Idiot's guide to a self build battery

[nowty]

On my way to the factory and arrange the shipment now
Video will be later today

Thanks

Hi Colin,

Thanks for the update on our batteries, much appreciated.

Fintray, just interested in how you are going to integrate the batteries with your Powerwall 2 ?

Or is this going to replace it, or even a second battery system ?

[Fintray]

On my way to the factory and arrange the shipment now
Video will be later today

Thanks

Hi Colin,

Thanks for the update on our batteries, much appreciated.

Fintray, just interested in how you are going to integrate the batteries with your Powerwall 2 ?

Or is this going to replace it, or even a second battery system ?

Nowty,

I'm not sure how the 2 systems will react with each other but the batteries from Colin will be going through a Victron system.

[nowty]

Hi Colin,

Thanks for the update on our batteries, much appreciated.

Fintray, just interested in how you are going to integrate the batteries with your Powerwall 2 ?

Or is this going to replace it, or even a second battery system ?

Nowty,

I'm not sure how the 2 systems will react with each other but the batteries from Colin will be going through a Victron system.

OK, so the Victron could just simply be an on/off grid manual pump and dump buffer.

[Stinsy]

Fintray, just interested in how you are going to integrate the batteries with your Powerwall 2 ?

Or is this going to replace it, or even a second battery system ?

Nowty,

I'm not sure how the 2 systems will react with each other but the batteries from Colin will be going through a Victron system.

OK, so the Victron could just simply be an on/off grid manual pump and dump buffer.

I’ve said before that if you want/need 2x battery inverters then an acceptable solution is for one to be “smart” and target zero import/export via a CT and the other can Charge at full whack during the cheap period and discharge at 500W (or whatever your “baseload” is) the rest of the time.

[robl]

If one of your inverters connects to your consumer unit, and the other one connects via a Henley block then you’ve got separated power and you can have both inverters following demand, each with a CT. So in the pic below, “hybrid inv” connects to the consumer unit, and gets a CT that just sees the consumer unit - so hybrid nulls this power. Then as well, with a Henley block, you can have “existed inv” and the blue CT - this is on the overall meter tail. If anything gets past the “hybrid inv” then this will pick it up. Eg if the hybrid inv is full or empty or excessive current.
Ignore the “wrong” in the old pic I found, honest :-)

[Stinsy]

If one of your inverters connects to your consumer unit, and the other one connects via a Henley block then you’ve got separated power and you can have both inverters following demand, each with a CT. So in the pic below, “hybrid inv” connects to the consumer unit, and gets a CT that just sees the consumer unit - so hybrid nulls this power. Then as well, with a Henley block, you can have “existed inv” and the blue CT - this is on the overall meter tail. If anything gets past the “hybrid inv” then this will pick it up. Eg if the hybrid inv is full or empty or excessive current.
Ignore the “wrong” in the old pic I found, honest :-)

In theory yes. However in practice this can lead to unintended consequences. For example: one battery inverter charging at full whack while the other battery inverter discharges at full whack.

[Andy]

You will probably be able to let the power wall empty and then have the victron take over later using a bit of node red code. You'll need a cerbogx or similar to run everything.

[Fintray]

Thanks for the replies guys, I'm sure there will be a suitable way for them to work together

Andy I have a Cerbo GX ready and waiting.

[Andy]

Thanks for the replies guys, I'm sure there will be a suitable way for them to work together

Andy I have a Cerbo GX ready and waiting.

Cool, there are node red nodes for getting power wall information already. Should be quite simple to set up the logic.

[Fintray]

Thanks for the replies guys, I'm sure there will be a suitable way for them to work together

Andy I have a Cerbo GX ready and waiting.

Cool, there are node red nodes for getting power wall information already. Should be quite simple to set up the logic.

I might be calling on your knowledge some time in the not too distant future then Andy!