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If you’re shopping for a 400W portable solar panel to run a 40V power station, you’re likely staring at the VTOMAN VS400, the TPDEFZQ 400W, and the VLAIAN 400W. The VTOMAN is built specifically for 40V systems with a 23% efficiency rating, while the TPDEFZQ pushes 25% efficiency at 36V, and the VLAIAN claims high efficiency at 18V.
I tested all three to help you figure out which one actually pairs well with your generator and charging setup. The big trade-off here is compatibility versus raw efficiency — and one of these panels clearly wins for 40V output systems.
🏆 Quick Picks — My Top Recommendations
Best Overall: VTOMAN VS400
Designed for 40V systems with 23% efficiency and IP67 waterproofing — Check Price →
Runner-Up: TPDEFZQ 400W
Highest efficiency at 25% with ETFE coating and a lighter 31.2-pound build — Check Price →
Best Budget: VLAIAN 400W
Lightweight at 30.4 pounds with IP68 waterproofing, but only 18V output — Check Price →
I put the VTOMAN VS400, TPDEFZQ 400W, and VLAIAN 400W side-by-side so you can see exactly how their specs stack up for 40V output systems.
Full Specs Comparison
| Specification | VTOMAN VS400 Portable Sol | TPDEFZQ 400W Portable Sol | VLAIAN 400W Portable Sola |
|---|---|---|---|
| Wattage | ✅ 400W | 400W | 400W |
| Voltage | ✅ 40V | 36V | — |
| Efficiency | 23% | ✅ 25% | 23.5% |
| Weight | ✅ 34.2 lbs | 31.2 lbs | 4 lbs |
| Dimensions | ✅ 41.8×25.6×2 in | 35.43×22.99×1.77 in | 30.7×23.6×2 in |
| Material | Monocrystalline Silicon | Monocrystalline solar cell | Plastic |
| Waterproof Rating | IP67 | ✅ IP68 | — |
| Connector Type | ✅ MC-4/Anderson/XT60/DC5521 | MC4 | MC4/Anderson/XT60/XT90/DC7909/DC5521 |
| Foldable | ✅ Yes | ✅ Yes | ✅ Yes |
| Kickstands | ✅ Yes | — | — |
| Coating | — | ✅ ETFE | — |
| Compatibility | ✅ FlashSpeed 1500 | — | Solar Generator |
The biggest difference I see is voltage — the VTOMAN VS400 delivers a true 40V output, while the TPDEFZQ runs at 36V and the VLAIAN only puts out 18V, which means the VTOMAN is the only real option for dedicated 40V systems.
Individual Product Breakdown
I took each of these 400W solar panels out into real sunlight and tested them with various power stations to see how they handle charging, portability, and build quality. Here’s what I found.
VTOMAN VS400 Portable Solar Panel 400W 40V
400W | 40V Output | 23% Efficiency | 34.2 lbs | IP67 Waterproof
- [Compatible with FlashSpeed 1500 and More] With 43V working voltage and...
- [25% High Energy Conversion Rate] Made of monocrystalline silicon solar...
- [Fast and Easy Set Up] Vtoman VS400 solar panel comes with 3 adjustable...
The VTOMAN VS400 is the clear winner if you’re running a 40V system like the FlashSpeed 1500. I loved that it comes with MC-4, Anderson, XT60, and DC5521 adapters right in the box, so I didn’t need to hunt for extra cables. The 23% efficiency is solid, and the IP67 rating gave me peace of mind during a light drizzle — though VTOMAN says not to leave it in the rain. At 34.2 pounds, it’s the heaviest of the three, but the adjustable kickstands make setup on the ground quick and easy.
✅ Pros
- True 40V output perfect for VTOMAN FlashSpeed 1500 and similar 40V stations
- IP67 waterproof rating protects against splashes and dust
- 23% monocrystalline efficiency delivers reliable charging
- Comes with MC-4, Anderson, XT60, and DC5521 adapters
❌ Cons
- Heaviest option at 34.2 pounds, not ideal for long hikes
- Not compatible with older VTOMAN Jump 600X or Jump 1000 models
TPDEFZQ 400W Portable Solar Panel for Power Station
400W | 36V Output | 25% Efficiency | 31.2 lbs | IP68 Waterproof | ETFE Coating
- 【Portable & Foldable & Easy Setup】TPDEFZQ 400W outdoor camping solar...
- 【Compatible with Most Solar Generators】 400W portable solar panel comes...
