foxontherun wrote:Don, hope your trip is going well. My wife and I visited the RV museum when we went to pick up our trailer in MI back in 2018. Pretty neat to see all the old RV's. Question for you, what size wire do you have running thru roof to carry all your solar? I am in planning stages for adding solar at some point and want to go ahead and install the interior wiring to accept what comes in from the roof.
I plan to probably have six 6V golf cart batteries for around 1380 amps. I will probably start out with four (920 amps) to see how that pans out first but do plan to build the system for six so it is ready to go. Where my planned solar entry is will be on driver side and batteries are going to be on passenger side (prefer no holes in roof); so there will be about 14 feet from entry in side wall across the trailer and down to batteries. What size wire would you recommend?
Thanks!
Harry
Hi Harry.. the size wires depends on how you plan to set up your system. For instance, a 24VDC array configuration will reduce current by half and therefore, reduce wire gage need. Also, I have two independent systems (500W and 300W) which also reduces the gage need for the power in each run, but also increases the wire (linear feet) need.
I have used 8 gage wire from arrays to the solar controllers. 8ga is good for 40A which my 5 panel configurations needs for maximum output. I'd need a larger gage if I was to run all panels through the same wire (all 800W). Figure out how much solar power you will have, then decide on 12VDC or 24VDC configuration then determine maximum current the wires may carry based on your configuration. There are wire gage calculators online to help you select the proper gage for the maximum current. That's what I'd do in any case.
I have 4 Gold Cart Batteries and they are 450aH total for 225aH useable. 920A (assuming you mean Amp Hours "aH") seems like a lot for 4 batteries unless they are just huge. What batteries are you planning to get?