Just to update this thread.
It is now 11/07/2023 and I started this thread on 27/10/2021
Since getting my batteries the following has happened.
After 10 ish months I took my BBone in, batteries replaced under warranty.
I also bought 2x extra batteries at that time, so 4x new batteries overall. They started beeping the other night, not sure if batteries are done for again, its weird we didn't have much loadshedding recently.
I can send those 2x new batts in for warranty, but even so, it's such a hassle.
Ultimately it all costed me like R17 000? I think? I know the first time was waaaaay cheaper than stuff is now.
So R17 000 for it to last about 2 years ish. Not terrible, but not amazing. Knowing what I know now about lead acid AGM, I would in future go lithium.
But the prices are kinda crazy right now. So idk.
I think that these BBones are decent for the price, but in future I would go for Pure Sine Wave and I will get something that has BMS - or add it seperately after.