This is the best advice, you have plenty of voltage range, and current limit is 18A.Please disconnect immediately and restring to 9s2p.
It's only a red alert when we approach -40F!RED Alert!
or -40C!!-40F!
I think it's safe to target 500VDC for VocSo what is really want then is to use Voc multiplied by the temp differential at -40C/-40F multiplied by the number of panels and keep that value below 450vdc not 500vdc to be safe.
I have 10 more panels not installed. I also have a second charge controller. Sadly that circuit has a 10amp DC rated breaker on it already as I was only anticipating 5.2amp max through that circuit in its current configuration.This is the best advice, you have plenty of voltage range, and current limit is 18A.
2 in parallel Isc is 10.42A.
Plus, you could add 9 more panels in parallel later for future expansion (use fuses if you do).
SCC is a boost only converter. Output of SCC must not exceed 500vdc. If array exceeds 500vdc it will just pass through boost diode of boost converter and overvoltage 500 vdc internal bus of inverter.Ok, the EG4 manaul says
Max PV array open circuit: 500vdc
PV array: 120vdc-450dvc
It's not clear why the voc and array max voltages are different then.
I have seen my panels briefly jump about 25% up in voltage and watts than the normal rated output during very cold weather and funky reflective clouds and snow on the ground at the same time…and whatever else is going on up there…be carefull ..It's only a red alert when we approach -40F!
I think it was Backwards Day for youSCC is a boost only converter. Output of SCC must not exceed 500vdc.
EG4 uses a standard PV boost SCC taken from a 230vac AIO HF inverter that uses a 500vdc internal HV DC bus for 230 vac PWM sinewave switching.I think it was Backwards Day for you
Buck-only and Input
Iant the internal bus of a high PV voltage AIO usually in the 300V?