Go solar on the roof or add one of those bicycle generators that rubs on a wheel to spin
it up for some cheap DC power and feed it to the battery to keep it charged.
Or even better, get one of those MICRO-START XP-3 units and use that as your battery
source. Very small and lithium and it should last long time.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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1980 GS stockport, Fat Nikki, RB Dual Facetfuel pumps, Holley regulator, RB Street port exhaust, 2GDFIS, MR2 MK I electric fans, 2G strut bar, relayed fans, lights and fuel pump, LEDs
Project Fat Nikki Budget 12A rebuild Video setup < $30.00