The JJN 400W (2 x 200W) Bifacial 10BB 2-Pack and the Renogy 400W (2 x 200W) 2-Pack are evenly matched, rated 3.8 and 3.8. The JJN 400W (2 x 200W) Bifacial 10BB 2-Pack leads on value. The Renogy 400W (2 x 200W) 2-Pack wins on durability and efficiency. The JJN 400W (2 x 200W) Bifacial 10BB 2-Pack costs $119.35 less ($215.99 vs $335.34).
A cheap, independently tested 400 W pair for a van, RV or shed on a budget. JJN’s newer N-type 2-pack costs a little more but comes with a full spec sheet and a stated warranty.
Amazon $215.99A simple way to buy 400 W of Renogy’s 200 W panel for an RV roof, shed or ground mount with an MPPT controller. Compare it with two singles first, since the pack is not always cheaper.
Amazon $335.34Prices 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.
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 | JJN 400W (2 x 200W) Bifacial 10BB 2-Pack | Renogy 400W (2 x 200W) 2-Pack |
|---|---|---|
| Overall rating | 3.8/5 | 3.8/5 |
| Value 45% | 91 $0.54 per rated watt | 63 $0.84 per rated watt |
| Tested output 15% | 100 best measured 91% of rated watts (1 test) | 50 not yet independently tested (neutral score used) |
| Durability 25% | 24 IP65 | 84 IP65, 10-year warranty |
| Efficiency 15% | 22 19.1% module efficiency (from size and rated power) | 54 20.7% module efficiency (from size and rated power) |
| Tested by | Measured peak | Of rated | Conditions |
|---|---|---|---|
| OutdoorGearLab | - | 91% | 182 W from one 200 W panel of this model (sold singly as B09VS7PR2J); peak_w left null because the pack is rated 400 W. Sunny California day at 6,500 ft |
No independent test published yet.
| JJN 400W (2 x 200W) Bifacial 10BB 2-Pack | Renogy 400W (2 x 200W) 2-Pack | |
|---|---|---|
| Output | ||
| Rated power | 400 W | 400 W |
| Tested output | 364 W (91%) | - |
| Module efficiency | 19.1% (rated power over panel area) | 20.7% (rated power over panel area) |
| Claimed efficiency | 23% ("up to"; the listing calls it conversion efficiency without saying cell or module) | 25% (cell efficiency; datasheet module efficiency 20.7%) |
| Cells | Monocrystalline (10BB, Grade A cells) | Monocrystalline (N-type, 16BB) |
| Bifacial | Yes | No |
| Electrical | ||
| Open-circuit voltage (Voc) | - | 37.4 V |
| Voltage at max power (Vmp) | - | 31 V |
| Short-circuit current (Isc) | - | 6.8 A |
| Current at max power (Imp) | - | 6.5 A |
| Voc temperature coefficient | - | -0.3%/°C |
| Series / parallel | - | Yes |
| Connections | ||
| Output connector | MC4 | Solar connectors (IP67) |
| Build | ||
| Dimensions | 53.7 x 30.3 x 1.18 in (each panel) | 49.7 x 30.1 x 1.2 in (each panel) |
| Frame | black aluminum | anodized aluminum alloy |
| Glass | tempered | 3.2 mm tempered |
| Junction box rating | IP65 | IP65 |
| Warranty | - | 10 years |
| Output warranty | - | 95% output for 5 years, 90% for 10 years, 80% for 25 years |
| Released | 2026-07 | 2025-08 |
