It depends on your daily power consumption, not the size of your vehicle or vessel. We calculate what your equipment draws over a typical day, factor in how much sun the system will realistically see, then size the panels, charge controller, and battery bank to match with headroom to spare. A fridge and a few lights is a very different system from a communications trailer running around the clock.

Yes, though output drops. Shorter days and heavy overcast mean a system sized only for summer performance will fall behind by December. We account for that up front by sizing conservatively, specifying charge controllers that harvest well in low light, and pairing solar with shore power or alternator charging where it makes sense. For battery maintenance and trickle charging, solar performs reliably year round.

In most cases, yes. We assess your existing batteries, wiring, and charging setup, then integrate solar into it rather than starting from scratch. If the batteries are near the end of their life or the existing wiring won't support what you're planning, we'll tell you before the work starts rather than after.