ALLPOWERS SF-100 — 100W Flexible Solar Panel, ETFE for RVs

For the van, trailer or outbuilding roof where a rigid framed panel will not sit flat: a 100W flexible ETFE panel that follows a curved surface and stays low enough to forget about.

Why it works in a serious garage

• Flexes to follow a curved roof. A rigid panel on a curved van or trailer roof needs a frame, brackets and standoffs, all of which add height, drag and leak paths. A flexible laminate conforms to the surface instead.
• Low profile once mounted. Nothing to catch a low branch, a car wash or a garage door header, and no wind noise. On a daily-driven van that is the difference between a panel that stays on and one that comes off.
• ETFE surface. More light transmission and better UV and dirt resistance than PET-faced flexible panels, which historically degraded fast. ETFE is the reason this class of panel is worth mounting at all now.
• Standard MC4 output. Pairs with the ALLPOWERS R-series and most third-party charge controllers and power stations. No proprietary connector locking you to one system.
• Lightweight enough for a fiberglass or aluminum roof. At 5.29 lb it adds negligible load to a camper shell, a trailer skin or a shed roof.

Specifications

Electrical figures are stated at STC and carry the manufacturer’s ±5% tolerance. Size any array against the tolerance band, not the nominal number.

What’s in the box

• ALLPOWERS SF-100 100W solar panel
• Solar connector to XT60 charging cable
• User manual

Mounting straps, adhesive and brackets are not included — the panel has six perimeter holes and the fastening method is yours to choose.

Shipping & delivery

At 5.29 lb the panel ships standard ground parcel. Panels are flat and comparatively fragile in transit, so inspect the surface and the junction box for cracks or impact marks before you install — damage is much harder to argue once the panel is on a roof.

Frequently asked questions

Which power stations will this work with?
Any station or charge controller whose PV input window covers 30.6V open-circuit and 4.17A. That includes the ALLPOWERS R-series and most third-party units with a standard solar connector. Check your station’s maximum PV voltage before connecting — open-circuit voltage rises in cold weather, so leave headroom above 30.6V.

Can I wire several panels together?
Yes. In series the voltages add and the current stays the same: two panels give roughly 61V open-circuit at 4.17A, three give roughly 92V. In parallel the currents add and voltage stays put: two panels give roughly 30.6V at 8.3A. Series raises voltage to reach a controller’s minimum start voltage; parallel raises current once you are already inside the window. Match your total against your station’s stated PV input limits, and stay well under its maximum voltage.

What does the ETFE surface actually do?
ETFE is a fluoropolymer film used instead of the PET that older flexible panels used. PET yellows and hazes under UV, which is why early flexible panels lost output within a couple of seasons. ETFE holds its transmission far longer, and the honeycomb texture picks up light at shallower angles — useful on a roof that is rarely square to the sun.

How much power will I really get?
The 100W rating is measured at standard test conditions: 1000W/m² irradiance and a 25°C cell. On a real roof expect meaningfully less. Angle to the sun, haze, heat and dust all cost output, and a flat-mounted panel on a van roof rarely sees an ideal angle. Plan an array on realistic daily watt-hours rather than the nameplate figure.

Can I leave it outside permanently?
Yes — the panel is IP68 rated and built for semi-permanent mounting. What still needs care is how you attach it. Bonding a flexible panel directly to a roof traps heat behind the laminate and costs output, and the wrong adhesive can affect the warranty. Confirm the approved fastening method and minimum bend radius with us before committing it to a curved surface.

Build out the rest of the bay

• ALLPOWERS SF-200 200W Flexible Solar Panel — double the output in the same low-profile format.
• Portable power stations — the stations this panel keeps charged. Match the panel to a station’s solar input window before ordering.
• ALLPOWERS SE100 100W Foldable Solar Panel — the portable alternative if you would rather not mount anything.