--- product_id: 37166100 title: "4W Poly Crystalline" brand: "sunway solar" price: "R1667" currency: ZAR in_stock: true reviews_count: 8 url: https://www.desertcart.co.za/products/37166100-4w-poly-crystalline store_origin: ZA region: South Africa --- # 12V battery compatible 4W solar power max reverse charge protection 4W Poly Crystalline **Brand:** sunway solar **Price:** R1667 **Availability:** ✅ In Stock ## Summary > ☀️ Power your ride sustainably—never get stranded with Sunway Solar! ## Quick Answers - **What is this?** 4W Poly Crystalline by sunway solar - **How much does it cost?** R1667 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/37166100-4w-poly-crystalline) ## 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; LED indicator shows charging status. - • **Plug & Play Convenience:** Mounts easily with suction cups and plugs into your vehicle’s 12V cigarette lighter. - • **Durable & Weather-Resistant:** Tempered glass and ABS plastic housing ensure long-lasting, low-maintenance use. - • **Effortless Solar Maintenance:** Keep your 12V batteries topped off year-round without overcharging or damage. - • **Universal Battery Compatibility:** Supports Wet, Gel, SLA, AGM, LiFePO₄, Lithium-Ion & Deep Cycle batteries. ## Overview The Sunway Solar 4W 12V Trickle Charger is a portable, durable solar panel designed to maintain and safely charge a wide range of 12V batteries across vehicles like cars, RVs, boats, motorcycles, and farm equipment. Featuring reverse charge protection, easy windshield mounting, and compatibility with multiple battery types, it ensures your battery stays topped off effortlessly in all seasons. ## Description Why do I need a solar trickle charger? Three reasons to own a Sunway Solar Battery Trickle Charger: ## Features - [Solar Panel Power Up To 4W]--Keep your 12 Volt batteries topped off with this solar battery trickle charger ,which helps to manage 12v battery drain in all seasons. Designed to compensate for small, steady battery drains from the vehicle's clock or alarm system. - [Simple And Very Easy to Use]--This solar trickle charger will NOT overcharge the battery or cause any damage if the battery capacity is 20Ah or greater, .The solar charger panel mounts easily to the windshield or dash and conveniently plugs into your car's 12 volt cigarette lighter! Suction cups available with the solar charger. {If you need a Quick Connect And Disconnect Extension Cable For this solar charger,Please search the ASIN:B06X6LJTD6.} - [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! - [For Any Rechargeable 12Volt Batteries]--This solar battery trickle charger is the eco-friendly way to maintain and safely charges any 12volt Wet, Gel, SLA,AGM, LiFePO₄,Lithium-Ion 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 Led light up when it is charging. The solar charger maintainer Includes cigarette lighter adapter and alligator battery terminal clamps. We offer 12-Month warranty and good customer service. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B01MYVUSRH | | Best Sellers Rank | #11,274 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #9 in Solar Battery Chargers & Charging Kits | | Brand Name | Sunway Solar | | Connector Type | Cigarette Lighter Plug, Battery Clamps | | Customer Reviews | 4.2 4.2 out of 5 stars (2,024) 4.2 out of 5 stars | | Included Components | Power Cable | | Item Dimensions L X W X H | 13.9"L x 5"W x 0.5"H | | Item Weight | 1.4 pounds | | Manufacturer | Sunway Solar | | Manufacturer Part Number | SWS-C3W001 | | Material Type | Monocrystalline Silicon, Tempered Glass, Abs Plastic, Aluminum | | Maximum Power | 4 watts | | Maximum Voltage | 12 volts | | Model Number | 4W solar trickle charger for battery | | Number Of Items | 1 | | Output Voltage | 12 volts | | Unit Count | 1 Count | | Upc | 611550648699 | ## Product Details - **Brand:** Sunway Solar - **Included Components:** Power Cable - **Item Weight:** 1.4 pounds - **Material:** Monocrystalline Silicon, Tempered Glass, Abs Plastic, Aluminum - **Product Dimensions:** 13.9"L x 5"W x 0.5"H ## Images ![4W Poly Crystalline - Image 1](https://m.media-amazon.com/images/I/71UYd+uk0SS.jpg) ![4W Poly Crystalline - Image 2](https://m.media-amazon.com/images/I/81e1eKftSsS.jpg) ![4W Poly Crystalline - Image 3](https://m.media-amazon.com/images/I/71P+pE4CfBS.jpg) ![4W Poly Crystalline - Image 4](https://m.media-amazon.com/images/I/71VQijIrrCS.jpg) ![4W Poly Crystalline - Image 5](https://m.media-amazon.com/images/I/61FDwEdBS8S.