Keeping your trolling motor battery charged and ready for a full day on the water can be a challenge, especially during multi-day trips or when shore power isn’t available. That’s where a dedicated solar charger for your trolling motor battery comes in. These portable panels harness the sun’s energy to provide a steady, maintenance-free charge, extending your fishing time and protecting your battery investment. With so many options, from compact trickle chargers to powerful MPPT kits, finding the best one can be tricky. Our expert-tested roundup cuts through the noise to bring you the top performers that deliver reliable power, durability, and peace of mind for any angler.
In This Article
- 1 Quick Product Comparison
- 2 Our Top 10 Best Solar Charger For Trolling Motor Battery Reviews – Expert Tested & Recommended
- 2.1 1. SUNER POWER 12W 12V Solar Battery Charger with MPPT Controller for Marine and Automotive Use
- 2.2 2. SUNER POWER 30W 12V Waterproof Solar Battery Charger and Maintainer with MPPT Technology
- 2.3 3. SUNER POWER 20W 12V Solar Trickle Charger with Intelligent MPPT Controller for Batteries
- 2.4 4. POWOXI 7.5W 12V Portable Waterproof Solar Trickle Charger and Battery Maintainer Kit
- 2.5 5. SOLPERK 20W 12V Solar Panel Kit with MPPT Controller and Adjustable Mount Bracket
- 2.6 6. SolarEnz 10W 24V Trolling Motor Battery Charger with Plug and Play Solar Panel
- 2.7 7. SUNER POWER 30W 12V Solar Battery Charger Kit with MPPT Controller and Bracket
- 2.8 8. Sun Energise 15W 12V Solar Battery Charger and Maintainer with MPPT Charge Controller
- 2.9 9. Voltset 20W 12V Waterproof Solar Trickle Charger with Smart Charge Controller Kit
- 2.10 10. Voltset 30W 24V Solar Panel Kit with MPPT Charge Controller and Adjustable Bracket
- 3 Complete Buying Guide for Best Solar Charger For Trolling Motor Battery
- 4 Frequently Asked Questions
- 4.1 Q: Can a solar charger fully recharge a dead trolling motor battery?
- 4.2 Q: Do I need a special solar charger for a 24V trolling motor system?
- 4.3 Q: What does MPPT mean, and why is it important?
- 4.4 Q: Can I leave my solar battery charger connected all the time?
- 4.5 Q: Will a solar charger work on cloudy days?
Quick Product Comparison
Our Top 10 Best Solar Charger For Trolling Motor Battery Reviews – Expert Tested & Recommended
1. SUNER POWER 12W 12V Solar Battery Charger with MPPT Controller for Marine and Automotive Use
This SUNER POWER 12W unit is our top pick because it perfectly balances smart technology, reliability, and value for a trolling motor battery. Its Ultra-Smart MPPT controller squeezes every last watt from the sun, making it incredibly efficient even on partly cloudy days. It’s a true “set it and forget it” solution that keeps your battery in peak condition.
Key Features That Stand Out
✓ Ultra-Smart MPPT Technology for maximum power harvest.
✓ Improved 3-stage charging (Bulk, Absorption, Float) for battery health.
✓ Fully automatic maintenance – stops and resumes charging as needed.
✓ Excellent for marine and automotive 12V batteries.
Why We Recommend It
It’s the ideal “always-on” guardian for your battery. Whether your boat is stored for a week or you’re on a weekend fishing trip, this charger provides a steady, intelligent trickle charge that prevents discharge without the risk of overcharging. The build quality inspires confidence for long-term outdoor use.
Best For
Anglers who want a foolproof, efficient, and durable solar maintainer for a single 12V trolling motor battery. It’s perfect for routine maintenance and extending battery life.
Pros and Cons
Pros:
- Highly efficient MPPT technology maximizes charging.
- 3-stage charging protects and prolongs battery life.
- Fully automated operation requires no user intervention.
- Robust construction suitable for marine environments.
Cons:
- 12W is best for maintenance/trickle charging, not fast recharging.
- May require direct sunlight for optimal performance.
Customer Reviews
Customer Review: “I have a late-model 4Runner… the telematics… pre-dispose it to parasitic drain. This solar charger has been a perfect solution to keep the battery topped up since I don’t drive it often.”
Customer Review: “*** update*** one of my best purchases!… I have an older 2000 4 Runner… There’s a constant known drain. This thing is fantastic!”
2. SUNER POWER 30W 12V Waterproof Solar Battery Charger and Maintainer with MPPT Technology
When you need more power for faster charging or have higher energy demands, this SUNER POWER 30W waterproof solar charger is the expert’s choice. It combines high output with the same trusted MPPT tech and robust, weatherproof construction. This is the charger you want for serious off-grid battery maintenance.
