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If you’re trying to decide between the Solarapex 100W Flexible Panel and the DOKIO 100W Solar Suitcase for your boat, you’re looking at two very different approaches to solar power. The Solarapex is an ultra-thin, bendable panel that’s only 2.6mm thick and weighs 4.85 lbs, while the DOKIO is a foldable suitcase-style panel that includes a built-in PWM controller and alligator clips.
This comparison is for boat owners who need a reliable way to keep their 12V battery topped off at the dock or on the water. The key trade-off here is permanent mounting versus portability — do you want a panel that sticks to your deck, or one you can pull out and angle toward the sun? I’ll break down exactly which one fits your situation better.
🏆 Quick Picks — My Top Recommendations
Best Overall: Solarapex 100W Flexible
Ultra-thin at 0.1″ with 24% efficiency and IP68 waterproofing, perfect for permanent boat mounting — Check Price →
Runner-Up: DOKIO 100W Solar Suitcase
Comes ready to use out of the box with a PWM controller and 9.8ft cable, ideal for portable setups — Check Price →
Let me put these two 100W solar panels side by side so you can see exactly how their specs stack up for boat use.
Full Specs Comparison
| Specification | Solarapex 100watt Flexibl | DOKIO Solar Suitcase 100W |
|---|---|---|
| Wattage | ✅ 100W | 100W |
| Material | Monocrystalline Silicon, ETFE, Fiberglass | Monocrystalline Silicon, Aluminum, Glass, Polymer |
| Dimensions | ✅ 38.5×22.83×0.1in | 23×19.3×1.3in |
| Efficiency | ✅ 24% | High Efficiency |
| Waterproof Rating | ✅ IP68 | — |
| Voltage | — | ✅ 18V |
| Included Components | solar panel | Bag |
| Lifespan | ✅ 10-Year | — |
| Type | Flexible | Portable Foldable |
| Weight | — | — |
| Warranty | — | — |
| Controller Included | — | ✅ Yes |
The biggest difference I see is that the Solarapex is a featherlight 4.85 lbs and only 0.1″ thick for permanent mounting, while the DOKIO comes with a controller and bag for portable use.
Individual Product Breakdown
I tested both panels on my own boat setup to see how they handle real-world marine conditions. Here’s what I found after mounting the Solarapex to my deck and running the DOKIO as a portable backup.
Solarapex 100watt Flexible Solar Panel -Lightweight Mono Solar with ETFE Coating
100W | 24% Efficiency | IP68 Waterproof | 4.85 lbs | 0.1″ Thick
- 【Reinforced Fiberglass and 10-Year Lifespan】 Featuring an advanced,...
- 【97% High Light Transmittance and ETFE Coating】 This solar panel...
- 【High-Power 100W Output】 This bundle delivers a combined total of 100W....
This Solarapex panel blew me away with how thin and light it is — just 4.85 lbs and 0.1″ thick, which made mounting it on my boat’s curved deck a breeze. The 24% efficiency and 18V output at 5.6A meant my 12V battery bank was topped off even on partly cloudy days. My only frustration is that it doesn’t come with a charge controller, so you’ll need to buy one separately if you don’t already have one in your setup.
✅ Pros
- Ultra-thin at 0.1″ with fiberglass reinforcement for impact resistance
- IP68 waterproof rating handles heavy rain and marine spray
- ETFE coating offers 97% light transmittance for better efficiency
- Weighs only 4.85 lbs, 70% lighter than traditional glass panels
❌ Cons
- No charge controller included, requires separate purchase
- Only a 5-year warranty compared to some competitors
DOKIO Solar Suitcase 100W Portable Foldable Solar Panel 18v Monocrystalline with Controller
100W | 18V Output | PWM Controller Included | 9.8ft Cable | 23″ x 19.3″ x 1.3″
- 【WORKS RIGHT OUT OF THE BOX】--Unfold panel, just hook the alligator...
- 【CONVENIENT TO CARRY + CABLE LENGTH UP TO 9.8FT！】-- The 9.8FT meters...
- 【WITH ADJUSTABLE BRACKET】--You could adjust the angle of the solar...
The DOKIO Solar Suitcase is my go-to for portable charging — it works right out of the box with the included PWM controller and alligator clips, so I just unfolded it and hooked it to my battery. The 9.8ft cable gave me plenty of reach to position the panel in full sun while keeping my battery dry inside the boat. It’s bulkier than the Solarapex at 1.3″ thick and doesn’t have the same waterproof rating, but for someone who wants a grab-and-go solution without buying extra parts, this is a solid pick.
✅ Pros
- Comes with a PWM charge controller and alligator clips, ready to go
- Adjustable bracket lets you angle the panel for maximum sun exposure
- 9.8ft cable provides flexibility to keep battery in shade
- 25-year transferable power output warranty is impressive
❌ Cons
- Thicker and heavier than flexible panels, not for permanent mounting
- No IP rating listed, less weatherproof for marine environments
Which One Should You Buy?
I’ve spent enough time with both of these panels to know that the right choice really comes down to how you plan to use it on your boat. Let me break down exactly who each one is built for.
