Solar Install question
I am planning to install two 160 watt panels on the roof of a Class C RV. I would like to make the installation where I can add another 160 watt panel if needed in the future. The wiring will be in ...
Forum Discussion
I would suggest to use MC4 cable from the modules to a combiner box. You can make your own or buy a bus box from any number of retailers. You won't need fuses or breakers inside this box because you only have one string of modules. Parallel the MC4 cables inside the box. Run your wire to the controller with an interrupter in that wire. I use a 25 amp manual circuit breaker but any switch rated to the total solar amperage will work. I'd say about 50% of RV installers do this and it is worthwhile for the couple of dollars it costs. You can cut power to the controller easily if you need to work with 12V wiring or the batteries.
I'd suggest to look at the price of 4 ga welding cable vs the #6 marine wire. I think they are similar in price and #4 will have less voltage drop.
You will also need a fuse or circuit breaker on the battery side with the controller's charge wire. I used a MEGA style fuse on the battery terminal stud, it bolts on. If you use a bolt on fuse, there is no need to buy a fuse holder.
I'd suggest to look at the price of 4 ga welding cable vs the #6 marine wire. I think they are similar in price and #4 will have less voltage drop.
You will also need a fuse or circuit breaker on the battery side with the controller's charge wire. I used a MEGA style fuse on the battery terminal stud, it bolts on. If you use a bolt on fuse, there is no need to buy a fuse holder.
