I have a cabin which is running off grid, using a solar panel and a (2*120 Ah 12V) battery.
I now want power in another building 20 meters away. One solution is to use an expensive high gauge (7 mm2)cable, to reduce the voltage drop - but that cable is also much more difficult to hide. I can't bury it without tripling the length.
I will have a bigger battery bank in the other building eventually, but the solar panels will remain on the main building.
When the voltage drops in the cable, is that also wasted Watt-hours? A few lamps will happily run on fewer volts. I am more worried about losing Wh's.
What other alternatives do I have?