#133887  by Neddy
 Thu Oct 26, 2017 6:48 pm
This pictorial wiring diagram shows how to connect a solar panel, solar controller and House battery to provide a basic RV solar power installation.


Red cables are Positive, Black cables are Negative. Note that cable thickness varies according to the current it has to carry and the length of the cable run.
Appropriate Cable gauges can be calculated here :- https://www.omnicalculator.com/physics/voltage-drop
Adequate cable sizing will keep transmission losses low. 1% is excellent, 2% OK, 3% not so good.

This spreadsheet will give some idea of panel, controller and battery costs.

The Busbar, switch, fuses and fusebox will add another $40.
Cable costs are not included.


Edited to retrieve image as a test - scubadoo
Last edited by scubadoo on Thu Apr 19, 2018 10:05 pm, edited 1 time in total. Reason: Edited to retrieve image
 #133894  by Zukiwi
 Thu Oct 26, 2017 7:53 pm
Neville, you really should "write the book". That's a great synthesis of the basics of a solar system.

Chris - can this be posted in links as you've done for the cable sizing chart?

 #133919  by Nut17
 Fri Oct 27, 2017 10:00 am
Synthesis | Definition of Synthesis by Merriam-Webster
Definition of synthesis. plural syntheses \-ˌsēz\ 1 a :the composition or combination of parts or elements so as to form a whole. b :the production of a substance by the union of chemical elements, groups, or simpler compounds or by the degradation of a complex compound.

I think synthesis is good in this context :TU ;) :)

 #133921  by vansvilla
 Fri Oct 27, 2017 10:58 am
Clear and simple Neddy.
Are you able to show how a shunt would be incorporated for the purpose of a battery monitor?
 #133925  by Neddy
 Fri Oct 27, 2017 1:02 pm
Here you are John. It is important that nothing other than the Shunt is connected to the Battery Negative terminal. This ensures that all battery charge and discharge currents pass through the Shunt and can thus be monitored.

 #133939  by vansvilla
 Fri Oct 27, 2017 6:10 pm
Thanks Neddy.
 #133954  by Zukiwi
 Fri Oct 27, 2017 7:41 pm
RedBarrell wrote:Synthesis?
And why not? Probably best to keep your posts on topic.
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