Planning solar for an RV or campervan roof? Flexible solar panels appeal to travelers who want a thin, lightweight module that can follow a gently curved surface. The important work happens before mounting: checking roof space, safe curvature, your battery and controller, and the route for wiring.
This guide uses the Sunvivae 200W Flexible Solar Panel Kit as an example. It contains two separate 100W panels, giving 200W of combined rated capacity under test conditions. It is a panel set, not a complete battery charging system.
Quick answer: what should you check before buying flexible RV solar panels?
- Roof area: Measure clear mounting space for each panel and leave room for obstructions, wiring and suitable installation clearance.
- Surface curve: Check the panel's minimum bending radius. Flexible does not mean foldable.
- Electrical design: Match panel voltage and current, wiring configuration, controller ratings and battery charging requirements.
- Installation: Choose mounting and cable routing suitable for the roof, vehicle movement, wind and heat management.
- Package contents: Confirm which parts are included; plan separately for the controller, battery, mounting materials and any extra connectors or cable.
How flexible are these panels?
Each Sunvivae panel measures approximately 36.22 × 23.22 × 0.12 in (920 × 590 × 3 mm), weighs about 4.4 lb (2.0 kg) and has a specified minimum bending radius of 17.7 in (450 mm). That allows mounting on compatible gently curved surfaces. Do not fold, crease, step on or bend a panel tighter than its stated limit. Check the actual roof contour rather than judging by appearance alone.
A low profile can be useful where a rigid framed module would be inconvenient. Roof shape and material still determine whether a particular installation is suitable. Plan for a secure mounting method, the manufacturer's installation guidance and local conditions; professional installation is recommended.
Do two 100W panels provide 200W all day?
No. The 200W figure is the combined rated maximum under standard test conditions. Real output changes with sunlight, shade from vents or roof racks, season, angle, temperature, cleanliness and system losses. For trip planning, estimate your daily energy use in watt-hours and leave margin for poorer solar conditions. Do not size an essential power system around uninterrupted peak output.
What else does an RV battery setup need?
Solar panels produce electricity when illuminated but do not store it. A battery charging setup needs a compatible solar charge controller and battery. The controller regulates charging according to the battery chemistry and system design. Do not connect the panels directly to a battery.
For reference, each Sunvivae 100W panel is listed at 18.6V open-circuit voltage (Voc), 15.9V maximum-power voltage (Vmp), 6.6A short-circuit current (Isc) and 6.29A maximum-power current (Imp). These are per-panel figures, not totals for the set. A qualified installer should check the controller's permitted PV voltage and current, including how the chosen wiring arrangement and operating conditions affect them.
Series or parallel for a 12V RV system?
There is no universal wiring choice. For a 12V battery bank, the product page notes that the panels are commonly wired in parallel; the correct design still depends on the charge controller and battery system. In series, panel voltages add. In parallel, panel currents add. Both the electrical limits and the appropriate connectors and protection must be checked before installation. Never exceed a controller's maximum PV input voltage or current.
As a simple comparison using the listed panel specifications, two identical panels would have a nominal combined Vmp of about 31.8V in series or a nominal combined Imp of about 12.58A in parallel under their rated conditions. These calculations are illustrative, not a wiring instruction or a substitute for checking cold-weather Voc and the controller manual.
What does the package include?
This listing describes two independent pre-wired 100W flexible panels. The product page says a charge controller, battery, mounting materials, extension wiring and branch connectors are not included unless expressly stated in the selected package. Check the current package details before ordering the remaining parts.
The panels have an ETFE front surface, a TPT backsheet, pre-drilled eyelets and an IP67-rated junction box. The IP67 rating applies to the junction box as stated on the product page; it does not make the complete installed system submersible. Connections and cable entries need correct sealing.
Frequently asked questions
Can an RV owner install these directly on a 12V battery?
No. If you are building a 12V RV battery system, use a correctly specified solar charge controller and verify your battery chemistry and charging requirements. Ask a qualified installer to check the complete wiring design if you are unsure.
Will they fit a curved campervan roof?
They are intended for suitable gently curved surfaces, subject to a minimum bending radius of 17.7 in (450 mm). Measure your roof's usable area and actual curve, then choose a mounting method appropriate to the vehicle.
Are both panels together rated at 100W or 200W?
The set contains two panels rated at 100W each, for 200W combined rated capacity. Outdoor output varies with conditions and system losses.
Is an IP67 junction box enough to make the whole RV installation waterproof?
No. The rating describes the junction box. The mounting method, connectors and roof cable entry also need appropriate weather protection.
What if roof vents shade one of the panels?
Shade can reduce output, sometimes substantially. Map where vents, racks and accessories cast shadows during the day before deciding where both panels will go.
Plan the system before mounting
Start with your daily energy needs, roof measurements, battery details and charge controller specifications. Then review the full dimensions and per-panel electrical data for the Sunvivae 200W Flexible Solar Panel Kit. For a compatibility question, contact Sunvivae with your battery, controller and intended installation details.