Florida RV Solar: A No-BS Guide to What Actually Works

Why Florida is great for RV solar

Florida averages 5-6 peak sun hours per day, which is solar-design-language for "good but not desert good." That's enough to run a 600W system and recover 200-300Ah of lithium battery capacity per day, which covers most snowbird and weekend-warrior use cases without ever firing the generator.

The big advantage Florida has over the southwest desert: less temperature stress on panels and batteries. Lithium batteries don't love 110°F days, and panel output drops at high temps. Florida's mid-90s peaks are well within tolerance. Arizona is technically sunnier but harder on equipment.

The disadvantage: cloud cover and afternoon thunderstorms. You'll have days where solar production drops to 20-30% of normal. Plan for that in your battery capacity, or be prepared to run the generator on bad days.

What size system you actually need

Solar sizing depends on what you run. Light off-grid use (lights, fan, fridge gas-side, water pump): 200W is plenty. Medium use (lights, fan, fridge electric, charging laptops, occasional TV): 400-500W. Heavy use (residential fridge, AC for some hours, microwave occasionally, multiple devices): 600-800W with a real lithium bank.

The trick is matching solar to battery. A 600W panel array with a 200Ah lithium bank is wasted - you can't store all that production on a sunny day. A 200W panel with a 600Ah lithium bank is also wasted - panels can't recharge that bank in a day. We size both together.

Most folks oversize panels and undersize battery. The right ratio is roughly 1 watt of panel per 1Ah of lithium for daily-cycle use. So 400Ah of lithium wants about 400W of panels.

What gear actually works

Three brand families dominate RV solar and we trust all three. Renogy is the budget choice - reliable, well-supported, but not the absolute best efficiency. Victron is the premium choice - excellent components, app integration, and lifetime warranties. Battle Born is the lithium battery champion - more expensive than budget batteries but rock-solid and warranties they actually honor.

Avoid: cheap eBay panels (the wattage ratings are inflated), no-name MPPT controllers (they fry), and lithium batteries from Amazon-only brands (warranty is your problem). Pay for quality. Solar lasts 15-20 years if you buy right.

MPPT vs. PWM - the only thing you need to know

Skip PWM controllers. They're cheap and lose 20-30% of solar production in conversion. Get an MPPT controller (Maximum Power Point Tracking). The cost difference is $150-$300 and the performance difference is huge.

Victron SmartSolar 100/30 or 100/50 is the sweet spot for most RV systems. Renogy Rover MPPT is the budget alternative. Both work well, both have Bluetooth apps for monitoring.

Do not skip MPPT. We've seen too many DIY systems with PWM controllers that produced half what they should. The owner couldn't figure out why solar wasn't recharging the bank, and the answer was always the controller.

Lithium vs. lead-acid for solar

If you're going solar, you want lithium batteries. Lead-acid wastes solar production because of charge curve - you can only effectively use about 50% of lead-acid capacity (anything below 50% damages the batteries). Lithium uses 80%+ effectively.

That means a 200Ah lithium bank gives you about 160Ah of usable capacity. A 200Ah lead-acid bank gives you about 100Ah usable. Lithium costs more per Ah upfront but lasts 3-4x as long, accepts faster charging, and gives you more usable capacity. The math is in favor of lithium for solar use cases.

Exception: if you only run small loads occasionally (just lights and water pump on weekend trips), lead-acid is still fine. Don't over-engineer.

What a real install looks like

A typical 600W lithium system on a Class A or fifth wheel: three 200W panels mounted to the roof with VHB tape and rivets, MC4 connectors and 10 AWG wire down through a sealed roof penetration, a Victron SmartSolar 100/50 MPPT charge controller in the bay, two 200Ah Battle Born lithium batteries in the battery bay, a 2000W Victron MultiPlus inverter/charger, and a battery monitor at the panel.

Install time: 1.5-2 days for full system. Cost: $4,250-$5,800 with all gear and labor. Done at your driveway or storage facility, not in our shop.

What this gets you in real life

A 600W lithium system in Florida lets most snowbirds and weekend warriors boondock indefinitely - production matches consumption on most days. You can run a residential fridge, a few lights, a small inverter for charging electronics, and a fan all day every day without ever needing shore power or generator.

What it doesn't do: run AC for more than an hour or two. AC is the killer load. To run AC off solar/battery, you need 1000W+ of panels and 600Ah+ of lithium - and you still won't run it overnight. AC is what generators are for.

What else you get: silent power. No generator noise, no fuel storage, no maintenance. Just sun in, power out. That alone is worth a lot for the boondocking lifestyle.

Got questions about your rig? Text a photo to (866) 437-4848 - one of us will take a look and tell you straight. - Earl