Wiring diagram - Find my mistakes!
Dear Community, I am at the initial phase of my camper van conversion in China, in which I am planning to live and work together with my wife. Camper vans in China are not popular though they produ...
Forum Discussion
What is the reason for the DC-DC charger? Doesn't the alternator keep the chassis battery charged? Plus with the 2 batteries in parallel the voltage from solar should keep them both charged. But normally there will be an automatic connect of the 2 banks only when the engine is running, otherwise disconnected so that the chassis battery is always charged so that you can start and go.
Your solar has both 10 and 6 ga wires, should be the same. Wire size is based on the amps and series voltage. My panels for example are 9A and 36 Vmp with 62' of 10 ga wire and about 2% voltage loss. No need for the fuses on the MPPT input as the panels will not be damaged with a short. See the Imp panel spec. Use you panel specs, wire length and online wire calculator to determine voltage loss. 3% or less would be good. To be clear your panel wiring is not carrying 40A, but a lot less due to the higher voltage, MPPT converts the higher panel voltage power to lower voltage with more amps on the output. Posting panel specs will help.
The most critical wiring is from the MPPT output to the house battery and from the house battery to the inverter. Wires should be as short as possible and sized to handle the higher amp loads to minimize wiring voltage loss.
You show the red AC wire grounded which is OK if it's the neutral. In the US neither would be grounded and there would be a separate ground wire.
Hope this helps.
Your solar has both 10 and 6 ga wires, should be the same. Wire size is based on the amps and series voltage. My panels for example are 9A and 36 Vmp with 62' of 10 ga wire and about 2% voltage loss. No need for the fuses on the MPPT input as the panels will not be damaged with a short. See the Imp panel spec. Use you panel specs, wire length and online wire calculator to determine voltage loss. 3% or less would be good. To be clear your panel wiring is not carrying 40A, but a lot less due to the higher voltage, MPPT converts the higher panel voltage power to lower voltage with more amps on the output. Posting panel specs will help.
The most critical wiring is from the MPPT output to the house battery and from the house battery to the inverter. Wires should be as short as possible and sized to handle the higher amp loads to minimize wiring voltage loss.
You show the red AC wire grounded which is OK if it's the neutral. In the US neither would be grounded and there would be a separate ground wire.
Hope this helps.
