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The short answer on 400w vs 600w solar panel: choose 400W if you want a lighter, often foldable panel that suits a mid-size power station or a single-panel mount, and choose 600W if you have a large power station and the space to use the extra watts. We compared two 400W and two 600W listings on what each listing states: rated power, efficiency, voltage, weight, weather codes, certifications and warranty. The ECOBOSS 600W set states the strongest certifications and warranty terms, while the ALLPOWERS SP037 is the most complete 400W folder.
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400W vs 600W solar panel: side by side
| 400W vs 600W | ECOBOSS 3x200W N-Type | ALLPOWERS SP037 400W | ALLPOWERS SP039 600W | DOKIO DSP400M 400W | Amazon |
|---|---|---|---|---|---|
| Side | 600W solar panel | 400W | 600W solar panel | 400W | |
| Rated power | 600W (3 x 200W) | 400W | 600W | 400W | |
| Cell type | N-type monocrystalline | Polycrystalline stated | Monocrystalline | Monocrystalline | |
| Efficiency stated | 25.8% | 22% | 23% | High, no figure | |
| Voltage stated | 20.84V per panel | 37.5V | 44V | 31V in title, 12V in spec table | |
| Weight | 71.9 lb set, 23.8 lb each | 40.8 lb | 27.5 lb | 49.4 lb | |
| Foldable | No, rigid panels | Yes, 5 panels | Yes, 6 panels | No, rigid panel | |
| Weather code | IP68 | IP67 | IP67 | Sealed box, no IP code | |
| Certifications | TÜV, IEC 61215, IEC 61730, UL 61730 | None stated | None stated | None stated | |
| Warranty | 10-yr support, 25-yr performance | 24-month | Not stated | ‘5’ with no unit |
Specifications are manufacturer rated as listed, collected 21 October 2026.
Power and efficiency
The two 600W examples are the ECOBOSS set of three 200W panels and the ALLPOWERS SP039 folder; the two 400W examples are the ALLPOWERS SP037 folder and the DOKIO DSP400M rigid panel. On stated efficiency, the ECOBOSS example lists 25.8% for its N-type cells, the SP039 example lists 23% and the SP037 example lists 22%, while the DOKIO example claims high efficiency without a figure. On voltage, the SP039 example states 44V, the SP037 example states 37.5V with a 10.6A working current, the ECOBOSS example states 20.84V per panel for 12V systems, and the DOKIO title says 31V while its spec table says 12V. The listings do not describe the same measurement in the same way, so treat voltage as a per-listing detail, not a side-vs-side win.
Weight and portability
This is the clearest gap, and it runs against the wattage. The 600W ALLPOWERS SP039 folder weighs 27.5 pounds and folds to 23.6 by 35.7 by 1.9 inches; the listing claims it is lighter than typical 400W panels, which it says weigh over 30 pounds. The 400W ALLPOWERS SP037 weighs 40.8 pounds, and the 400W DOKIO weighs 49.4 pounds as a rigid panel. The ECOBOSS 600W set is three rigid panels at 23.8 pounds each, 71.9 pounds together. If the panel must be carried and folded regularly, the folder type matters more than the wattage.
Build, weather codes and certifications
Both ALLPOWERS folders state IP67. The ECOBOSS set states IP68 plus TÜV certification to IEC 61215, IEC 61730 and UL 61730, the only third-party certifications stated in this group. The DOKIO example states a sealed junction box, tempered glass and an aluminum frame with no IP code and no certification. Only the IP codes are checkable across the listings; the ECOBOSS IP68 is the strongest code stated here.
What the listings leave unclear
The DOKIO spec table lists 12V maximum voltage against a 31V title, and its warranty description reads only “5” with no unit, so no warranty term can be confirmed. The ALLPOWERS SP037 bullets list a folded size of 41.3 by 104 by 2.5 inches while its spec table lists 41.25 by 20.94 by 2.5 inches. The ECOBOSS spec table lists a 1-year manufacturer warranty against bullets that state 10-year technical support and a 25-year performance warranty. The SP039 states no warranty term at all. See our Renogy vs DOKIO panel kit comparison comparison for another panel head-to-head.
