I just successfully installed a SmartShunt 500amp to monitor my off grid cottage. So all good, but many differing opinions online on how it should be configured, so I’m looking for some assistance from someone with experience (and not just opinions).
I currently have 2 x 12.8 V 100Ah LiFePO4 Eco-Worthy Lithium Batteries feeding/charged by a Sterling Pro Combi S Inverter/Charger.
The batteries have a maximum charge of 14.6v and a discharge cut-off of 10v.
So my question is, can anyone please give me guidance on the wealth of menu settings to accurately monitor my setup? There are so many of them…
Charged voltage 0.2V below absorption voltage so 14.4V.
Tail current 4%
Battery capacity 200Ah
Peukert coefficient 1.05
Charged efficiency factor 99%
Discharge floor 10% or 20% depending on how low you plan on taking them. This is only used to calculate the time to go.
There is a setting towards the bottom of the page about what the unit starts at, if you have a choice then set it to retains value, I can not remember the exact wording.
Those voltages look pretty high to me for normal use…
14.6V (3.65V/cell) looks a bit high even for cell balancing/equalisation, but if that’s what the suppliers suggests then go for it – normally you’d only charge up to this voltage for a couple of hours occasionally, typically between once a week and once per month is recommended – and then you must stop charging and let the voltage drop back to “normal” levels (see below).
14.4V (3.6V) looks pretty high for “normal” charging, meaning something that happens every day – especially if you spend long periods at this voltage. There’s very little energy in LFP cells above 3.4V/cell, so little reason to go above this regularly – but again, see what the manufacturer documentation says.