Beware higher morning voltage

softdown
softdown Solar Expert Posts: 4,082 ✭✭✭✭
in Off Grid Solar & Battery Systems #1
6am voltage has been ~ 48.2V due to cloudy afternoons, hot weather and multiple freezers. Was 48.8V until a couple weeks ago.

This mornings voltage was ~ 49.2V so I was pretty happy to see the improvement. Just figured the sky was less cloudy and I used less energy than normal. 

Decided to check the new freezer temp alarms I installed yesterday. The largest commercial freezer was at 22F so I started poking around. 

Turns out that a power strip somehow died last night. Three freezers were receiving no power. I had a power outage alarm on the outlet but not on the power strip. 

Tomorrow's 6am voltage will be “concerning.” Especially given the cloudy conditions this afternoon. Already down to 50.3V at 6:45pm.

The freezer temp alarm is not loud enough and sounds periodically. Perhaps the freezer alarm is what got my dog barking at 4am.

Beware higher morning voltage. 


First Bank:16 180 watt Grape Solar with  FM80 controller and 3648 Inverter....Fullriver 8D AGM solar batteries. Second Bank/MacGyver Special: 10 165(?) watt BP Solar with Renogy MPPT 40A controller/ and Xantrex C-35 PWM controller/ and Morningstar PWM controller...Cotek 24V PSW inverter....forklift and diesel locomotive batteries
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