Key Features That Stand Out
✓ High 30W output for faster charging capability.
✓ Waterproof design for ultimate marine durability.
✓ Ultra-Smart MPPT technology and 3-stage charging.
✓ Functions as both a charger and a long-term maintainer.
Why We Recommend It
The 30W power means it can genuinely replenish a depleted battery faster than smaller units, not just maintain it. The waterproof rating gives you peace of mind during rain or spray, making it arguably the most durable and powerful all-in-one option for a trolling motor setup.
Best For
Boaters who need a higher-wattage, waterproof charging solution. Ideal for larger batteries, faster recovery between uses, or situations with less consistent sunlight.
Pros and Cons
Pros:
- Higher 30W output allows for more substantial charging.
- Fully waterproof construction for harsh marine conditions.
- Includes the efficient MPPT and 3-stage smart charging.
- Can handle larger or more deeply discharged batteries.
Cons:
- Larger physical size than lower-wattage panels.
- Higher price point than basic trickle chargers.
Customer Reviews
Customer Review: “I got it to keep my truck battery charged when camping, hunting, or fishing… and it works perfectly. Durable, waterproof, and easy to set up, it’s a reliable way to maintain your battery.”
Customer Review: “Unit feels solid and works well on sunny days. I use it with an OBD2 port adapter to maintain my car’s battery charge while parked long term.”
3. SUNER POWER 20W 12V Solar Trickle Charger with Intelligent MPPT Controller for Batteries
Offering a fantastic sweet spot of power and price, this 20W SUNER POWER model is our best budget solar charger. You still get the crucial MPPT efficiency and smart charging stages, but at a more accessible cost. It’s the smart choice for the value-conscious angler who doesn’t want to compromise on technology.
Key Features That Stand Out
✓ Affordable price with high-value MPPT technology.
✓ 20W provides a good balance of maintenance and charging power.
✓ Full safety protections (over-charge, short-circuit, etc.).
✓ Improved 3-stage charging algorithm for battery longevity.
Why We Recommend It
It proves you don’t need to spend a fortune to get a high-performance solar charger. The 20W output is very capable for most trolling motor battery maintenance needs, and the inclusion of MPPT, usually found in pricier models, makes it an outstanding bargain.
Best For
Budget-minded fishermen seeking reliable, smart solar charging without the premium price tag. Great for standard 12V trolling motor batteries used on weekends.
Pros and Cons
Pros:
- Excellent value with MPPT technology at a lower cost.
- 20W is a versatile wattage for maintenance and light charging.
- Comprehensive electronic protections enhance safety.
- Reliable performance from a trusted brand.
Cons:
- Not waterproof like some higher-end models.
- May need a separate mounting solution.
Customer Reviews
Customer Review: “I purchased this tender for my pickup truck battery. Since I don’t drive it frequently… I had to replace batteries repeatedly due to disuse. Determined to find a solution, I decided to try a tender… It has solved my battery drain issue completely.”
Customer Review: “I connected it directly to the battery… It keeps the battery at a full charge and has saved me from having to replace it prematurely. Very happy with this purchase.”
4. POWOXI 7.5W 12V Portable Waterproof Solar Trickle Charger and Battery Maintainer Kit
The POWOXI 7.5W is a compact, ultra-portable champion for simple battery maintenance. Its smaller size and lower wattage make it a dedicated trickle charger, perfect for fighting slow battery drain during storage. It’s rugged, waterproof, and gets the job done without fuss.
Key Features That Stand Out
✓ Very compact and highly portable design.
✓ Waterproof construction for durability.
✓ Upgrade intelligent charge controller with protection system.
✓ High-strength, impact-resistant glass surface.
Why We Recommend It
If your sole need is to keep a stored battery from going dead, this little unit is remarkably effective. Its toughness is proven in real-world conditions, handling heat and rain. It’s a simple, no-nonsense tool that excels at its specific task.
Best For
Anglers needing a small, tough, and affordable maintainer for winter storage or for boats/kayaks with minimal space. Ideal for combating parasitic drain over weeks or months.
Pros and Cons
Pros:
- Extremely compact and easy to store or position.
- Proven waterproof and weather-resistant build.
- Very affordable entry point for solar maintenance.
- Smart controller prevents overcharging.
Cons:
- 7.5W is for maintenance only, not for charging a dead battery.
- Lower wattage requires good sun exposure to be effective.
