HQST 100W 12V Rigid
#3 in Under 150 WFull review
The budget pick for a shed, gate opener, small cabin or ground mount where space isn’t tight. On a crowded van roof a smaller N-type 100 W panel is the better fit.
Amazon $49.99$49.99
3.7/5
The panel to buy when a van or RV roof only has a long, narrow gap to fill. Where a standard 100 W panel fits, it costs much less.
- 100 WRated output
- $1.20Price / W
- 23.6 VOpen-circuit voltage
- 12.4 lbWeight
- 10 yearsWarranty
Check price at Amazon$119.99
Price checked October 26, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Only 15.7 in wide, so it fits the narrow strips beside roof vents, AC units and racks on vans and RVs
- 12 V-class voltage charges a 12 V battery through a basic PWM controller
- Light at 12.4 lb, a one-person install, with a 10-year workmanship warranty
Cons
- About $1.20 per watt, close to double the price of a standard-size 100 W panel
- The long, narrow shape gives 19.7% module efficiency, so it needs more roof length than a square panel
- No independent output test yet
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | RS-M100SL25 |
|---|---|
| Output | |
| Rated power | 100 W |
| Module efficiency | 19.7% |
| Claimed efficiency | 25.1% (maximum cell efficiency; datasheet module efficiency 19.7%) |
| Cells | Monocrystalline (N-type TOPCon, 34 cells) |
| Bifacial | No |
| Electrical | |
| Open-circuit voltage (Voc) | 23.6 V |
| Voltage at max power (Vmp) | 19.6 V |
| Short-circuit current (Isc) | 5.4 A |
| Current at max power (Imp) | 5.1 A |
| Voc temperature coefficient | -0.3%/°C |
| Series / parallel | Yes |
| Connections | |
| Output connector | Solar connectors |
| Build | |
| Weight | 12.4 lb (5.6 kg) |
| Dimensions | 50.0 x 15.7 x 1.2 in |
| Frame | anodized aluminum alloy |
| Glass | 3.2 mm AR-coated tempered |
| Junction box rating | IP67 |
| Warranty | 10 years |
| Output warranty | 25-year limited power output warranty |
| Released | 2025-09 |
Alternatives in this size
JJN 100W 12V Rigid
#4 in Under 150 WFull review
A cheap 100 W panel for a small 12 V system on a van, boat or shed. JJN’s newer N-type 100 W panel is the more efficient choice if the price gap is small.
Amazon $59.99 JJN $59$59
Renogy ShadowFlux 120W Rigid
#6 in Under 150 WFull review
For a van or small RV roof where vents, racks or trees shade part of the panel. With clear sun all day, a standard 100 W panel costs less per watt.
Amazon $116.99$116.99
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