SunPower Flexible 100 Watt Monocrystalline Solar Panel

These panels put out good power for sure but among several other thin film panels I have, these are by far the easiest to clean. These have a nice smooth finish to the exterior. They almost never get dirtier than the thinnest film of dust and a quick wipe or squeegee is all they need to be spotless again. The textured coating of other flexible panels may be great when they’re brand new, but they trap more dust as well and need to be sprayed down more heavily to remove the dirt. Great product.

I have two of these installed on the hardtop of my boat, and will be adding two more. Everything on the web says you can expect 1/4 of the rated output in real life from moncrystalline panels, and 1/3 of the rated power from Sunpower cells. I'm getting better than that so far.I have my two panels connected in series, to a Victron SmartSolar 100/30 MPPT controller, charging a single 12v house battery, (with a jumper to my thruster batteries if I need more capacity).The Victron controller has Bluetooth, and a free phone app that tracks and graphs output. On days at anchor the best day yield was 880 watts over 14 hours. P Max was 130 watts, and V Max was 42.52 volts. This was with a lot of smoke in the air from the forest fires up here in the Pacific Northwest. Each day on my graph is different because when the boat is running, or on shore power, other chargers are doing more than the solar, so at anchor all day is the best gauge of what they will do.When the sun comes up in the morning, you pretty quickly get up to a couple of amps charge at 12v (the mppt controller converts the panel voltage to battery voltage). The peak output is probably about 5-6 hours midday, but you're still getting amps all day long.Shade does affect them, I have the panels lined fore and aft in front of my radar dome, spaced above the hardtop by about 50 small rubber cushions to allow some airspace under the panels. I don't intend to ever walk on them. When a cell is shaded, the combined panel output drops in half.Overall I'm very happy with these panels. As the other reviewer said, smooth panels, easy to keep clean, and very tough in appearance.Update: the picture I added is a sunny day in May in Seattle. 331 watts max output. For four 100 amp panels, that’s pretty darn good.

This 100W flexible panel puts out pretty close to rated power under good conditions, which is 40% better than some other flexible panels of a different brand that I purchased recently. Unfortunately, this panel runs a bit hot. After just a few minutes in full sun, the back side of the panel becomes too hot to touch. I would not mount these on a flammable surface like a canvass boat cover. Of the flexible panels I have used so far, these put out the best power. Some hard panels I have used are a little better, but not much. The backing seems a bit soft & dents easily, but otherwise the panels seem physically robust. I have not had them long enough to comment on durability or weatherproof properties.

Was easy to install.15minutes 10 was cleaning roof. Its my 3rd 100w pannel.

I mounted this to the roof of my camper. I've read that many of these flexible panels go bad from too much heat, then are a pain to peel off your roof if glued down.I used high strength veclro tape to mount this to my camper roof, with safety wire through the grommets as a fail safe. The velcro allows air flow, to hopefully reduce heat buildup, and also allows me to remove the panel for use on another vehicle, or in case of failure. I've had this setup for a few months with no problems, even when driving 80mph down the freeway.I'm pleased with this panel and would buy again.

Output dropped to 18watts full sun after less than a year.

I think these SunPower panels are the best, with a copper backing to the cells that makes them much less likely to crack internally with vibration. But I had a weld separate on the junction box and this supplier after doing their due diligence is doing everything appropriate to get this running again. Well done Expert power Direct!

I've had two panels on the top of my dodger on my sailboat for ever a year now. These are premium panels and well worth the cost, ESPECIALLY when compared to *llpowers and others available here. After two years the *llpowers solar panels are faded, cloudy, and the junction boxes are a joke. The Sunpower panels have IP67 rated junction boxes and the quality shows. Don't waste your money on crap, buy these.