Four examples
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 |  ECOBOSS 3x200W N-Type | 9.8/10 | Buy on Amazon |
| 2 |  ALLPOWERS SP037 400W | 9.7/10 | Buy on Amazon |
| 3 |  ALLPOWERS SP039 600W | 9.6/10 | Buy on Amazon |
| 4 |  DOKIO DSP400M 400W | 9.5/10 | Buy on Amazon |
ECOBOSS 3x200W N-Type
A 600W set of three 200W N-type monocrystalline panels with TÜV certification and a 25-year performance warranty stated.
Pros
- TÜV certification to IEC 61215, IEC 61730 and UL 61730 stated
- 25.8% efficiency stated, the highest here
- IP68 stated, the strongest weather code here
- 10-year technical support and 25-year performance warranty stated
Cons
- Spec table says 1-year manufacturer warranty, contradicting the bullets
- 71.9 pounds for the set, the heaviest here
- Three rigid panels need more roof or yard space than a folder
- Listed for 12V systems only
Detailed Review
The listing states three 200W N-type monocrystalline panels for a 600W total, 25.8% efficiency, 16BB cell technology, TÜV certification to IEC 61215, IEC 61730 and UL 61730, an IP68 code, tempered glass, a corrosion-resistant aluminum frame and pre-drilled mounting holes. Each panel is listed at 52.8 by 30.3 by 1.18 inches and 23.8 pounds, with the set at 71.9 pounds. The bullets state 10-year technical support and a 25-year performance warranty, while the spec table lists a 1-year manufacturer warranty; we trusted the bullets.
Who it's for: buyers who want a fixed 600W array with the strongest certification and warranty statements in this group. Who should skip it: anyone who needs a panel that folds away after use.
Its Solar Score of 9.8/10 comes from performance 33/35, build 22/25, value 20/25, safety 8/10 and warranty 5/5: 88 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Power | 600W, 3 x 200W |
|---|---|
| Efficiency | 25.8% N-type mono |
| Certification | TÜV IEC 61215, IEC 61730, UL 61730 |
| Panel size | 52.8 x 30.3 x 1.18 in, 23.8 lb |
Figures as published on the retailer listing, collected 21 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. TÜV certification to IEC 61215, IEC 61730 and UL 61730 stated, plus IP68, so safety scores 8 of 10. 10-year technical support and 25-year performance warranty stated, so warranty scores 5 of 5. See How We Pick.
Panels make voltage in daylight. Keep connectors covered until you connect them, check the panel's stated open circuit voltage and current against your controller or power station input limits, and use cables rated for the current. Roof and permanent mounts belong to a qualified installer.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
ALLPOWERS SP037 400W
A 400W foldable panel with IP67, a 10.6A working current and a 24-month warranty, suited to RV travel and camping.
Pros
- 400W portable output with 10.6A max working current stated
- 22% efficiency stated
- IP67 stated
- 24-month warranty and 5 foldable panels
Cons
- 40.8 pounds, the heaviest folder here
- Bullets list folded size 41.3 x 104 x 2.5 in, spec table lists 41.25 x 20.94 x 2.5 in
- Bullets and spec table call the cells polycrystalline despite the high-efficiency headline
- No certification beyond IP67 is stated
Detailed Review
The listing states a 400W foldable panel (±5%), 22% cell efficiency, IP67, a maximum working current of 10.6A, a maximum voltage of 37.5V, MC4 connectors and a 24-month warranty, with a solar-to-XT60 cable and solar-to-DC cables in the box. Two contradictions: the bullets list a folded size of 41.3 x 104 x 2.5 inches while the spec table lists 41.25 x 20.94 x 2.5 inches, and the bullets and spec table describe the cells as polycrystalline while the headline promises a high-efficiency solar cell. The panel weighs 40.8 pounds.
