--- product_id: 139791562 title: "8W Mono Crystalline" brand: "sunway solar" price: "₹ 8257" currency: INR in_stock: true reviews_count: 5 category: "Sunway Solar" url: https://www.desertcart.in/products/139791562-8w-mono-crystalline store_origin: IN region: India --- # Maintains 12V battery charge 8.5W solar power output Built-in reverse charging protection 8W Mono Crystalline **Brand:** sunway solar **Price:** ₹ 8257 **Availability:** ✅ In Stock ## Summary > ☀️ Keep your ride ready with effortless solar power! ## Quick Answers - **What is this?** 8W Mono Crystalline by sunway solar - **How much does it cost?** ₹ 8257 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/139791562-8w-mono-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, protecting your battery at all times. - • **Universal Compatibility:** Perfect for cars, trucks, boats, motorcycles, and more—any 12V rechargeable battery. - • **Visible Charging Status:** LED indicator confirms when your battery is actively charging—no guesswork needed. - • **Durable & Weather-Resistant:** Ultra-clear PV glass and rugged ABS housing ensure long-lasting performance. - • **Effortless Solar Maintenance:** Plug & play design keeps your 12V battery topped off without overcharging. ## Overview The Sunway 8W Mono Crystalline Solar Panel is a compact, plug-and-play solar battery maintainer designed to keep 12V batteries charged and healthy. Featuring durable materials, built-in reverse charging protection, and a clear LED charge indicator, it’s ideal for vehicles and equipment that sit idle for long periods. This eco-friendly charger compensates for parasitic battery drains, ensuring your battery stays ready without risk of overcharging. ## 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: Works great - Short answer: Contrary to some of the negative reviews speaking about "warping", "discharging your battery" and other such things, it works exactly as advertised. I drive the test vehicle only a handful of times per year, so it sits outside for months on end sometimes which is bad for batteries, they like to be topped off all the time due to their internal chemistry. Long answer: I'm an Electrical Engineer so I did a few basic tests, with the following findings and some recommendations: NOTES: DO NOT leave the panel plugged in when starting or driving, spikes in the line might cause damage to the circuitry. It could fail and then put a load on the battery in that case. NO test for weather/water resistance was conducted, I have yet to test it in the winter time, which is a more challenging time for it and batteries too. I'm optimistic it will work ok given what I've seen so far. I tested this resting on the dashboard (no suction cups, I wouldn't trust that ever), with clear view of the sky facing generally slightly east of North during mid-late August, near the Washington DC area using a cigarette lighter connection with the supplied adapter. (it's FUSED, and works with a NEGATIVE ground socket/system, i.e. most everything not vintage) Some people have said the cig cable polarity is backwards, but in order to work as a CHARGER, the + connects to + as it should! Btw, the BLUE LED does NOT adversely effect the performance, and need not be "disabled" as some have claimed. The numbers I'm reporting are all with the unit as delivered, no modifications were made. 1) NO Battery discharge when dark (i.e., it doesn't drain your battery in the dark, or ever due to internal diode) Tested on the bench as well with a power supply and ammeter. 2) NO WARPING of case in direct sun 8hrs/day mid latitude US East Coast in August. (measured CABIN peak temps up to 117 deg, low of 69F, dash probably hotter in direct sun). ABS plastic has a glass transition temp (i.e. warping) around 105C (221F) so IF it is actually ABS, no melting/warping seems possible at temps found in cars NOT on fire lol! 3) For a HEALTHY battery, it MAINTAINS charge easily overcoming a parasitic drain in my vehicle of 9mA or (0.009Amps), and still puts a NET 44mA (0.044Amps) charging current INTO the battery in direct noon sun, and a NET positive charge current (in clouds/overcast), albeit only 7.3mA. In only 1 sunny day (and overnight) my new battery @ 12.34v went to 12.55v from this device. This is because it is a HEALTHY battery. The max open circuit voltage of the charger I measured around 22v but it can only deliver 1.5W max so you aren't going to hurt the battery with such low currents, and at best charging currents are only present up to about a 1/3 the time during a 24 hr period I'd estimate. NOTE: A dead/failing battery cannot be rescued by this or any charging device, and my prior failed battery at 12.24v (after 2 day commercial charge from "dead") with this same device under same summer conditions in 2 days went down to 12.01v and failed to turn over the engine! After the attempt it was down to 11.5v, clearly no good. I think this is suited as a MAINTAINER, don't bother thinking this will "charge" a vehicle battery. I drive that vehicle very very rarely, so this will keep the battery ready to go without having to periodically start it every few weeks to charge it up. Temperature and time will reduce the efficiency of the panel, but there is a 4x margin in my case (with a 9mA parasitic drain, which is quite small). If your car has a lot of electronic features, security systems etc, your parasitic drain could be more than this can even put out. In that case you would need a bigger higher power panel (this is only 1.5W). To measure the parasitic drain: with all vehicle doors shut, pull the main battery fuse and put an ammeter