Hi from Christmas Island, with a couple of 100% off-grid, solar setups, each using a bank of 4 BYD B-PLUS 2.5. 2.56kWh, 51.2V, LFP Battery Units. I've installed a BMV SMART-712 shunt to hopefully give more accurate SOC, but am unsure on exact charge values I should dial in, really struggling to find answers online, and all businesses I've reached out to haven't really been able to give me any info. My system uses a Victron MultiPlus 48/3000 35-50 and a BlueSolar Charger MPPT 150/70.
Main question is - What should 'Charged voltage' be? I have it set to 56.8V (it was on 55.2V for ages which seems low and may explain why my batteries never seemed have much capacity). Some battery spec sheets (and written on battery itself) say "Working voltage: 44.8V-57.6V" but other spec sheets for the same battery say "Operating Voltage Range: 43.2~56.4V". If it's too low I worry i'm not getting full capacity from my battery (critical in my case), and if too high I worry I'll fry it somehow.
I'm more confident about the other settings, but would love some reassurance:
Discharge floor: 90% (I assume that's correct way around, not 10%)
Tail current: 4%
Charged detection time: 3m
Peukert exponent: 1.05
Charge efficiency factor: 98%? (I see mentions of only 'round trip efficiency 95-96%' on the battery specs though? Sounds low?)
Current threshold: 0.05A
Time-to-go averaging period: 3m
Thanks very much, I'd really appreciate some advice.
Chris