AlaskaProf
Guru
- Joined
- Jun 26, 2016
- Messages
- 2,293
- Location
- US of A
- Vessel Name
- boatless, ex: Seeadler
- Vessel Make
- RAWSON 41
Battery Conundrum:
I have two large symmetrical banks of golf cart batteries. (no generator). They run to two of the typical 4position rotary switches and are cross linked so either bank can be selected. The starboard switch has all the house load. At anchor, the port swith OFF protects the other bank for starting.
Normally, when we go to bed, the Magnum inverter will read 12.3 or so volts. as it did last night. By morning, fridge, computer, phone chargers may draw down to 11.9ish
This morning we were reading 9.8 on arising. Startling, but not fatal; there's another bank still reserved for critical functions. I turned on the Wallas cookstove and it showed a low voltage fault, seeming to eliminate gauge error. Fortunately my cabin heater will make coffee.
Now here's the puzzle: About an hour after we noted the issue, the voltage on the inverter steadily climbed to a normal 11.8v! Wallas stove confirmed this by starting normally.
WTF? over.
I have two large symmetrical banks of golf cart batteries. (no generator). They run to two of the typical 4position rotary switches and are cross linked so either bank can be selected. The starboard switch has all the house load. At anchor, the port swith OFF protects the other bank for starting.
Normally, when we go to bed, the Magnum inverter will read 12.3 or so volts. as it did last night. By morning, fridge, computer, phone chargers may draw down to 11.9ish
This morning we were reading 9.8 on arising. Startling, but not fatal; there's another bank still reserved for critical functions. I turned on the Wallas cookstove and it showed a low voltage fault, seeming to eliminate gauge error. Fortunately my cabin heater will make coffee.
Now here's the puzzle: About an hour after we noted the issue, the voltage on the inverter steadily climbed to a normal 11.8v! Wallas stove confirmed this by starting normally.
WTF? over.