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Hi!
My system includes a REC Q BMS controlling 8p14s 41kwh batterypack, 12ea 275w solar panels and i EasySolar-II GX 3000/48-32.
During solar charging, expecially during 1500w+ charging and high SOC on batteries, the solar charger shuts down and is no longer visible in VRM interface.
I usually have to Remotely reboot the Easysolar to get it to work. Can then work some hours, or days.
Any ideas?
Regards Stig
I think I know what causes the Shutdown.
Different types of pv panels.
I have all 12 panels identical, connected 6 and 6 in series and then parallell.
Still having this issue, very enoying. Supplier wants to take the whole unit, but then i have a cabin without power for an uncertain timeframe... and without any garanties of solution..
No, all my 12 panels are the same, with same specs.
Still struggeling with the same at my system.
Hi, this is probably a stupid question, but if the problems occurs when bright sunlight, then...
"12ea 275w " -
That's 3.3kWp PV input, which should be OK vs the 4000W Max PV power, indicated here
https://www.victronenergy.com/upload/documents/Datasheet-EasySolar-II-24V-48V-3kVA-48V-5kVA-MPPT-250-70-100-GX-EN.pdf
The EasySolar has a 250/70 MPPT. Does the output from the PV, the string voltage, exceed the advised limit for the MPPT ?
Might be worth checking with the exact panel specs ? There's a tool here ...
https://www.victronenergy.com/mppt-calculator
I have no practical solar PV system experience, so this could be nonsense, just though it might be possible given the apparent circumstances?
Or, complete conjecture, is the float voltage a factor, as in this post
https://community.victronenergy.com/questions/189535/float-voc-and-mppt-rs-is-temp-correction-required.html
for an MPPT 250 one could guess at a 4x factor instead of 8x
Just an (uneducated) guess.
Hope you manage to fix your problems
