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ago in RV Electrical and Plumbing by (2.1k points)
I’m putting together a starter solar setup for my RV, and I’m getting lost comparing all the different kits out there. I only want enough power for lights, phone charging, fans, and maybe a small 12V fridge later, but I’m not sure whether I should buy a cheap all-in-one kit or piece the system together myself. If you’ve already built a beginner RV solar setup, could you share which kit you chose and what you wish you had known before buying?

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For a starter RV solar setup, the right kit usually depends less on brand hype and more on how you actually camp. If you mostly do weekend trips, stay in sunny areas, and only need to keep batteries topped off for lights, fans, and charging devices, a small kit in the 200 to 400 watt range can make sense. If you plan to run a 12V fridge, boondock more often, or camp under trees, you’ll want to think bigger and be more careful about battery capacity, not just panel size.

A lot of beginners get pulled in by kits that look complete because they include panels, charge controller, and cables in one box. That can be convenient, but “complete” does not always mean “good value” or “right size.” I’d pay close attention to whether the kit uses a PWM or MPPT charge controller. For an RV, MPPT is usually the better choice if the budget allows, especially when your roof space is limited and you want more efficient charging. With the same panels, MPPT often gives you better real-world performance, particularly in cooler weather or when the sun is not perfect.

I’d also think about your battery bank before buying panels. Solar is only part of the system. If you have one small battery, a big panel kit may not help much. If you are starting from scratch, many people do better with a modest panel kit paired with at least one quality deep-cycle battery or, better yet, a lithium battery if the budget supports it. For a basic starter setup, a 100Ah battery and 200 to 300 watts of solar can work well for light use. If you want more comfort and fewer generator runs, going up to 400 watts or more is often worth it.

Another thing that matters is the roof layout. A flexible panel might sound appealing, but rigid panels usually last longer and handle heat better. On an RV roof, mounting flexibility matters too. If you have vents, AC units, or skylights, you may need two smaller panels instead of one large one. Don’t forget wire gauge, fuse protection, and a way to monitor battery voltage and charging current. A cheap kit that leaves out these basics can turn into a headache later.

If I were choosing a first kit, I’d look for a reputable MPPT-based system, rigid panels, decent mounting hardware, and clear upgrade room. I’d avoid buying the smallest kit just because it is cheaper, since many RV owners end up replacing it within a season. If you share your roof size, battery type, and whether you plan to use a fridge, people can usually help narrow it down to a practical wattage range.
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