GRUMPY wrote: ↑Sun Jan 14, 2024 12:30 pm
hi
max protection voltage which i presume is overvoltage protection is 58.5v
max charge voltage is 56.5v
full charge v is 55.0v
hope this helps
Your "max charge voltage" and "max protection voltage" look OK (but only when running with a BMS folks), but I would increase your "full charge voltage" to at least the "max charge voltage", I have mine set slightly above the "max charge voltage" but below the "max protection voltage".
For a 16 cell LFP battery my crib sheet is,
16.9kW PV > 109MWh generated
Ripple 6.6kW Wind + 4.5kW PV > 25MWh generated
5 Other RE Coop's
105kWh EV storage
60kWh Home battery storage
40kWh Thermal storage
GSHP + A2A HP's
Rain water use > 510 m3
hi
thanks for the crib sheet info
i will check that against mine
for some reason the max charge voltage on my inverters only go to 55v
i was thinking it was possibly because im on the default battery setting
also on my inverter settings my max charge is 52amps and my max discharge is 55amps
should these readings be the same ie 52 and 52 or 55 and 55
please advise
GRUMPY wrote: ↑Sun Jan 14, 2024 2:58 pm
also on my inverter settings my max charge is 52amps and my max discharge is 55amps
should these readings be the same ie 52 and 52 or 55 and 55
please advise
I only use my unit in dumb mode without CT clamps as a supplementary battery charger and a forced discharger.
I have both my change and discharge set to 60A, I think it goes higher to 65A but the heatsink starts getting a bit warm.
16.9kW PV > 109MWh generated
Ripple 6.6kW Wind + 4.5kW PV > 25MWh generated
5 Other RE Coop's
105kWh EV storage
60kWh Home battery storage
40kWh Thermal storage
GSHP + A2A HP's
Rain water use > 510 m3
GRUMPY wrote: ↑Sun Jan 14, 2024 2:58 pm
also on my inverter settings my max charge is 52amps and my max discharge is 55amps
should these readings be the same ie 52 and 52 or 55 and 55
please advise
I'd strongly advise going with something that is connected with coms to the inverter.
For example your question above- really that is dependant also on temperature. As you have it now the inverter has no idea if the batteries are cold and you should be limiting the charge and discharge currents. You can get away with that if they are in a warm house but if they are in the garage or a shed then you need caution.
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
As Tinbum says, a BMS with comms to the inverter is preferred but the JK BMS you have can do that with an adaptor board in the middle.
You can purchase a stupidly overpriced and now closed source board, but I've built two boards myself that do the same job for a lot less.
I can see if I have the parts to assemble one for you if it's something you're interested in.
10x 405W JA Solar panels (4.05kWp) @ 5 degrees
3x 405W Longi panels (1.22kWp) @ 90 degrees
16.5kWh DIY LifePo4 battery
Solis inverter/charger
0.6kW Ripple WT
64kWh Kia E-Niro
ALAN/ALAN D wrote: ↑Sun Jan 14, 2024 5:54 pm
He has got two battery banks wired in parallel on each inverter.
Would the inverter software be able to communicate with both B.M.S. Systems at the same time.
As I requested at the beginning of this thread we need a diagram.
If it's 2 banks in parallel on a single inverter then yes the bms on each bank will communicate with each other fine and then communicate with a single inverter.
It's only complicated if both inverters communicate to a single shared battery bank.
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
Hi
I did put a diagram on page 1
And the batteries go to each inverter on that diagram
I will do another with the batteries added as well on each inverter if it's easier