Who it's for: campers and RVers who want 400W that folds away and carries an IP67 code. Who should skip it: anyone who wants a rigid panel for a permanent roof mount.
Its Solar Score of 9.7/10 comes from performance 30/35, build 21/25, value 20/25, safety 7/10 and warranty 4/5: 82 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Power | 400W, 10.6A, 37.5V |
|---|---|
| Efficiency | 22% stated |
| Weather | IP67 stated |
| Weight | 40.8 lb |
Figures as published on the retailer listing, collected 21 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP67 stated, ETFE coating over EVA and glass fiber layers, so safety scores 7 of 10. 24-month warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 of 5. See How We Pick.
Panels make voltage in daylight. Keep connectors covered until you connect them, check the panel's stated open circuit voltage and current against your controller or power station input limits, and use cables rated for the current. Roof and permanent mounts belong to a qualified installer.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
ALLPOWERS SP039 600W
A 600W foldable panel with 44V output and IP67 at 27.5 pounds, suited to large power stations.
Pros
- 600W from 6 foldable panels with 44V output stated
- 23% monocrystalline efficiency stated
- IP67 stated
- 27.5 pounds, the lowest stated 600W weight here
Cons
- No warranty term is stated
- Listing claims typical 400W panels weigh over 30 pounds, a claim about other makers' products
- No controller guidance is stated for the 44V output
- Folded size of 23.6 x 35.7 x 1.9 inches still needs storage space
Detailed Review
The listing states a 600W foldable panel with six panels, 44V output, 23% monocrystalline efficiency, IP67, a folded size of 23.6 by 35.7 by 1.9 inches and a weight of 27.5 pounds, with a solar-to-XT60 cable and a 1.5m extension cable in the box. It claims to be lighter than typical 400W panels, which the listing says weigh over 30 pounds; that is the maker's claim about other products. No warranty term is stated.
Who it's for: power-station owners who want the most watts in a folding package. Who should skip it: anyone who wants a written warranty term or a rigid roof panel.
Its Solar Score of 9.6/10 comes from performance 32/35, build 21/25, value 21/25, safety 7/10 and warranty 0/5: 81 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Power | 600W, 44V |
|---|---|
| Efficiency | 23% monocrystalline |
| Weather | IP67 stated |
| Folded | 23.6 x 35.7 x 1.9 in, 27.5 lb |
Figures as published on the retailer listing, collected 21 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP67 stated, EVA and fiberglass layers, so safety scores 7 of 10. No warranty term, so warranty scores zero. See How We Pick.
Panels make voltage in daylight. Keep connectors covered until you connect them, check the panel's stated open circuit voltage and current against your controller or power station input limits, and use cables rated for the current. Roof and permanent mounts belong to a qualified installer.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
DOKIO DSP400M 400W
A 400W rigid monocrystalline panel with tempered glass and a 9.84 ft cable, suited to fixed shed, cabin or yard mounts.
Pros
- 400W rigid panel with tempered glass and aluminum frame
- Pre-drilled holes and a 9.84 ft MC4 cable included
- 31V monocrystalline stated in the title
- Sealed junction box stated
Cons
- Spec table says 12V maximum voltage, contradicting the 31V title
- Warranty description reads only '5' with no unit
- 49.4 pounds, heavier than the 400W folder
- No efficiency figure or weather code stated
Detailed Review
The listing states a 400W monocrystalline panel at 31V in the title, with tempered glass, an aluminum frame, pre-drilled holes, a sealed junction box and a 9.84-foot MC4 cable, measuring 44.6 by 1.2 by 67.8 inches at 49.4 pounds. Two problems: the spec table lists maximum voltage as 12 volts against the 31V title, and the warranty description reads only '5' with no unit, so no warranty term can be confirmed; we trusted the title for voltage and treated the warranty as unstated.
Who it's for: buyers who want a rigid 400W panel for a shed, cabin or yard mount. Who should skip it: anyone who wants a stated warranty term or a panel that folds away.