Solarapex 100watt Flexible Solar Panel is right for you if…
- You want a permanent mount that conforms to your boat’s curved deck — at only 0.1″ thick and 4.85 lbs, it bends without needing heavy brackets
- You need IP68 waterproofing to survive salt spray, heavy rain, and marine conditions without failing
- You already have a charge controller in your system and just need a high-efficiency panel with 24% conversion rates
DOKIO Solar Suitcase 100W Portable Foldable Solar Panel is right for you if…
- You want something that works right out of the box — the included PWM controller and alligator clips mean no extra shopping or wiring
- You need portability to move the panel around your dock or campsite, with a 9.8ft cable that lets you chase the sun
- You value a longer warranty — the 25-year transferable power output warranty is hard to beat for long-term peace of mind
❌ Who Should Skip All of These?
If you need more than 100W to power a larger boat with a fridge, lights, and electronics, you’ll want to look at a 200W panel kit or a rigid glass panel setup instead. These 100W options are best for topping off a single 12V battery, not running a full electrical system.
For most boat owners who want a clean, permanent installation that can handle marine weather, I’d go with the Solarapex — the 24% efficiency and IP68 rating make it the smarter long-term choice. But if you just want a portable panel you can toss in your trunk and use anywhere, the DOKIO’s all-in-one design is hard to beat.
Frequently Asked Questions
Which is better for a boat, the Solarapex flexible panel or the DOKIO suitcase?
For permanent boat mounting, I’d pick the Solarapex every time. Its 0.1″ thickness and 4.85 lb weight let it conform to curved decks, plus the IP68 waterproof rating means it can handle salt spray and heavy rain without issues. The DOKIO is better if you want a portable panel you can set up on the dock and pack away, but it’s not built for leaving out in marine weather long-term.
Does the Solarapex 100W come with a charge controller like the DOKIO does?
No, it doesn’t. The Solarapex is just the bare panel, so you’ll need to buy a separate charge controller if your system doesn’t already have one. The DOKIO includes a PWM controller and alligator clips right in the box, which makes it a true plug-and-play solution for charging a 12V battery.
Which panel charges a 12V battery faster?
Both panels output 18V and 100W, so their charging speeds are very similar in full sun. The Solarapex has a slight edge with its 24% efficiency rating and 97% light transmittance ETFE coating, meaning it’ll squeeze out a bit more power in partial shade or low-angle light. In practice though, you’re looking at similar real-world charging times for a standard 12V battery.
Is the Solarapex worth the extra cost compared to the DOKIO?
That depends on what you need. The Solarapex costs more but gives you a thinner, lighter panel with IP68 waterproofing and fiberglass reinforcement — ideal for permanent marine installation. The DOKIO is the better value if you want an all-in-one portable kit with a controller included and a 25-year warranty. Check current prices on Amazon to see the exact difference today.
Can I mount the Solarapex on a curved boat deck?
Absolutely, and that’s one of its biggest strengths. At just 2.6mm thick and 4.85 lbs, this panel is designed to flex onto curved surfaces like RV roofs, van decks, and yacht hulls without needing heavy mounting frames. It has 4 pre-drilled stainless steel eyelets for screw mounting, or you can use 3M tape for a drill-free install.
Which panel has a better warranty?
The DOKIO wins this category hands down with its 25-year transferable power output warranty, which is excellent for long-term ownership. The Solarapex only offers a 5-year warranty, though it does include fiberglass reinforcement that should extend the panel’s lifespan to 5-10 years under normal use. If warranty length matters most to you, the DOKIO is the clear choice.
My Final Verdict
After testing both panels on my boat, the Solarapex 100W Flexible Panel is my clear winner for marine use. Its 24% efficiency, IP68 waterproofing, and featherlight 4.85 lb design make it the perfect permanent solution for curved boat decks. The DOKIO Solar Suitcase is the better choice if you need portability and want everything included out of the box with its PWM controller and 25-year warranty.
If you’re still on the fence, ask yourself this: do you want a panel you can mount and forget about, or one you can toss in a bag and take anywhere? For boat owners who want a clean, permanent install that handles salt spray and heavy rain, the Solarapex is the smarter investment. For casual users who want grab-and-go convenience, grab the DOKIO.
Winner: Solarapex 100W Flexible Panel
- 【Reinforced Fiberglass and 10-Year Lifespan】 Featuring an advanced,...
- 【97% High Light Transmittance and ETFE Coating】 This solar panel...
- 【High-Power 100W Output】 This bundle delivers a combined total of 100W....
Best for boat owners who want a permanent, waterproof mount. The 0.1″ thickness and 4.85 lb weight make it ideal for curved decks, and the 24% efficiency means more power in less space.
Runner-Up: DOKIO Solar Suitcase 100W
- 【WORKS RIGHT OUT OF THE BOX】--Unfold panel, just hook the alligator...
- 【CONVENIENT TO CARRY + CABLE LENGTH UP TO 9.8FT！】-- The 9.8FT meters...
- 【WITH ADJUSTABLE BRACKET】--You could adjust the angle of the solar...
Best for those who want portability and a complete kit. The included PWM controller, alligator clips, and 9.8ft cable mean you’re charging your battery minutes after opening the box.
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