--- product_id: 139791562 title: "Sunway Solar Car Battery Trickle Charger & Maintainer 12Volt 8W Solar Panel Power Charger kit Portable Waterproof for Automotive RV Marine Boat Truck Motorcycle Trailer Tractor Powersports Snowmobile" brand: "sunway solar" price: "¥19391" currency: JPY in_stock: true reviews_count: 8 category: "Sunway Solar" url: https://www.desertcart.jp/products/139791562-sunway-solar-car-battery-trickle-charger-and-maintainer-12volt-8w store_origin: JP region: Japan --- # Waterproof & durable design 12V battery compatibility 8.5W solar power output Sunway Solar Car Battery Trickle Charger & Maintainer 12Volt 8W Solar Panel Power Charger kit Portable Waterproof for Automotive RV Marine Boat Truck Motorcycle Trailer Tractor Powersports Snowmobile **Brand:** sunway solar **Price:** ¥19391 **Availability:** ✅ In Stock ## Summary > ☀️ Keep your ride powered up, effortlessly and eco-friendly! ## Quick Answers - **What is this?** Sunway Solar Car Battery Trickle Charger & Maintainer 12Volt 8W Solar Panel Power Charger kit Portable Waterproof for Automotive RV Marine Boat Truck Motorcycle Trailer Tractor Powersports Snowmobile by sunway solar - **How much does it cost?** ¥19391 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/139791562-sunway-solar-car-battery-trickle-charger-and-maintainer-12volt-8w) ## Best For - sunway solar enthusiasts ## Why This Product - Trusted sunway solar brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Safety Features:** Built-in diode prevents reverse charging, plus an LED indicator keeps you informed—charge with confidence. - • **Plug & Play Simplicity:** Instantly connect via cigarette lighter or battery clamps—no tech skills needed, just reliable power. - • **Built to Brave the Elements:** Waterproof, ultra-clear PV glass and rugged ABS housing ensure long-lasting performance rain or shine. - • **Effortless Solar Power Boost:** Harness up to 8.5W of clean, renewable energy to keep your 12V batteries charged—no plugs, no hassle. - • **Universal Battery Maintainer:** Perfect for Wet, Gel, SLA, AGM, and Deep Cycle batteries across cars, RVs, boats, motorcycles, and more. ## Overview The Sunway Solar Car Battery Trickle Charger is a portable, waterproof 8W solar panel designed to maintain and trickle charge 12V batteries across a wide range of vehicles. Featuring plug-and-play ease with cigarette lighter and battery clamp connectors, durable materials, and built-in reverse charging protection, it ensures your battery stays topped off using clean solar energy—ideal for cars, RVs, boats, motorcycles, and more. ## Description desertcart.com: Sunway Solar Car Battery Trickle Charger & Maintainer 12Volt 8W Solar Panel Power Charger kit Portable Waterproof for Automotive RV Marine Boat Truck Motorcycle Trailer Tractor Powersports Snowmobile : Patio, Lawn & Garden Review: Great product! Still working! - My husband purchased this for our older cars and truck recently. He doesn't use his truck every day, so he keeps it on the dashboard. It works really well, as our driveway is in a location which gets a bit of sun every day. He will move it from vehicle to vehicle, as he needs it and it has not failed to charge yet! Review: Worked in my Windshield - I got about 3.7W max power with the cell sitting flat on the driveway in Oct in Dallas around 2pm. I did not tilt it to get the optimum angle. Initially the power was about 1W higher but after 30-60 min in the sun the efficiency drops. The panel is rated for 8W if I can get 1/3 to 1/2 of that, I'm happy. I also put it in my van on the dash (again not angled toward the sun). The power dropped again (glass is blocking some of the light, see curves). I guess it could overcharge my battery (lead acid) since my parasitic drain is about 70mA and the cell voltage drops to 15.3V at that current (orange curve), but I doubt it since my new van sometimes will charge at 15.5V for 30-60min, then down to 14.4V for most for the time and sometimes as low as 12-13V. Unlike my older cars where lead acid charging was always around 14.4V. When the cell was on the driveway (blue curve) the cell resistance was about 12ohms in the 100mA to 200mA range if that