Short answer: choose the kit size from your daily watt-hours (see the solar calculator), make sure it includes an MPPT controller sized for future expansion, and budget for the parts kits often leave out: fuses, a battery, roof entry, and longer cables.
| Usually included | Often missing or undersized |
|---|---|
| Panels, mounting brackets, MC4 cables, charge controller | Battery, inline fuses/breakers, roof cable entry gland, sealant, longer cable runs, battery monitor, DC-DC charger |
Rigid framed panels run cooler with an air gap and typically last longer; flexible panels are lighter and lower-profile but usually run hotter when glued flat, which reduces output and lifespan. Check each maker's warranty terms for flexible panels.
Safety: These are general estimates, not a design. Follow your equipment manufacturer's instructions and local electrical code, and consult a qualified electrician for anything connected to shore power, a house, or high-current batteries.
Divide your daily Wh by peak sun hours × 0.75. Many weekend campers use 200 W; full-timers often 600–1,200 W.
Usually yes for kits above ~200 W or with series-wired panels; it harvests more energy than PWM.
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