MeepMoop

Saga continues. 1 of my batteries was sent in for diagnosis. The single battery that I'm running on is now doing the same thing.

Thanks for posting your experiences! I too am an unfortunate user of 5100s batteries (the Raystech variant) and my saga with 40% to 0% soc drop is ongoing. Absolute run around from CFE support. They've got me debugging all sorts of stuff to "prove" that it is in fact the battery that is trash.

Good point. CFE also recommends similar in the manual. (Refers to voltage difference but implies SoC I guess).

@Jason5 Get CFE to update your firmware to at least let them only cycle between 95 and 100. Verdict. Who knows. Some people are okay with it, some aren't.

@Steve87 do you know what would the outcome be if all 8 were connected in series, instead of 4 series, 2 parallel?

@shylo229 what about something like Solcast to get readings regarding how much PV should be available in the next hour etc. https://github.com/oziee/ha-solcast-solar

Have a read https://www.solarquotes.com.au/blog/an-eastwest-spit-of-solar-panels-on-a-single-string-can-work-well/ The conclusion is basically that, yes it can be done effectively in very specific scenarios. What do you mean by that? Like, do you get way less power than the total that is facing the sun directly?

Sounds like it's a normal voltage drop that's caused by load that the inverter reads as decreased SoC. Getting a perfectly accurate SoC reading from lithium batteries using voltage alone is near impossible.

Awesome! Glad you're sorted

Hey @GrantCPT. So you've cycled the batteries down passed 40% and they survived okay? If so, that's great!

Alright. Good luck

@GrantCPT When the batteries drop to 1%, do you check on the app what each individual SoC is? In my case, the batteries were waaay out of sync. Something like 65% and 35% Regarding Battery SOH, the only place I can see that is on the Inverter LiBMS screen.

@Steve87 very cool.

Cool structures! Are the cement blocks mounted to the roof, or just loose?

What are you using it for?