Callsun 200W (2 x 100W) 2-Pack
#16 in 150 W and upFull review
A good-value pair of compact 100 W panels for a van, small RV or boat where roof space comes in odd shapes. Pair it with an MPPT controller to get the full output.
Amazon $129.99$129.99
The Callsun 200W (2 x 100W) 2-Pack is the better rigid solar panel overall, rated 4.3 to 2.5. The Callsun 200W (2 x 100W) 2-Pack leads on value and durability. The Callsun 200W (2 x 100W) 2-Pack costs $190 less ($129.99 vs $319.99).
Go Power Overlander-E 200W
#61 in 150 W and upFull review
For expanding a Go Power Overlander system where matching hardware matters. For a new system, other 200 W panels cost far less.
Amazon $319.99$319.99
Prices were last checked October 26, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Callsun 200W (2 x 100W) 2-Pack for value ($0.65 per rated watt vs $1.60 per rated watt) and durability (IP68, 10-year warranty vs IP67).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 150 W and up rigid solar panel; a clear win is highlighted. How we rank explains each one.
| Factor weight | Callsun 200W (2 x 100W) 2-Pack | Go Power Overlander-E 200W |
|---|---|---|
| Overall rating | 4.3/5 | 2.5/5 |
| Value 45% | 81 $0.65 per rated watt | 0 $1.60 per rated watt |
| Tested output 15% | 50 not yet independently tested (neutral score used) | 50 not yet independently tested (neutral score used) |
| Durability 25% | 100 IP68, 10-year warranty | 40 IP67 |
| Efficiency 15% | 78 21.9% module efficiency (from size and rated power) | 70 21.5% module efficiency |
Specifications
| Callsun 200W (2 x 100W) 2-Pack | Go Power Overlander-E 200W | |
|---|---|---|
| Output | ||
| Rated power | 200 W | 200 W |
| Module efficiency | 21.9% (rated power over panel area) | 21.5% |
| Claimed efficiency | 25% (as published on Callsun's product page and Amazon; the user manual's table gives 25.6% cell efficiency) | 21.5% (module efficiency) |
| Cells | Monocrystalline (N-type, 16BB) | Monocrystalline |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 26 V | 24.3 V |
| Voltage at max power (Vmp) | 22.7 V | 20.8 V |
| Short-circuit current (Isc) | 4.6 A | 10.1 A |
| Current at max power (Imp) | 4.4 A | 9.6 A |
| Voc temperature coefficient | -0.2%/°C | -0.3%/°C |
| Series / parallel | Yes | Yes |
| Connections | ||
| Output connector | Solar connectors | MC4 |
| Cables included | - | MC4 branch connectors, Mounting hardware |
| Build | ||
| Weight | - | 26.4 lb (12 kg) |
| Dimensions | 31.1 x 22.8 x 1.2 in (each panel) | 59.1 x 26.3 x 1.6 in |
| Frame | anodized aluminum alloy | anodized aluminum (clear or black) |
| Glass | 3.2 mm tempered | tempered low-iron |
| Junction box rating | IP68 | IP67 |
| Warranty | 10 years | - |
| Output warranty | 84.5% output after 25 years | 25-year power output warranty |
| Released | - | 2023-03 |