Page 94 of 108
Re: Idiot's guide to a self build battery
Posted: Sun Mar 03, 2024 5:36 pm
by nowty
Fintray wrote: ↑Sat Mar 02, 2024 8:59 pm
Colin Deng wrote: ↑Sat Mar 02, 2024 4:53 am
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 ?
Re: Idiot's guide to a self build battery
Posted: Mon Mar 04, 2024 8:00 am
by Fintray
nowty wrote: ↑Sun Mar 03, 2024 5:36 pm
Fintray wrote: ↑Sat Mar 02, 2024 8:59 pm
Colin Deng wrote: ↑Sat Mar 02, 2024 4:53 am
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.
Re: Idiot's guide to a self build battery
Posted: Mon Mar 04, 2024 10:56 am
by nowty
Fintray wrote: ↑Mon Mar 04, 2024 8:00 am
nowty wrote: ↑Sun Mar 03, 2024 5:36 pm
Fintray wrote: ↑Sat Mar 02, 2024 8:59 pm
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.
Re: Idiot's guide to a self build battery
Posted: Mon Mar 04, 2024 11:06 am
by Stinsy
nowty wrote: ↑Mon Mar 04, 2024 10:56 am
Fintray wrote: ↑Mon Mar 04, 2024 8:00 am
nowty wrote: ↑Sun Mar 03, 2024 5:36 pm
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.
Re: Idiot's guide to a self build battery
Posted: Mon Mar 04, 2024 1:40 pm
by 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 :-)
Re: Idiot's guide to a self build battery
Posted: Mon Mar 04, 2024 1:56 pm
by Stinsy
robl wrote: ↑Mon Mar 04, 2024 1:40 pm
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.
Re: Idiot's guide to a self build battery
Posted: Tue Mar 05, 2024 9:58 am
by 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.
Re: Idiot's guide to a self build battery
Posted: Wed Mar 06, 2024 8:51 pm
by 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.
Re: Idiot's guide to a self build battery
Posted: Wed Mar 06, 2024 8:53 pm
by Andy
Fintray wrote: ↑Wed Mar 06, 2024 8:51 pm
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.
Re: Idiot's guide to a self build battery
Posted: Wed Mar 06, 2024 8:56 pm
by Fintray
Andy wrote: ↑Wed Mar 06, 2024 8:53 pm
Fintray wrote: ↑Wed Mar 06, 2024 8:51 pm
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!
