, local power kicks in to recharge. (I think)

Yeah i agree about oversizing.

Thanks for the info.

14 hours ago, BritManToo said:

The inverter does it all, the mains feeding it is also the grid output.

I'm a bit lazy today, so can you save me looking back through your posts and tell me what inverter you are using please?

1 hour ago, Muhendis said:

I'm a bit lazy today, so can you save me looking back through your posts and tell me what inverter you are using please?

PowMr 6k2

4 hours ago, BritManToo said:

PowMr 6k2

Thanks.

That's not a grid tie inverter.

It is a hybrid inverter which means it does not have any grid feed-in capabilities.

It can take power from the grid for house use and charging batteries (if you wish).

It can also be programmed to give priority to either solar or grid for battery charging.

Does it work OK for you?

Some people (not me) are having setup problems with it.

1 hour ago, Muhendis said:

Thanks.

That's not a grid tie inverter.

It is a hybrid inverter which means it does not have any grid feed-in capabilities.

It can take power from the grid for house use and charging batteries (if you wish).

It can also be programmed to give priority to either solar or grid for battery charging.

Does it work OK for you?

Some people (not me) are having setup problems with it.

I must be imagining the 12kwhr it winds my electricity meter back every sunny day then.

For some reason it will only feed the grid if I select SUB mode.

SBU refuses to feed back. But I guess that saves my very old battery.

The only faults I can pick is the fans are very loud, and the instructions are a bit lacking. Took me 2 days to work out how to export to the grid.

But on the plus side, 3 year warranty from the Thai distributor, and only 6,500bht on Lazada sale days.

1 hour ago, BritManToo said:

I must be imagining the 12kwhr it winds my electricity meter back every sunny day then.

5555

Thanks. That is very revealing. There are some inverters which cost considerably more than PowMr which are only grid tie and don't have battery connections.

Also Google AI (bless 'em) is adamant that all grid tie inverters are batteryless beasts.