helps. ## Features - [Solar Panel Power Up To 8.5W]--Keep your 12V batteries topped off with this solar battery charger ,which helps to manage battery drain in all seasons. Designed to compensate for small, steady battery drains from the vehicle's clock or alarm system.This battery charger will generate solar power to trickle charge battery as long as there is sufficient sunlight available. - [Pug And Play,Simple And Very Easy to Use]--This solar charger will NOT overcharge your battery! The solar charger panel mounts easily to the windshield or dash and conveniently plugs into your car's 12 volt cigarette lighter! If you need a Quick Connect And Disconnect Extension Cable For this solar charger,Please search the ASIN:B073158Q24. - [Stronger and Durable]--This solar powered battery charger is Covered with ultra clear PV glass which is more efficient and also with Durable ABS plastic housing which makes this solar panels charger more stronger. Low Maintenance! - [Charger & Maintainer For Any Rechargeable 12 Volt Battery]--This solar battery charger is the eco-friendly way to maintain and safely charges Wet, Gel, SLA,AGM and Deep Cycle batteries. It can maintain the charge of any cars, trucks, marines, motorcycles , tractors, ATVs, snowmobiles, boats and personal water crafts or RV 12 volt battery! - [Reverse Charging Protection]--With BUILT-IN DIODE for prevents reverse charging from batteries. With a 12volt LED charge indicator. The indicator lights up when it is charging. The solar charger maintainer also Includes cigarette lighter adapter and alligator battery terminal clamps. We offer 12-Month warranty and good customer service. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07QXYXMXT | | Best Sellers Rank | #11,587 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #9 in Solar Battery Chargers & Charging Kits | | Brand | Sunway Solar | | Brand Name | Sunway Solar | | Connector Type | cigarette lighter plug | | Customer Reviews | 4.3 out of 5 stars 904 Reviews | | Efficiency | High Efficiency | | Included Components | 1 x 8W solar panel, 1 x battery clamp, 1 x cigarette lighter plug, 4 x suction cup | | Item Dimensions L x W x H | 0.6"L x 14.9"W x 8.3"H | | Item Weight | 2.7 pounds | | Manufacturer | Sunway Solar | | Manufacturer Part Number | SWS-C8W008 | | Material | Crystalline | | Material Type | Crystalline | | Maximum Power | 8 watts | | Maximum Voltage | 12 volts | | Model Number | 8W solar trickle charger and maintainer | | Number of Items | 1 | | Output Voltage | 12 volts | | Product Dimensions | 0.6"L x 14.9"W x 8.3"H | | Unit Count | 1 Count | ## Product Details - **Brand:** Sunway Solar - **Efficiency:** High Efficiency - **Item Weight:** 2.7 pounds - **Material:** Crystalline - **Product Dimensions:** 0.6"L x 14.9"W x 8.3"H ## Images ![Sunway Solar Car Battery Trickle Charger & Maintainer 12Volt 8W Solar Panel Power Charger kit Portable Waterproof for Automotive RV Marine Boat Truck Motorcycle Trailer Tractor Powersports Snowmobile - Image 1](https://m.media-amazon.com/images/I/71+hLC876iS.jpg) ![Sunway Solar Car Battery Trickle Charger & Maintainer 12Volt 8W Solar Panel Power Charger kit Portable Waterproof for Automotive RV Marine Boat Truck Motorcycle Trailer Tractor Powersports Snowmobile - Image 2](https://m.media-amazon.com/images/I/71m+BFR2QOS.jpg) ![Sunway Solar Car Battery Trickle Charger & Maintainer 12Volt 8W Solar Panel Power Charger kit Portable Waterproof for Automotive RV Marine Boat Truck Motorcycle Trailer Tractor Powersports Snowmobile - Image 3](https://m.media-amazon.com/images/I/716yWy9iFWS.jpg) ![Sunway Solar Car Battery Trickle Charger & Maintainer 12Volt 8W Solar Panel Power Charger kit Portable Waterproof for Automotive RV Marine Boat Truck Motorcycle Trailer Tractor Powersports Snowmobile - Image 4](https://m.media-amazon.com/images/I/61lOV21MyIS.jpg) ![Sunway Solar Car Battery Trickle Charger & Maintainer 12Volt 8W Solar Panel Power Charger kit Portable Waterproof for Automotive RV Marine Boat Truck Motorcycle Trailer Tractor Powersports Snowmobile - Image 5](https://m.media-amazon.com/images/I/61el-oMMgNS.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can i use this 12 volt sports solar charger outdoors?