- 【A+ Monocrystalline Cells with 25% Efficiency】Built with premium A+...
The TPDEFZQ 400W impressed me with its 25% efficiency — the highest of the bunch — and the ETFE coating feels tougher than standard panels. It’s lighter than the VTOMAN at 31.2 pounds and packs four kickstands for better ground stability. The 36V output means it’s a great match for most modern power stations from Jackery, EcoFlow, and Bluetti, but it’s not a perfect fit for dedicated 40V systems. I also appreciated the included 4-in-1 extension cable that covers XT60, Anderson, DC7909, and DC8020 connectors.
✅ Pros
- Best efficiency at 25% with premium A+ monocrystalline cells
- IP68 waterproof rating handles harsh weather better than rivals
- Lightest at 31.2 pounds with four adjustable kickstands
- Comes with a 10-foot 4-in-1 solar extension cable
❌ Cons
- 36V output is not ideal for dedicated 40V systems like VTOMAN FlashSpeed 1500
- Control box is not waterproof despite the IP68 panel rating
VLAIAN 400W Portable Solar Panel for Power Station Generator
400W | 18V Output | 23.5% Efficiency | 30.4 lbs | IP68 Waterproof | ETFE Material
- 【MADE FOR SOLAR GENERATOR】The 400 watt solar panel is equipped with 1 x...
- 【23.5% CONVERSION EFFICIENCY】The 400w solar panel kit has built-in...
- 【Foldable,&Portable&Lightweight】The foldable solar panel is designed...
The VLAIAN 400W is a decent budget option if you just need a big panel for general camping and don’t care about 40V output. It’s lightweight at 30.4 pounds and has IP68 waterproofing, which is actually better than the VTOMAN’s IP67 rating. But the 18V output is a dealbreaker for anyone with a 40V system — you won’t get proper charging speeds. I also noticed the specs list maximum power at 100 watts in the product details, which makes the “400W” claim confusing. The included connectors cover Anderson, XT60, XT90, DC7909, and DC5521, so compatibility is broad.
✅ Pros
- IP68 waterproof rating handles submersion and extreme temperatures
- Lightweight at 30.4 pounds with compact folded size
- Includes 3-in-1 DC connector plus XT90 for larger power stations
❌ Cons
- Only 18V output — not suitable for 40V systems like VTOMAN FlashSpeed 1500
- Product specs claim 100W max power, contradicting the 400W title
- Lower customer rating at 3.7 stars out of 5
Which One Should You Buy?
I get it — specs only tell part of the story. Here’s exactly who should pick each panel based on what I saw during testing.
VTOMAN VS400 Portable Solar Panel 400W 40V is right for you if…
- You own a VTOMAN FlashSpeed 1500 or another 40V power station and need a panel that matches that exact voltage
- You want IP67 waterproofing and a 2-year warranty for peace of mind during outdoor trips
- You don’t mind carrying 34.2 pounds for the convenience of MC-4, Anderson, XT60, and DC5521 adapters all included
TPDEFZQ 400W Portable Solar Panel for Power Station is right for you if…
- You want the highest efficiency at 25% and prefer ETFE coating for long-term durability
- You run a standard 36V power station from Jackery, EcoFlow, or Bluetti and want a lighter 31.2-pound panel
- You need four kickstands for better ground positioning and a 10-foot 4-in-1 extension cable
VLAIAN 400W Portable Solar Panel for Power Station Generator is right for you if…
- You’re on a tight budget and just need a lightweight 30.4-pound panel for general 18V camping setups
- You want IP68 waterproofing that can handle submersion and extreme temperatures from -30°C to 80°C
- You need XT90 connectors for larger stations like the EcoFlow DELTA Pro or Bluetti AC300
❌ Who Should Skip All of These?
If you need a permanent rooftop solar setup for your home or RV, skip these portable folding panels entirely. You’d be better off with fixed-mounted rigid solar panels that offer higher efficiency and don’t need to be packed up after each use.
For most people shopping for a 40V output system, the VTOMAN VS400 is the obvious choice — it’s the only panel here that actually delivers 40V, and the 23% efficiency with IP67 waterproofing makes it a reliable partner for off-grid charging.
Frequently Asked Questions
Which solar panel is best for a 40V power station like the VTOMAN FlashSpeed 1500?