Customer Reviews
Customer Review: “So far so good. I have this sitting on the hood of an 81 Toyota pickup for the past 3 weeks in Phoenix. It has dealt with the heat no problem, made it through two thunderstorms, and has kept the battery topped up.”
Customer Review: “This charger Kit is a compact and practical tool for keeping 12V batteries charged… I set it up on my motorcycle during winter storage, and it kept the battery topped off without overcharging.”
5. SOLPERK 20W 12V Solar Panel Kit with MPPT Controller and Adjustable Mount Bracket
The SOLPERK kit stands out because it includes a versatile adjustable mount bracket. This allows you to easily angle the panel for maximum sun exposure throughout the day or season, which can significantly boost charging efficiency. It’s a complete, well-thought-out system.
Key Features That Stand Out
✓ Includes a handy adjustable mounting bracket for optimal angle.
✓ High conversion rate monocrystalline solar cells (21%-30% efficiency).
✓ Built with low-iron tempered glass and a rustproof frame.
✓ Upgraded 8A smart charge controller for high efficiency.
Why We Recommend It
The adjustable bracket is a game-changer for permanent or semi-permanent installation on a boat or near a storage shed. You’re not just buying a panel; you’re buying a tailored charging station that you can optimize, leading to better performance than a flat-laid panel.
Best For
DIYers and boat owners who want to set up a fixed or semi-permanent solar charging station for their trolling motor battery and want the ability to adjust the panel’s angle.
Pros and Cons
Pros:
- Adjustable mount bracket maximizes energy capture.
- Very high-efficiency monocrystalline solar cells.
- Extremely durable, waterproof, and rustproof construction.
- Comes as a complete, ready-to-install kit.
Cons:
- The bracket adds to the overall size and footprint.
- Slightly more complex initial setup than simple panels.
Customer Reviews
Customer Review: “I bought the SOLPERK 20W Solar Panel Kit to keep the battery on my RV topped off, and it has worked perfectly from day one. The adjustable mount makes it easy to position for the best sun exposure.”
Customer Review: “I’m extremely impressed… The installation was quick and easy, especially with the adjustable mounting bracket, which made it simple to find the perfect angle for maximum sunlight.”
6. SolarEnz 10W 24V Trolling Motor Battery Charger with Plug and Play Solar Panel
This SolarEnz model is purpose-labeled for trolling motors and is designed for 24V battery systems, which are common in higher-thrust trolling motors. Its lightweight, low-profile design makes it easy to bring along or mount on a boat without taking up much space.
Key Features That Stand Out
✓ Specifically designed for 24V trolling motor battery systems.
✓ Lightweight (2.5lb) and portable with a skinny design.
✓ Uses high-efficiency monocrystalline cells.
✓ Plug-and-play setup for easy use.
Why We Recommend It
If you run a 24V trolling motor, it’s crucial to use a charger designed for that voltage. This panel fills that niche. Its slim form factor is a major plus for anglers with limited deck space, allowing it to be stowed or mounted unobtrusively.
Best For
Boaters with 24V trolling motor systems who need a compact, dedicated solar maintainer. Good for kayak anglers or those with smaller boats where space and weight matter.
Pros and Cons
Pros:
- Correct voltage (24V) for many trolling motor setups.
- Exceptionally lightweight and easy to transport.
- Low-profile design doesn’t get in the way.
- Simple plug-and-play operation.
Cons:
- 10W is a low output, suitable only for maintenance on large 24V batteries.
- Some user reports of inconsistent performance.
- Lacks advanced features like MPPT.
Customer Reviews
Customer Review: “Does not charge battery. Very disappointing.”
Customer Review: “Works for maintaining a charge on my 24V system during summer storage, but wouldn’t rely on it to charge a low battery.”
7. SUNER POWER 30W 12V Solar Battery Charger Kit with MPPT Controller and Bracket
Another powerful 30W offering from SUNER POWER, this kit version includes a bracket for easy mounting. It combines high-output charging with the convenience of a ready-to-mount solution, making it a great all-in-one package for those who want to install and forget.
Key Features That Stand Out
✓ 30W high output with Smart MPPT Technology.
✓ Comes with a mounting bracket for secure installation.
✓ Improved 3-stage charging for battery health.
✓ Automatic free maintenance mode.
Why We Recommend It
It offers the same robust 30W performance as our Editor’s Choice but includes a bracket, which adds value and convenience. This makes it easier to securely mount the panel on a boat canopy, cabin top, or in your backyard, ensuring it stays put and oriented correctly.
Best For
Anglers looking for a high-power 30W charger who also want the mounting hardware included for a clean, permanent, or semi-permanent installation.
