csaba911
Member
Going to make a quick sketch of what I had in mind but first want some input on this.
RV main battery currently have isolator installed but the house side blew up for some reason.
Main battery for engine, cabin, signal, break and head lights only, from here isolator and heavy gauge wire feed to the back battery box (3x deep cycle battery in parallel)
I want to separate the 3 battery and have a charge-discharge controller for it.
Each battery will feed the house independently until reach the cutoff voltage 11.5V
If the engine or the generator running than it would charge them independently until reach full state.
Voltage and current will be measured with 12bit
ADC.
Got 20+ IRFB7530 N channel mosfet (1.2m ohm/190Amp), 0.01 ohm 0.1% 5w dale resistor for current sensing (op amp 30x gain) maximum current draw when all lights and the furnace running is 17Amp (never run everything in the same time)
Without having actual schematics made up I not sure how is the fets body diode will effect the voltage trail.
The reason why I'm planing to separate the 3 house battery because in parallel they always fail after 3-4 years will the main engine battery runs just fine for the 7th year.
RV main battery currently have isolator installed but the house side blew up for some reason.
Main battery for engine, cabin, signal, break and head lights only, from here isolator and heavy gauge wire feed to the back battery box (3x deep cycle battery in parallel)
I want to separate the 3 battery and have a charge-discharge controller for it.
Each battery will feed the house independently until reach the cutoff voltage 11.5V
If the engine or the generator running than it would charge them independently until reach full state.
Voltage and current will be measured with 12bit
ADC.
Got 20+ IRFB7530 N channel mosfet (1.2m ohm/190Amp), 0.01 ohm 0.1% 5w dale resistor for current sensing (op amp 30x gain) maximum current draw when all lights and the furnace running is 17Amp (never run everything in the same time)
Without having actual schematics made up I not sure how is the fets body diode will effect the voltage trail.
The reason why I'm planing to separate the 3 house battery because in parallel they always fail after 3-4 years will the main engine battery runs just fine for the 7th year.
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