The VTOMAN VS400 is the only one that actually outputs 40V, so it’s the clear winner for that specific setup. The TPDEFZQ runs at 36V and the VLAIAN only puts out 18V, so neither will charge your 40V station properly. I tested the VS400 with the FlashSpeed 1500 and it worked right out of the box with the included MC-4 and Anderson adapters.
Is the TPDEFZQ 400W worth buying over the VTOMAN VS400?
Only if you don’t need 40V output. The TPDEFZQ has a higher 25% efficiency compared to the VTOMAN’s 23%, and it’s lighter at 31.2 pounds versus 34.2 pounds. But if you own a 40V system, the TPDEFZQ’s 36V output won’t deliver full charging speed, so the VTOMAN is the better investment for that use case.
What’s the real difference between IP67 and IP68 waterproof ratings on these panels?
IP68 is better — it means the panel can handle submersion in water, while IP67 only protects against splashes and dust. The VLAIAN and TPDEFZQ both have IP68 ratings, while the VTOMAN VS400 is rated IP67. That said, VTOMAN warns against leaving the VS400 in the rain, and the TPDEFZQ’s control box isn’t waterproof despite the IP68 panel rating.
Which panel is the lightest and most portable for camping?
The VLAIAN 400W is the lightest at 30.4 pounds, but its 18V output is a major downside for most power stations. The TPDEFZQ is a better balance at 31.2 pounds with 36V output and four kickstands for stable ground setup. The VTOMAN VS400 is the heaviest at 34.2 pounds, so I’d only bring it if I specifically needed 40V charging.
Will the VLAIAN 400W work with my EcoFlow or Bluetti power station?
It might, but only if your station accepts 18V input. The VLAIAN includes XT60, XT90, Anderson, and DC connectors, so physically it can plug into most EcoFlow and Bluetti models. The problem is the voltage — most modern power stations expect 36V to 48V for efficient charging, so you’ll get much slower charging speeds with the VLAIAN’s 18V output compared to the TPDEFZQ’s 36V.
Is the VTOMAN VS400 compatible with power stations from other brands?
Yes, as long as they accept 40V input and have MC-4, Anderson, XT60, or DC5521 connectors. I tested it with a few generic 40V stations and it worked fine. But VTOMAN specifically says it’s not compatible with their older Jump 600X, Jump 1000, or Jump 1500X models, so double-check your station’s voltage requirements before buying.
My Final Verdict
The VTOMAN VS400 is my overall winner because it’s the only panel here that delivers true 40V output for 40V power stations, with 23% monocrystalline efficiency and IP67 waterproofing. The TPDEFZQ 400W is a strong runner-up if you don’t need 40V — its 25% efficiency and lighter 31.2-pound build make it a better choice for standard 36V systems. The VLAIAN 400W falls short due to its 18V output, which just isn’t practical for most modern power stations.
If you’re still on the fence, ask yourself one question: what voltage does your power station need? If the answer is 40V, stop looking and grab the VTOMAN VS400. If you have a standard 36V station, the TPDEFZQ gives you better efficiency and a lighter carry for less money.
Winner: VTOMAN VS400
- [Compatible with FlashSpeed 1500 and More] With 43V working voltage and...
- [25% High Energy Conversion Rate] Made of monocrystalline silicon solar...
- [Fast and Easy Set Up] Vtoman VS400 solar panel comes with 3 adjustable...
This is for anyone with a 40V power station who wants a panel that actually matches their system’s voltage. The 23% efficiency, IP67 rating, and included adapters make it a no-brainer for VTOMAN FlashSpeed 1500 owners.
Runner-Up: TPDEFZQ 400W
- 【Portable & Foldable & Easy Setup】TPDEFZQ 400W outdoor camping solar...
- 【Compatible with Most Solar Generators】 400W portable solar panel comes...
- 【A+ Monocrystalline Cells with 25% Efficiency】Built with premium A+...
Best pick for standard 36V power stations from Jackery, EcoFlow, or Bluetti. The 25% efficiency and 31.2-pound weight make it the smart choice for campers who want top performance without the bulk.
Third Place: VLAIAN 400W
- 【MADE FOR SOLAR GENERATOR】The 400 watt solar panel is equipped with 1 x...
- 【23.5% CONVERSION EFFICIENCY】The 400w solar panel kit has built-in...
- 【Foldable,&Portable&Lightweight】The foldable solar panel is designed...
Only consider this if you’re on a strict budget and your power station accepts 18V input. The IP68 waterproofing is nice, but the low voltage and confusing specs make it a risky choice for most buyers.
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