Solar wiring - Page 2 - Fiberglass RV

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Old 09-07-2016, 10:27 AM   #15
Senior Member
Name: John Michael
Trailer: Scamp 13
Madison, Wisconsin
Posts: 424
Originally Posted by John Linck View Post
Conductor size over such short distances makes very little difference at these low amperages. Just use #12 wire and you will be fine. Line losses pale in comparison to poor orientation, shading losses or lack of LED lights.
Got to thinking about my statements above. They apply to most 12 volt circuits in your trailer, but not to a large inverter if you have one. These 1000-3000 watt beasts can really suck the battery amps. Most Scamp circuits do well with 10 amp (or less) fuses. Some large inverters need 100 amps or more. Now we are talking large heavy copper wires and very short runs. Follow the manufacturer's instruction and be careful with online forum arm chair advice.

OTOH if you have a small inverter (<100 watts) for your phone/laptop charging a 10 amp fused circuit is probably enough. Remember, Volts X Amps = Watts so a 100 watt 12 volt inverter will draw as much as 8.5 amps, usually less.

Good camping, john

John Michael Linck - Toymaker
Camping since 1960 - Scamp 13' Oak
Subaru Outback 4 cyl cvt
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Old 09-08-2016, 11:13 AM   #16
Senior Member
Name: Francois
Trailer: Bigfoot
British Columbia
Posts: 676
for instance....

and little 150W portable inverter has a built-in fuse inside the plug.... and it specs an 8A.....YMMV
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