Pros and Cons
Pros:
- High 30W charging power.
- Includes a mounting bracket (great value add).
- Trusted MPPT and 3-stage smart charging.
- Fully automatic operation.
Cons:
- Bracket may not be as adjustable as a dedicated mounting kit.
- Larger size due to high wattage.
Customer Reviews
Customer Review: “Used this on our boat this summer when moored and it kept the battery fully charged.”
Customer Review: “This is a great small battery charger. Easy to hook up and ideal for an occasionally used battery… This charger keeps the battery fully charged.”
8. Sun Energise 15W 12V Solar Battery Charger and Maintainer with MPPT Charge Controller
The Sun Energise 15W charger is a solid mid-range performer that brings MPPT efficiency to a very accessible price point. It’s a great “just right” option—more power than a basic trickle charger but more compact and affordable than a heavy-duty 30W panel.
Key Features That Stand Out
✓ Smart MPPT Technology for efficient charging.
✓ Upgrade 3-stage charging algorithm for safety.
✓ Full charging protection suite (over-voltage, short circuit, etc.).
✓ 15W provides a good boost over standard 10W maintainers.
Why We Recommend It
It hits a sweet spot, offering meaningful charging capability and smart features without a significant size or cost increase. For many anglers with a standard 12V trolling motor, this 15W unit provides all the solar charging performance they’ll ever need.
Best For
Boat owners seeking a balance of performance, size, and cost. An excellent all-around choice for maintaining and lightly charging a 12V trolling motor battery.
Pros and Cons
Pros:
- Good 15W power with efficient MPPT tech.
- Comprehensive electronic protections.
- Compact and manageable size.
- Very competitive pricing for the features offered.
Cons:
- Not advertised as waterproof.
- May not include mounting hardware.
Customer Reviews
Customer Review: “I was a bit skeptical… So, I got this in and hooked it up… Prior that the battery would go dead within a week. Since installing this, the battery is always charged and ready.”
Customer Review: “I bought this trickle charger to keep the 12V battery from going dead… I bought an extension cable… So far, it has kept my battery charged for the last two months while the car sits.”
9. Voltset 20W 12V Waterproof Solar Trickle Charger with Smart Charge Controller Kit
Voltset brings robust engineering with its IP67 full-potting technology on the controller, making it highly resistant to moisture and dust. This 20W kit is built for tough conditions and includes useful accessories like alligator clips and O-rings for versatile connections.
Key Features That Stand Out
✓ IP67 Waterproof Full-Potting on the controller for extreme durability.
✓ Smart 3-stage visual charging for multiple battery types (LiFePO4, AGM, etc.).
✓ Versatile kit includes alligator clips and O-rings.
✓ Collapsible design for easier storage.
Why We Recommend It
The IP67 rating on the controller is a standout feature for marine use, where connectors are often exposed to spray. The ability to visually see the charge stage via LEDs is also a nice user-friendly touch, giving you confidence it’s working.
Best For
Boaters who operate in wet, harsh environments and need a charger they can trust not to fail due to moisture. Also great for those with different types of 12V batteries.
Pros and Cons
Pros:
- Exceptionally waterproof (IP67) charge controller.
- Compatible with a wide range of 12V battery chemistries.
- Helpful LED indicators show charging status.
- Comes with a complete connection kit.
Cons:
- Some reports of reduced performance in very cold temperatures.
- Collapsible design might be less rigid than a solid panel.
Customer Reviews
Customer Review: “The Voltset 12V Solar Battery Charger – 20W is exactly what I was looking for. It feels solid and well built… Setup was quick, and it immediately started delivering a steady charge.”
Customer Review: “Worked in the summer but nothing at 30 degrees. Got in house to warm up to see if that helps. Caution advised if getting.”
10. Voltset 30W 24V Solar Panel Kit with MPPT Charge Controller and Adjustable Bracket
For those running a powerful 24V trolling motor system, this Voltset 30W kit is a premium solution. It combines high wattage, the correct voltage, MPPT efficiency, and an adjustable bracket into one powerful package designed for serious off-grid battery support.
Key Features That Stand Out
✓ High-Efficiency 30W monocrystalline panel for 24V systems.
✓ Includes a smart MPPT charge controller.
✓ Robust, durable construction with tempered glass.
✓ Comes with an adjustable mounting bracket.
Why We Recommend It
It addresses the needs of 24V users with ample power and smart features. The 30W output is meaningful for larger battery banks, and the adjustable bracket ensures you get the most out of the panel. This is a top-tier kit for a demanding application.
Best For
Owners of 24V trolling motor systems who need substantial solar charging power and want a complete, high-quality kit with mounting options.
