Added a second battery today - does it need to be recommissioned ?

First post here ...

I've got a 3 kW invertor and had an installer add a 9.5 kWh battery alongside the existing 8.2 kWh one that we've had for the last six months. The new, larger gen 1 battery is now set as the primary one with the older gen 1 battery relegated to secondary.

In the portal I can see that the combined capacity is correct (17.72 kWh) but I'm only seeing the battery percentage for one battery in the app and dashboard but using Home Assistant I'm seeing two battery percentages.

My original system was installed by another installer and the one who installed the new battery couldn't recommission the system as it appeared to be locked persumably as it's already been commisioned. Is recommissioning necessary anyway ? Do I need to calibrate the system by fully draining and charging it ?

Thanks in advance

Phil

It'll probably need recalibration.

Can only be done by GE or the original installer.

So perhaps try a web chat to GE tomorrow (webchat seems best option for speed)

Webchat is available on their contact us web page during office hours.

When I had a second 8.2 installed to partner the existing 8.2 then the system ran a full calibration.

Thanks for the replies. I'll give GivEnergy a shout tomorrow then.

Oddly, we had no way to recalibrate or recommission the system at all.

Phil

The installer should have set it off.

Zakalwe Agreed but after an hour of trying, he couldn't get into the inverter to recommission it so we gave up and will try again tomorrow.

Try the Webchat on the GivEnergy "Contact" page. They will be able to remotely start a calibration.

I have 4 batteries (on a hybrid inverter). As far as I know the portal and app can only see it as 1 battery... Unless my system has been setup wrong, which wouldn't surprise me.

I have 2 batteries but only see a total percentage on the portal. Yes you will need GE to commission it. Great fun during peak rate watching it fully discharge 17kw of battery then fully charging them! If you phone GE about 5:30 you can get them to start it then. and hopefully make use of any cheap rate tariff you may have? They can't schedule it to run at a later time.

THALL You can set the charge rate low and increase it when you reach the cheap period too.

chris_p When GE calibrate it? I didn't know that. When they did mine I had around 60% charge so that had to discharge at 3kw before charging all 17.7kw at 3kwh. So it uses my entire 5 hour cheap period and then some!

THALL Yeah on my last calibration it was started at 9am but the sun was only providing 1kW. So I adjusted the charge rate to match and waited until the sun was stronger and upped it again. Ended up with full calibration and used hardly anything from the grid.