Hoping for a Renogy system diagram review

Dustmopper · Feb 26, 2023

Hello,

I basically took the existing Renogy Camper Van Diagram and downscaled it a little for my needs (only one battery, smaller inverter, only 200W solar, smaller DC-DC charger). This set up is for a small camper van, Nissan NV200.

I'd love it if someone with a trained eye could take a look at my fuse sizing/positioning. The manual for the 30A DC-DC charger recommends 40A out and 45A fuse in.

Is a 15A fuse at the 200W solar panel right?
120A fuse to the 1000W inverter?
120A fuse to the 100A breaker?
Should I get a terminal block fuse right at the 100ah battery? If so what size?

My wire sizing plan is as follows:

10 AWG for everything solar
4 AWG from battery to bus bars
4 AWG from bus bars to inverter
6 AWG for everything else

I also added a DC on/off switch coming in from the solar which is not in the Renogy diagram.

Please let me know if you have any comments or suggestions, I would really appreciate it!

Thanks!

mikefitz · Feb 26, 2023

Your 100Ah battery is rated at 100 amps continious so keep this in mind, the BMS may allow short term higher current
Solar fuse at 15 amps is optional, not technically needed for a single panel.
Master fuse at the battery positive terminal is a good idea, ( if there is a fault and the BMS fails), a Blue Sea MRBF fuse 150A and holder may fit directly on the battery terminal.
The fuse distribution box will never have a high load. Its rated for 100 A max. With the awg 6 feed cable fuse at 50 amps., keep this fuse as close as practical to the positive buss bar to keep unprotected cable runs to a minimum , same strategy for fuses In the charger and inverter feeds.

Dustmopper · Feb 26, 2023

mikefitz said:
Your 100Ah battery is rated at 100 amps continious so keep this in mind, the BMS may allow short term higher current
Solar fuse at 15 amps is optional, not technically needed for a single panel.
Master fuse at the battery positive terminal is a good idea, ( if there is a fault and the BMS fails), a Blue Sea MRBF fuse 150A and holder may fit directly on the battery terminal.
The fuse distribution box will never have a high load. Its rated for 100 A max. With the awg 6 feed cable fuse at 50 amps., keep this fuse as close as practical to the positive buss bar to keep unprotected cable runs to a minimum , same strategy for fuses In the charger and inverter feeds.

Cool thanks for your help!

I'm going to go with the 15A fuse on the solar panel because I already bought it.

I'll nix the 120A fuse for the breaker box, since anything hooked to it will have its own fuses.

I'll add a 150A terminal fuse at the battery as well.

I will try to keep my cable runs as short as possible, the only longer one will be from the vehicle battery to the 30A DC-DC charger.

Thanks again!

mikefitz · Feb 27, 2023

You must have a fuse to protect the fuse box and the cable from the buss bar to the fuse box. Unprotected lengths of cable may ignite if a fault occurs.

Hoping for a Renogy system diagram review

Dustmopper

New Member

mikefitz

Solar Wizard

Dustmopper

New Member

mikefitz

Solar Wizard

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