Poor Man's Trimetric?
I want a cheap sort of 12v battery monitor that can measure at least 100a and keep track of AH. Need some advice here on whether these possibles are any good in the first place, and then about the ac...
Forum Discussion
brulaz wrote:
2 Oldman assumes the 13V and uses Wh = V x Ah
So 1000Wh / 13V = 77Ah
But your V will not always be 13V and any conversion will be slightly off.
The 13V assumption is the problem.
Might be easier to start with an idea of battery bank Wh when full and when half full, but that is with two voltages 12.7 and 12.1
ISTR Mr Wiz uses Wh. Maybe he can say how he does that.
So at least there might be a way to get " close enough" to an AH count, since there will also be a "low load-camping type resting" voltage same as now to use as a cross-check.
If both the OP monitors would actually work, then the price difference is the cost of having AH vs WH and whether that is worth it to not have to do the conversion.
