300W–370W Solar Panels

300W Solar Panel Options from 300W to 370W: Folding, Rigid and Pallet Buys

A 300w solar panel is the practical middle of the market: large enough that three or four of them run a cabin or a full-time RV, small enough to lift onto a roof alone and to fit between vents and a roof AC. This collection groups the 300W to 370W range so you can compare three different ways to get that output: a folding portable panel for a power station, a rigid 24V module sold in small kits, and a commercial-grade module sold by the pallet.

Three products from Bluetti, Sungold Power and Rich Solar are here, priced from $599 for a single folding panel to $2,199 for a pallet.

How to choose a panel in the 300W to 370W range

• Portable or fixed. The BLUETTI 350W 48V Monocrystalline Portable Solar Panel folds, carries and plugs into a power station with no mounting. The Sungold Power 370W 24V Mono Black PERC Solar Panels Kit is a rigid module for a roof or ground rack, wired to a charge controller or hybrid inverter. If you move camp, fold; if the panel stays put, go rigid and spend less per watt.
• Panel voltage and controller match. The Bluetti is a 48V-class panel meant for a station's solar input. The Sungold Power 370W and the Rich Solar MEGA 335 PRO are 24V modules, which you series-wire into strings for an MPPT controller. Check your controller's maximum input voltage before choosing string length.
• Efficiency per square foot. On a crowded RV roof, efficiency decides how many watts fit. The Bluetti cells run at 23.4%, the Sungold Power PERC module at 20.3%, and the N-type TopCon cells in the RICH SOLAR MEGA 335W 24V Monocrystalline Solar Panels reach 25.1%.
• Quantity. The Sungold Power kit is priced from $845 with larger kit sizes up to $3,890. The Rich Solar MEGA 335 PRO is sold only in pallets of 8, 10 or 12, which suits a cabin array, a barn roof or a small commercial job, not a two-panel van.

Popular picks in this collection

Sizing tips

• Start with the Solar Kit Calculator. Enter your appliances and ZIP code and it tells you how many panel watts your sun hours require, so you know whether a 300w solar panel kit of two is enough or you need six.
• Measure the roof before ordering rigid panels. Vents, the AC shroud and the antenna eat space; count clear rectangles first, then pick the panel that fits the most of them.
• Keep strings uniform. Mix the 370W Sungold Power and the 335W Rich Solar on separate controller inputs, not in the same series string, or the string runs at the weaker panel's current.
• Buy the pallet only if you can receive freight. Pallet orders arrive on a truck and need someone to unload.

Frequently asked questions

What is the difference between a 300W and a 370w solar panel in practice? About 20% more output from the same mounting footprint class. For a four-panel array that is roughly the daily energy of a compressor fridge, which is why the Sungold Power 370W is popular for cabins.

Are these the best 300w solar panels for an RV roof? For a roof that stays with the vehicle, the rigid Sungold Power 370W kit is the practical pick; for a trailer parked in shade, the folding Bluetti PV350 that you carry into the sun wins.

Which 300w solar panels for sale here work with grid-tie inverters? The Sungold Power 370W is described for on-grid, off-grid and hybrid systems, and the Rich Solar MEGA 335 PRO is built for residential and commercial rooftops. The Bluetti folding panel is for power stations only.

Everything here ships free to the mainland US from our brand partner warehouses, usually within a few business days, with 30-day returns. Call us if you want help laying out a string for your controller.