Renogy 100W Bifacial Panel vs Rich Solar MEGA 100 SLIM Panel

• FeaturesRenogy 100W Bifacial Panel: 6 (higher)Rich Solar MEGA 100 SLIM Panel: 3

  Renogy 100W Bifacial Panel

  • IP68 junction box and bifacial cells earn 4 of 8 points
  • Rear face: up to 30 percent extra energy, depending on the surface below, by Renogy's claim
  • Missing: two bypass diodes and no split-cell layout, which Renogy reserves for the 200 W size
  • Conflict: product-page FAQ gives 33.6 V; datasheet gives 28.5 V open-circuit

  Rich Solar MEGA 100 SLIM Panel

  • IP67 junction box and connectors; no diode count or station adapters
  • Build: 3.2 mm AR-coated tempered glass in an anodized aluminum frame
  • Loads: certified for 2400 Pa wind and 5400 Pa snow
• EfficiencyRenogy 100W Bifacial Panel: 4 (higher)Rich Solar MEGA 100 SLIM Panel: 2

  Renogy 100W Bifacial Panel

  • 100 W from 0.50 square meters works out to 20.0 percent
  • Cell figure: the advertised 25 percent is cell efficiency, not module

  Rich Solar MEGA 100 SLIM Panel

  • 19.7 percent computed from 1270 x 400 mm; 25.1 percent cell figure marketed
  • Spec sheet: prints the same 19.7 percent module efficiency
• LifespanRenogy 100W Bifacial Panel: 5Rich Solar MEGA 100 SLIM Panel: 7 (higher)

  Renogy 100W Bifacial Panel

  • 25-year output warranty with no share of output stated at year 25
  • Missing: the SKU is absent from Renogy's warranty schedule

  Rich Solar MEGA 100 SLIM Panel

  • 80 percent of rated output guaranteed at 25 years
• Warranty & SupportRenogy 100W Bifacial Panel: 8 (higher)Rich Solar MEGA 100 SLIM Panel: 6

  Renogy 100W Bifacial Panel: 10 Years · Rich Solar MEGA 100 SLIM Panel: 5 Years.

  Renogy 100W Bifacial Panel

  • 10 years on materials and workmanship

  Rich Solar MEGA 100 SLIM Panel

  • 5 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

Same score

• CapacityRenogy 100W Bifacial Panel: 1Rich Solar MEGA 100 SLIM Panel: 1

  Renogy 100W Bifacial Panel

  • 100 W, the bottom rung for a rigid panel

  Rich Solar MEGA 100 SLIM Panel

  • 100 W rated, on the 100 to 119 W rung
• Operating RangeRenogy 100W Bifacial Panel: 5Rich Solar MEGA 100 SLIM Panel: 5

  Renogy 100W Bifacial Panel

  • Temperature coefficient of Pmax -0.32 percent per °C

  Rich Solar MEGA 100 SLIM Panel

  • -0.35 percent per °C temperature coefficient of Pmax
  • Temperature: rated from -40 to +185 °F
• VerificationRenogy 100W Bifacial Panel: 2Rich Solar MEGA 100 SLIM Panel: 2

  only the Renogy 100W Bifacial Panel: None verifiable; only the Rich Solar MEGA 100 SLIM Panel: Claimed only.

  Renogy 100W Bifacial Panel

  • No certifier directory lists this model
  • Listings: the datasheet lists CE, RCM, TSCA and CA65, with no UL 61730 claim

  Rich Solar MEGA 100 SLIM Panel

  • No record for RS-M100SL25; UL PV listing names MEGA 100, a near-miss
  • 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

Not scored for either

• ValueRenogy 100W Bifacial Panel: —not scoredRich Solar MEGA 100 SLIM Panel: —not scored

• RedditRenogy 100W Bifacial Panel: 7 (higher)Rich Solar MEGA 100 SLIM Panel: 4

  The Renogy 100W Bifacial Panel reading covers the whole brand; the Rich Solar MEGA 100 SLIM Panel reading covers the whole brand.

  Renogy 100W Bifacial Panel

  Read the full summary

  • Durable: an r/OffGrid owner has run several Renogy rigid panels for more than a decade with none failed; an r/vandwellers thread sums it up as panels fine, other gear less so
  • Warranty: an r/VanLife owner's RSP200D lost half its voltage after about 18 months, and Renogy shipped a replacement in two weeks under the 5-year warranty; that poster is quoted on Renogy's own ShadowFlux page
  • Support: an r/SolarDIY buyer of the 200 W suitcase reported a defective charge controller, two wrong replacement parts and dozens of emails before a 20 percent refund (2025)

  Rich Solar MEGA 100 SLIM Panel

  Read the full summary

  • 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)
• GoogleRenogy 100W Bifacial Panel: 6 (higher)Rich Solar MEGA 100 SLIM Panel: 5

  The Renogy 100W Bifacial Panel reading covers the whole brand; the Rich Solar MEGA 100 SLIM Panel reading covers the whole brand.

  Renogy 100W Bifacial Panel

  Read the full summary

  • Footprint Hero: links Renogy panels through Amazon and Renogy's own affiliate program; ranked Renogy's older 100 W mono panel first of five 100 W panels it tested
  • Tests: 71.6 W peak in a December output test (2021) and 570 Wh over 24 hours against 490 Wh from a Newpowa (2023)
  • DIY Solar Forum: a 2022 thread opens with an owner whose Renogy gear still works after a decade
  • Low output: a thread titled 'I only get 85W out of my Two Renogy 100W panels' reports one panel as low as 40 percent of rating and four averaging 54 percent

  Rich Solar MEGA 100 SLIM Panel

  Read the full summary

  • 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)
• YouTubeRenogy 100W Bifacial Panel: 6Rich Solar MEGA 100 SLIM Panel: 6

  The Renogy 100W Bifacial Panel reading covers the whole brand; the Rich Solar MEGA 100 SLIM Panel reading covers the whole brand.

  Renogy 100W Bifacial Panel

  Read the full summary

  • Disclosure: both channels found carry a tie to the panels they review
  • Freedom in a Can: passes on a 10 percent Renogy code through Renogy's affiliate link; found no delamination on two 100 W flexible panels after 9 months and 9,000 miles
  • Johnny's Weekends: earns Amazon commission on the panels it links; found Renogy's 200 W flexible panel performed well but trailed a CIGS panel under shade (2023, about 128,000 views)

  Rich Solar MEGA 100 SLIM Panel

  Read the full summary

  • 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
• AmazonRenogy 100W Bifacial Panel: 7Rich Solar MEGA 100 SLIM Panel: 7

  The Renogy 100W Bifacial Panel reading covers its product line.

  Renogy 100W Bifacial Panel

  Read the full summary

  • Listing: Renogy sells the 100 W, 200 W and 250 W bifacial sizes as variations of one listing on shared ratings
  • Rating: 4.4 from 54 ratings, 76 percent five-star and 7 percent one-star
  • Mostly 250 W: most reviews name the 250 W panel, which was on sale before this one
  • Summary: Amazon's review summary says owners like the build quality while power output draws mixed reports, one owner measuring 170 W from the 250 W panel

  Rich Solar MEGA 100 SLIM Panel

  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