** A: Yes, this 12 V power sports solar charger is weatherproof. But it should not be submerged in water. **Q: Is this unit water proof?** A: The waterproof performance of this sunway solar trickle charger is IP44.The charger can withstand splashing or light rain, but is not fully waterproof and should not be submerged or left outside during rainfall.The solar charger panel can be mounted to the windshield. **Q: How is this solar charger? Does it really waterproof?** A: This trickle battery charger solar charger is weatherproof. But it should not be submerged in water. **Q: can it be in the rain?** A: Ours is for the boat just wipe it after rain or weekly for dust. If that's not an option im sure it will be fine. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product! Still working! *by S***. on December 4, 2025* My husband purchased this for our older cars and truck recently. He doesn't use his truck every day, so he keeps it on the dashboard. It works really well, as our driveway is in a location which gets a bit of sun every day. He will move it from vehicle to vehicle, as he needs it and it has not failed to charge yet! ### ⭐⭐⭐⭐⭐ Worked in my Windshield *by J***. on April 2, 2023* I got about 3.7W max power with the cell sitting flat on the driveway in Oct in Dallas around 2pm. I did not tilt it to get the optimum angle. Initially the power was about 1W higher but after 30-60 min in the sun the efficiency drops. The panel is rated for 8W if I can get 1/3 to 1/2 of that, I'm happy. I also put it in my van on the dash (again not angled toward the sun). The power dropped again (glass is blocking some of the light, see curves). I guess it could overcharge my battery (lead acid) since my parasitic drain is about 70mA and the cell voltage drops to 15.3V at that current (orange curve), but I doubt it since my new van sometimes will charge at 15.5V for 30-60min, then down to 14.4V for most for the time and sometimes as low as 12-13V. Unlike my older cars where lead acid charging was always around 14.4V. When the cell was on the driveway (blue curve) the cell resistance was about 12ohms in the 100mA to 200mA range if that helps. ### ⭐⭐⭐⭐ Convenient top-up charger for infrequently driven cars *by R***K on December 30, 2023* I haven't been able to fully test this trickle charger, as we've had overcast rainy weather since a week or so before I got it. However, the installation was easy, the lighter plug option is convenient for my convertible which does not cut 12V to the lighter outlet (which is why I had to replace the battery the first time after leaving it for weeks with a USB charger in it). The problem I have is that I don't drive my convertible often. As a result, I find the battery drops, and a while back it got down under 10V. I could leave it on a plug-in charger but I don't want an unsecured extension cord coming out of my garage. I could replace the battery every spring but where's the fun in that? So a friend suggested I try this charger. In the two days or so since I installed it, my Hum dashboard shows no drop in voltage. So as far as I can tell, it's holding the charge around 12.5V even with overcast skies. When the rain ends, maybe end of next week, I'll see if it brings the line back up. ## Frequently Bought Together - Sunway Solar Car Battery Trickle Charger & Maintainer 12Volt 8W Solar Panel Power Charger kit Portable Waterproof for Automotive RV Marine Boat Truck Motorcycle Trailer Tractor Powersports Snowmobile - Sunway Solar Panels Charge Controller 12V Battery Regulator 7A for Safe Protection of 12Volt Solar Power Battery Charger, Solar Trickle Charger & Maintainer and Solar Powered System Kit - Sunway Solar 16FT Battery Charger Extension Cable SAE Connectors with Ring Terminal and Bare Strip Wire Adapter Quick Connect for 12V Battery Trickle Charger and Maintainer,and 12 Volt Solar Panel --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/139791562-sunway-solar-car-battery-trickle-charger-and-maintainer-12volt-8w](https://www.desertcart.jp/products/139791562-sunway-solar-car-battery-trickle-charger-and-maintainer-12volt-8w) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-26*