Near-miss: UL QIIA.E553290 lists MEGA 100; QIIA.E549773 lists RS-M100; neither names MEGA 100 SLIM
Claim: page says certified to UL 61730, IEC 61215 and CSA C22.2; no record

Better on verificationRich Solar MEGA 200 12V Panel$239.99Scores 6.0

Warranty & Support65 years of workmanship cover in Rich Solar's FAQ, the shorter of its stated terms

Conflict: warranty page says 10 years, prorated; spec sheet says 25-year product
Proration: 10-year schedule pays in full to year 3, then 5 percent by year 10

Price

List: $129.99 at richsolar.com
Onyx: the all-black RS-M100SLB is $129.99
2-pack: two panels are $259.99

Summary

Narrow 100 W panel, lowest output rung

What it is: a narrow 100 W, 12 V TOPCon glass panel for van, camper and boat roofs with little free width
The trade-off: a 15.8 in width that fits between roof fixtures, but the lowest output rung and under 20 percent module efficiency
Not checked: Rich Solar publishes no bypass diode count
Look elsewhere for: more watts per panel where the roof is wide open

Strengths

Narrow shape for crowded roofs
Long output guarantee
Sealed junction box and connectors
Light for a glass panel
Well rated by Amazon buyers

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Drawbacks

Low efficiency for its footprint
Low output for a rigid panel
Workmanship term differs across Rich Solar's pages
Longer workmanship term is prorated
Bypass diode count not published

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Social score

5.5 out of 10

RedditBrand-level4 out of 10

Scope: few Reddit threads name Rich Solar, and those found are complaints
Battery: an r/SolarDIY owner's new ALPHA 5 read 6.7 V instead of 48 V, and Rich Solar's technician had not returned his call after two days (August 2023)
Order: an r/SolarDIY buyer waited from March for an out-of-stock ground mount, then was told its price had risen from $180 to $699 and cancelled; the refund took months (May 2025)

GoogleBrand-level5 out of 10

Panels: DIY Solar Forum owners of Rich Solar 100 W panels reported them working as rated, one saying eight of them each pushed more than 100 W (August to September 2020)
Defects: an owner of 20 of the 100 W poly panels saw faint snail trails after a summer and found one with a broken diode wire (January 2021)
Controller: another found Rich Solar's MPPT controller OK but its setup and Bluetooth app in need of work (January 2021)
Warranty: a DIY Solar Forum owner reported Rich Solar cut its CIGS panel warranty from 5 years to 1 in 2021 (June 2026); an Escape Forum owner waited six weeks on a warranty claim (August 2024)

YouTubeBrand-level6 out of 10

Will Prowse: in a test of several panels a Rich Solar 200 W mono gave 157 W, 78.5 percent of rating, and a 100 W poly 88 W; he kept the poly first on his list for a small panel (May 2021, about 366,000 views)
Disclosure: Will Prowse states every video includes paid promotion or free product and some links are affiliate links

Amazon7 out of 10

Liked

Power output, tagged positive in 8 reviews
Fits a truck toolbox lid, per one buyer
Output per spec, per one buyer

Complaints

Power, tagged negative in 1 review

Read the full summary

Rating: the MEGA 100 Slim's listing (B0BFC5NY6M) holds 4.8 stars from 28 ratings, 87 percent five-star and none below three stars (October 2026)
Praised: buyers tag power positively in 8 of 9 mentions, one fitting it to a truck toolbox lid with output per spec
Caution: the listing's bullets still give an older 5.52 A figure, so some ratings may predate the current N-type version

User reviewsNot scored

The retailer pool is blank: no US retailer listing carries ten native reviews of a Rich Solar product, and its Walmart listings hold none or one.

Trustpilot

Trustpilot rates richsolar.com 3.2 from 2 reviews, one three-star and one one-star, on a page claimed in October 2023 with no recent invitations (October 2026).

Track record

The BBB rates Rich Solar of Ontario, California an F, not accredited, on 5 complaints closed in three years (October 2026).
No CPSC or Health Canada recall names Rich Solar, searched in October 2026.
Brinkley RV's NHTSA recall 25V042000 (January 2025) replaced an overheating Rich Solar MPPT solar charge controller in up to 1,723 Model G trailers.

Not countedExcluded

Not counted in any pool: the testimonials on richsolar.com, the RICH SOLAR TALK YouTube channel, Rich Solar's Facebook pages and groups, and any brand-run subreddit.
Also not counted: Rich Solar's affiliate program and creator collaborations, dealer pages, and Explorist.life, whose co-branded panel ties it to Rich Solar.

Summary

Brand-level

3.2 on Trustpilot, an F from the BBB

Specs

CapacityNot applicable
AC OutputNot applicable
System VoltageNot applicable
Panel Power100-149 W
Charge CurrentNot applicable
Safety ListingClaimed only
Cell TypeTOPCon (N-type)
Low-Temp ChargingNot applicable
Warranty5 Years
MonitoringNot applicable
Weight12.4 lb

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At a glance

50.0 x 15.8 x 1.2 in
34 cells (2 x 17)
16-busbar cells
35.4 in 12 AWG leads

Company

Rich Solar is the brand of Rich Solar Inc., which says it began in 2005 and keeps its offices and warehouse in Ontario, California.

Where it sells

It sells with a cart at richsolar.com, through a RICH SOLAR Amazon brand store run by the seller SUNRICH ENERGY, on Walmart, and through dealers such as Outbound Power.

Description

The Rich Solar MEGA 100 SLIM (model RS-M100SL25, the 2025 version) is a 100 W, 12 V narrow rigid panel of 34 N-type TOPCon 16-busbar cells in a 2 x 17 layout, with a 0 to +5 W power tolerance.

Its spec sheet rates it at 19.6 V and 5.10 A at maximum power, 23.6 V open-circuit and 5.38 A short-circuit, with a 1000 VDC system maximum and a 15 A series fuse rating. It measures 50.0 x 15.8 x 1.2 in (1270 x 400 x 30 mm) and weighs 12.4 lb (5.6 kg).

The front is 3.2 mm AR-coated tempered glass in an anodized aluminum frame, rated for 2400 Pa wind and 5400 Pa snow loads. An IP67 junction box carries a pair of 12 AWG leads of about 3 ft (900 mm on the spec sheet) with IP67 solar connectors.

Rich Solar markets 25.1 percent cell efficiency, and its spec sheet prints 19.7 percent module efficiency. The all-black MEGA 100 SLIM ONYX (RS-M100SLB) is $129.99, and a 2-pack is $259.99.