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 ### ⭐⭐⭐⭐⭐ Works fine but you do need to isolate any load from the battery(s) *by on Reviewed in the United States March 13, 2020* So I bought this Sunway solar Car Battery Trickle Charger to maintain my 12v RV trailer battery's when the trailer is not in use. The trailer is 28ft and has two batteries hooked in parallel that feed the camper. Having battery power is important because it is needed to open the two large slides not to mention powering lights etc. Initially I hooked the solar panel up without removing trailer connections to the batteries and a week later returned to find the batteries totally drained. I knew there must be something drawing power in the trailer and discovered LEDs, a gauge, and a CO2 detector that was drawing power. After recharging the batteries using shore power, I installed a heavy duty switch in-line on the negative lead leading into the camper. I did this by drilling a 2" hole in the battery cover lid and inserted the switch through the lid cover. I ended up with a clean solution. Using the switch I isolate the camper from the battery bank when the camper is not in use and the solar panel keeps the batteries topped up as as designed. When I need to use the camper I simply turn the switch and power is applied to the camper. The output current of this size solar panel is only able to top up batteries. If you want to charge empty batteries to a fully charged state you will need a larger Solar panel. This panel will do what it is designed to do...i.e. top up batteries that do not have a load. The switch can be found at https://www.amazon.com/gp/product/B07MQ54KKH/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 ### ⭐⭐⭐⭐⭐ 4 watt works better than the 8 watt panels *by on Reviewed in the United States April 14, 2026* Great product, even though the first one I bought warped, and died after about two years. Used every day in my truck, as it is parked unless camping or picking up lumber or jerrends like that.I purchased two 8 watt, and they have to be in exactly the right spot to charge, which means you have to keep moving it also and have a meter to check. (Major return problems). That is why I bought this 4 watt again, and is working great. ### ⭐⭐⭐⭐ 🌟🌟🌟🌟🌟 **A Reliable and Efficient Solar Charger!** *by on Reviewed in the United States December 9, 2024* Just to note - this seems to fail about every 18 months - I hope this one doesn't do the same againThe Sunway Solar Car Battery Trickle Charger & Maintainer is exactly what I needed to keep my 12V car battery charged and maintained. The solar panel is compact and lightweight, making it easy to position on the dashboard or windshield with the included suction cups.It’s super easy to set up—just plug it into the cigarette lighter or connect it directly to the battery with the alligator clips. I’ve been using it for a while now, and it keeps my battery in top shape, even during extended periods of non-use.This is a great solution for maintaining batteries in cars, boats, or RVs. Highly recommend for anyone looking to extend their battery life and avoid unnecessary drains. ⭐⭐⭐⭐⭐ ## Frequently Bought Together - Sunway Solar Car Battery Trickle Charger & Maintainer 12V Solar Panel Power Kit Portable Backup for Car Automotive RV Marine Boat Motorcycle Truck Trailer Tractor Powersports Snowmobile Farm Equipment - OYMSAE 25Feet SAE to SAE Extension Cable Quick Disconnect Connector 16AWG,for Automotive,Solar Panel Panel SAE Plug(25FT(16AWG)), Charging Adapter --- ## 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.co.za/products/37166100-4w-poly-crystalline](https://www.desertcart.co.za/products/37166100-4w-poly-crystalline) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-10-02*