Its Solar Score of 9.5/10 comes from performance 28/35, build 21/25, value 20/25, safety 3/10 and warranty 0/5: 72 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Power | 400W, 31V in title |
|---|---|
| Build | Tempered glass, aluminum frame |
| Cable | 9.84 ft MC4 |
| Size | 44.6 x 1.2 x 67.8 in, 49.4 lb |
Figures as published on the retailer listing, collected 21 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Sealed junction box, tempered glass and aluminum frame stated, so safety scores 3 of 10. No warranty term, so warranty scores zero. See How We Pick.
Panels make voltage in daylight. Keep connectors covered until you connect them, check the panel's stated open circuit voltage and current against your controller or power station input limits, and use cables rated for the current. Roof and permanent mounts belong to a qualified installer.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
Where the points went
The Solar Score weighs performance, build, value, safety and warranty. For panels, safety means certifications, weather codes and stated protections; the ECOBOSS set leads here with TÜV and UL certification statements plus IP68, while the DOKIO states only a sealed junction box. Two of the four listings state a warranty term. How we pick explains the weights.
| Product | Solar Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| ECOBOSS 3x200W N-Type | 9.8 | 33 | 22 | 20 | 8 | 5 |
| ALLPOWERS SP037 400W | 9.7 | 30 | 21 | 20 | 7 | 4 |
| ALLPOWERS SP039 600W | 9.6 | 32 | 21 | 21 | 7 | 0 |
| DOKIO DSP400M 400W | 9.5 | 28 | 21 | 20 | 3 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
400w vs 600w solar panel: which should you choose?
Choose a 400W panel for a mid-size power station or a single-panel mount: the DOKIO suits a fixed shed or cabin mount, and the SP037 folds for RV travel. Choose a 600W panel for a large power station with room to spare: the SP039 folder states 44V output aimed at large generators, naming the ALLPOWERS S2000 Pro, R2500 and R4000, and the ECOBOSS set gives three rigid 200W panels with the strongest certification statements here.
| If you need | Look at |
|---|---|
| Most watts in a folder | ALLPOWERS SP039 600W, 27.5 lb |
| Strongest certifications | ECOBOSS 3x200W N-Type, TÜV and UL stated |
| 400W that folds | ALLPOWERS SP037 400W, IP67 |
| Rigid 400W for a fixed mount | DOKIO DSP400M 400W |
Sizing Notes
- Match the panel’s stated voltage to your controller or power station input: 44V on the SP039, 37.5V on the SP037, 31V in the DOKIO title.
- Match total watts to the input the station or controller accepts: 600W needs room for it.
- Count roof or yard space: three 52.8 by 30.3 inch ECOBOSS panels need far more room than one folded SP039.
- Use the cable the listing states: MC4 on the DOKIO and SP037, XT60 on the SP039.
FAQ: power away from the grid
Is a 600W panel always better than a 400W panel?
No. The 600W SP039 folder weighs 27.5 pounds while the 400W SP037 weighs 40.8 pounds, and the 600W ECOBOSS set weighs 71.9 pounds across three rigid panels. Match watts to your power station’s input and your space.
Which panel here states the highest efficiency?
The ECOBOSS set at 25.8% for its N-type cells, then the ALLPOWERS SP039 at 23% and the SP037 at 22%. The DOKIO listing claims high efficiency without a figure.
Which panels fold for transport?
The ALLPOWERS SP037 (5 foldable panels, 40.8 lb) and the SP039 (6 foldable panels, 27.5 lb). The DOKIO and ECOBOSS panels are rigid. See our series vs parallel solar panels guide before wiring more than one.
Which panel states the longest warranty?
The ECOBOSS set, with 10-year technical support and a 25-year performance warranty stated in the bullets. The SP037 states 24 months; the SP039 and DOKIO state no usable term.
Related solar guides
See every Rigid and Flexible Panels guide and all Solar Panels and Kits guides. For the battery side, see the best 12v battery for solar panel, and for high-efficiency options, the best solar panel with high efficiency.
