Solar PV battery options

They keep extending the buyer protection but I am getting at the end of my rope now with them.

All 16 batteries charged to 3.59 - 3.62. Doing the math they were at a very low SOC. Hopefully Sunday I’ll get time to put some of it together.

But nominal voltage is 3.2 so that's how you usually calculate capacity. Also you really don't want your batteries at 3.6V for long periods. That's the charge voltage i.e. voltage applied by the charger and not the voltage of the battery at rest and certainly not the voltage you see when you are drawing current.

thank you to all who have contributed to this thread - it's a fantastic resource.

I've taken the plunge & ordered 32xCALB 200 cells from a previously mentioned supplier to upgrade my existing Victron + BYD 5kWh Solar/Battery system. (6kW of solar)

project is for 1) fun/hobby/learning, 2) to have options in a power cut / grid instability, 3) this won't save money - except over very long term - although my personal belief is that grid unit costs will skyrocket over the next few years and I'll be glad to mostly consume EV rate grid power and keep the monthly bills reasonable (~40kWh/day winter consumption).

My intention is to switch smart rate suppliers/tariffs yearly, using the ev rate power=>big battery + solar to minimise peak rate usage. I already automate my 5kWh battery system to control night-charging the battery using OpenHab/mqtt control of the Victron system (using cloud forecast to decide how much to charge while trying to avoid exporting unnecessarily). On a good day now, the battery is empty by 4-5pm - but that's my first peak rate consumption of the day (outside of surges, etc). My hope with this project is to reach 11pm (/end of peak rate) still on battery for most of the year... should be fun 😀

I do - was installed about a year ago out of the blue. I've just been on a standard tariff until recently - doing a bonkers switch every year. Hopefully, there will still be value in regular switching with the smart tariffs.

very interesting... I hadn't given much thought to paralleling my existing battery with the new DIY battery. Another fun rabbit hole of research :)

Im learning/researching this at the moment. I didn't realise you could go with 32 cells. Can you send your wiring setup and what the capacity will be?

Also as a general question to everyone, is it possible to have 2 battery only inverters installed and working together? I've seen a lot quote a sofar battery inverter. I was thinking that I would like do a 10kw battery but wanted to make sure if I ever wanted ot was possible to expand that.

Yeah that's exactly what I'm thinking re 16, so when I seen the 32 together it definitely peaked my interest.

I currently have 1 EV with another on order for around July. I'm putting in a DIY e/w solar setup of around 4.6kW on the shed which will only cost about 3.5k. In spring of 2023 (remortgage dependant) we will be getting an attic extension where we could get another 6kW on a south facing roof, id look to have the battery setup by that so to get the summer out of it.

Ordered on the 21st Jan from OYE and have had no contact since. I know they were away for Chinese New Year but they are back now so surprised that I've had no update at all. Was this the same for you.... no comms until the batteries arrived in Poland?