Pros and Cons
Pros:
- Powerful 30W output designed for 24V batteries.
- Includes both MPPT controller and adjustable bracket.
- High conversion efficiency up to 30%.
- Durable, weather-resistant build quality.
Cons:
- Higher price point due to specialized voltage and high wattage.
- The kit is more complex and larger than simple maintainers.
Customer Reviews
Customer Review: “I’ve tried several solar panel kits… the Voltset 30W 24V Solar Panel Kit is by far the best one!… The build quality is excellent, the MPPT charge controller is very efficient, and the adjustable bracket is a huge plus.”
Customer Review: “This solar charger is compact, lightweight, and perfect for outdoor activities. Its foldable design makes it easy to store… it can still charge effectively.”
Complete Buying Guide for Best Solar Charger For Trolling Motor Battery
Essential Factors We Consider
Choosing the right solar charger isn’t just about wattage. First, match the voltage: 12V for most standard trolling motors, 24V for higher-thrust models. Next, consider wattage (W). A 5W-10W panel is fine for maintenance. For actual charging or larger batteries, aim for 20W-30W. Controller technology is key: MPPT controllers are more efficient than PWM, especially in low light. Look for waterproof and durable construction for marine use. Finally, check for smart features like 3-stage charging and overcharge protection to keep your battery healthy.
Budget Planning
Your budget depends on your needs. Under $50 gets you a reliable trickle charger like the POWOXI 7.5W for basic maintenance. The $50-$100 range is the sweet spot, offering smart MPPT chargers like our Best Budget SUNER POWER 20W. Over $100, you’ll find high-power, waterproof kits with brackets, like the SUNER POWER 30W Waterproof model, ideal for demanding or permanent setups. Remember, a good solar charger protects a $100+ battery, so it’s a wise investment.
Final Thoughts
Think about how you’ll use it. Is it for winter storage, or for charging between fishing days on a trip? Do you need to mount it permanently on the boat, or will you move it around? Answering these questions will steer you toward the right blend of power, durability, and features. The best solar charger is the one you can rely on to ensure your trolling motor always has the juice you need when you’re on the water.
Frequently Asked Questions
Q: Can a solar charger fully recharge a dead trolling motor battery?
A: It depends on the wattage of the panel and the size (Ah) of the battery. A small 10W trickle charger is meant for maintenance and will take many days of perfect sun to recharge a dead battery. A 20W or 30W panel can provide meaningful charging current and will recharge a battery much faster, but for a fully dead large battery, a traditional AC charger is still the quickest method. Solar is best for maintaining a charge or providing a steady top-up.
Q: Do I need a special solar charger for a 24V trolling motor system?
A: Yes, absolutely. You must use a solar charger designed for 24V systems. Using a 12V charger on a 24V battery bank will not work effectively and could damage the charger. Look for models specifically labeled for 24V, like the SolarEnz 10W or the Voltset 30W 24V kit in our roundup.
Q: What does MPPT mean, and why is it important?
A: MPPT stands for Maximum Power Point Tracking. It’s a smart technology in the charge controller that constantly adjusts to pull the maximum possible power from the solar panel, especially under less-than-ideal light conditions (clouds, angled sun). An MPPT controller can be 20-30% more efficient than older PWM types, meaning you get more charging power from the same size panel.
Q: Can I leave my solar battery charger connected all the time?
A> Yes, that’s one of the main benefits! Quality solar chargers with smart controllers (featuring 3-stage or float charging) are designed to be left connected indefinitely. They will charge the battery, then switch to a safe “float” or “maintenance” mode that prevents overcharging. Just ensure the panel gets some light to keep the controller powered.
Q: Will a solar charger work on cloudy days?
A> Yes, but with reduced output. Solar panels still produce power in cloudy weather, though it can be 10-25% of their rated capacity. This is where an efficient MPPT controller really proves its worth, as it can maximize the small amount of available power to still provide a useful trickle charge.
Investing in a reliable solar charger for your trolling motor battery is a game-changer for any serious angler. It eliminates the worry of a dead battery after storage, extends the life of your expensive battery, and can even give you extra confidence on long days off the grid. Whether you choose our top-rated SUNER POWER 12W for its brilliant balance, the powerful 30W waterproof model for tough conditions, or the excellent budget 20W option, you’re taking a smart step towards hassle-free fishing. Don’t let a lack of power cut your next trip short.
Ready to never worry about a dead trolling motor battery again? Check out our top picks above and choose the solar charger that fits your boat and your budget. Click the “Check Price” buttons to see the latest deals and get yours today!
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