6.1/10
Jackery SolarSaga 100 Prime Portable Solar Panel
Jackery
25% conversion — the most watts per square foot we track.
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Solar panels · efficiency explained
Solar panel efficiency, explained
Efficiency is the most quoted and least understood number on a portable panel. In our tracked set it runs to 25% — here's what those points buy in the field.
Affiliate disclosure: this guide contains links to Amazon. If you buy through them we may earn a commission at no extra cost to you. Rankings here are computed from official specs and owner-review counts — commissions never enter the formula.
The shortlist
The efficiency leaders
Top of the efficiency table, plus score and output leaders.
9.0/10
Jackery SolarSaga 200W Bifacial Portable Solar Panel
Jackery
Highest weighted score in the category — 9/10.
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6.0/10
BLUETTI PV200 200W Portable Solar Panel for Power Station
BLUETTI
200 W rated — raw recharge speed leader.
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Bought from the merchant, backed by their warranty and returns — details in our Disclaimer →
All 11 models
Every contender, card by card
One card per model — official image, 0–10 data score, key specs. Cards are sorted by score; flip the order with the control below.
Bought from the merchant, backed by their warranty and returns — details in our Disclaimer →
6.1/10
Jackery
Jackery SolarSaga 100 Prime Portable Solar Panel
- 25Efficiency (%)
- 100Rated (W)
- IBC monocrystalline bifacialCell Type
9.0/10
Jackery
Jackery SolarSaga 200W Bifacial Portable Solar Panel
- 25Efficiency (%)
- 200Rated (W)
- TOPCon monocrystalline bifacialCell Type
6.9/10
Renogy
Renogy 200W 12V Portable Solar Panel Suitcase with Waterproof 20A Voyager Charge Controller
- 25Efficiency (%)
- 200Rated (W)
- N-Type monocrystalline (Grade A+)Cell Type
6.8/10
Anker
Anker SOLIX PS100 Bifacial Portable Solar Panel 100W
- 25Efficiency (%)
- 100Rated (W)
- N-type bifacialCell Type
5.7/10
Jackery
Jackery SolarSaga 100 Bifacial Portable Solar Panel
- 24.3Efficiency (%)
- 100Rated (W)
- Monocrystalline bifacialCell Type
2.6/10
ZOUPW
ZOUPW 100W Portable Solar Panel, Foldable Solar Charger with QC3.0 USB-A & Type-C Output
- 23.5Efficiency (%)
- 100Rated (W)
- Monocrystalline PERCCell Type
6.0/10
BLUETTI
BLUETTI PV200 200W Portable Solar Panel for Power Station
- 23.4Efficiency (%)
- 200Rated (W)
- Monocrystalline (ETFE laminated)Cell Type
4.3/10
EcoFlow
EF ECOFLOW 110W Portable Solar Panel, Foldable with Carry Case
- 23Efficiency (%)
- 110Rated (W)
- MonocrystallineCell Type
2.5/10
FlexSolar
FlexSolar 100W Portable Solar Panel Charger with PD3.0 USB-C, QC3.0 USB-A & DC, IP67
- 23Efficiency (%)
- 100Rated (W)
- MonocrystallineCell Type
4.2/10
Jackery
Jackery SolarSaga 100W Air Solar Panel, Bifacial
- 23Efficiency (%)
- 100Rated (W)
- Bifacial PERCCell Type
3.4/10
Goal Zero
Goal Zero Nomad 100 Watt Portable Solar Panel
- 100Rated (W)
- MonocrystallineCell Type
- 10.2Weight (lbs)
The definition
Efficiency = watts from a given area
A 22% panel converts about a fifth of the sunlight hitting it into electricity. Higher efficiency means the same rated watts in a smaller, lighter package — which is why efficiency and portability usually rise together in our table.
The reality
Field output is never the box number
Angle, temperature, haze, and cable losses all take their cut; expect well under rated watts outside lab conditions. Two panels rated identically can still differ in the field — that's why we score the spec but tell you here to plan with margin.
- Morning/evening charging: angle losses dominate — prop the panel, don't lay it flat.
- Hot climates: all silicon panels lose output as they heat; shade the station, not the panel.
The data
Full spec comparison
Sorted by conversion efficiency (%), highest first. Missing specs show as — and are excluded from that model's score with the remaining weights rescaled. Full formula on the methodology page ↗
| Product | Score | Efficiency (%) | Rated (W) | Cell Type | Weight (lbs) | |
|---|---|---|---|---|---|---|
| 6.1 | 25 | 100 | IBC monocrystalline bifacial | 13.23 | Amazon ↗ | |
| 9.0 | 25 | 200 | TOPCon monocrystalline bifacial | 13.67 | Amazon ↗ | |
| 6.9 | 25 | 200 | N-Type monocrystalline (Grade A+) | 28.46 | Amazon ↗ | |
| 6.8 | 25 | 100 | N-type bifacial | 6.2 | Amazon ↗ | |
| 5.7 | 24.3 | 100 | Monocrystalline bifacial | 7.94 | Amazon ↗ | |
| 2.6 | 23.5 | 100 | Monocrystalline PERC | 9.48 | Amazon ↗ | |
| 6.0 | 23.4 | 200 | Monocrystalline (ETFE laminated) | 16.1 | Amazon ↗ BLUETTI ↗ |
|
| 4.3 | 23 | 110 | Monocrystalline | 8.8 | Amazon ↗ | |
| 2.5 | 23 | 100 | Monocrystalline | 4.1 | Amazon ↗ | |
| 4.2 | 23 | 100 | Bifacial PERC | 7.1 | Amazon ↗ | |
| 3.4 | — | 100 | Monocrystalline | 10.2 | Amazon ↗ |
Source: official manufacturer specifications and Amazon owner-rating counts, collected 2026-09-15. No prices, no sponsored placements — ever. Bought from the merchant, backed by their warranty and returns.
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