there, since it will measure absolutely everything, using any other fuse will only get a subset of what your battery drain is. Start with the maximum scale (typically 10A) to be safe, switch to smaller scales once you know the range. Let the initial connection settle since there will be a surge for a bit as all the electronics initialize and settle into a steady state. My vehicle settled in about 5 seconds (an after market CD player self test used 250mA during that 5 seconds) In principle, some sensors and other fancy stuff could spike some current periodically, but this couldn't be known without a logging ammeter. In all likelihood it won't boost the average drain in any significant way from your measured steady state. Review: Great Product. - Works great on cars and lawn tractor. Keeps batteries fully charged when equipment is not in operation. Shipping was quick. ## 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 | #8,773 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #10 in Solar Battery Chargers & Charging Kits | | Brand Name | Sunway Solar | | Connector Type | cigarette lighter plug | | Customer Reviews | 4.2 4.2 out of 5 stars (6,874) | | 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 | 2.67 Pounds | | Manufacturer | Sunway Solar | | Manufacturer Part Number | SWS-C8W008 | | Material Type | Crystalline | | Maximum Power | 8 Watts | | Maximum Voltage | 12 Volts | | Model Number | 8W solar trickle charger and maintainer | | Output Voltage | 12 Volts | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Sunway Solar - **Efficiency:** High Efficiency - **Item Weight:** 2.67 Pounds - **Material:** Crystalline - **Product Dimensions:** 0.6"L x 14.9"W x 8.3"H ## Images ![8W Mono Crystalline - Image 1](https://m.media-amazon.com/images/I/71+hLC876iS.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 great *by N***E on August 27, 2022* Short answer: Contrary to some of the negative reviews speaking about "warping", "discharging your battery" and other such things, it works exactly as advertised. I drive the test vehicle only a handful of times per year, so it sits outside for months on end sometimes which is bad for batteries, they like to be topped off all the time due to their internal chemistry. Long answer: I'm an Electrical Engineer so I did a few basic tests, with the following findings and some recommendations: NOTES: DO NOT leave the panel plugged in when starting or driving, spikes in the line might cause damage to the circuitry. It could fail and then put a load on the battery in that case. NO test for weather/water resistance was conducted, I have yet to test it in the winter time, which is a more challenging time for it and batteries too. I'm optimistic it will work ok given what I've seen so far. I tested this resting on the dashboard (no suction cups, I wouldn't trust that ever), with clear view of the sky facing generally slightly east of North during mid-late August, near the Washington DC area using a cigarette lighter connection with the supplied adapter. (it's FUSED, and works with a NEGATIVE ground socket/system, i.e. most everything not vintage) Some people have said the cig cable polarity is backwards, but in order to work as a CHARGER, the + connects to + as it should! Btw, the BLUE LED does NOT adversely effect the performance, and need not be "disabled" as some have claimed. The numbers I'm reporting are all with the unit as delivered, no modifications were made. 1) NO Battery discharge when dark (i.e., it doesn't drain your battery in the dark, or ever due to internal diode) Tested on the bench as well with a power supply and ammeter. 2) NO WARPING of case in direct sun 8hrs/day mid latitude US East Coast in August. (measured CABIN peak temps up to 117 deg, low of 69F, dash probably hotter in direct sun). ABS plastic has a glass transition temp (i.e. warping) around 105C (221F) so IF it is actually ABS, no melting/warping seems possible at temps found in cars NOT on fire lol! 3) For a HEALTHY battery, it MAINTAINS charge easily overcoming a parasitic drain in my vehicle of 9mA or (0.009Amps), and still puts a NET 44mA (0.044Amps) charging current INTO the battery in direct noon sun, and a NET positive charge current (in clouds/overcast), albeit only 7.3mA. In only 1 sunny day (and overnight) my new battery @ 12.34v went to 12.55v from this device. This is because it is a HEALTHY battery. The max open circuit voltage of the charger I measured around 22v but it can only deliver 1.5W max so you aren't going to hurt the battery with such low currents, and at best charging currents are only present up to about a 1/3 the time during a 24 hr period I'd estimate. NOTE: A dead/failing battery cannot be rescued by this or any charging device, and my prior failed battery at 12.24v (after 2 day commercial charge from "dead") with this same device under same summer conditions in 2 days went down to 12.01v and failed to turn over the engine! After the attempt it was down to 11.5v, clearly no good. I think this is suited as a MAINTAINER, don't bother thinking this will "charge" a vehicle battery. I drive that vehicle very very rarely, so this will keep the battery ready to go without having to periodically start it every few weeks to charge it up. Temperature and time will reduce the efficiency of the panel, but there is a 4x margin in my case (with a 9mA parasitic drain, which is quite small). If your car has a lot of electronic features, security systems etc, your parasitic drain could be more than this can even put out. In that case you would need a bigger higher power panel (this is only 1.5W). To measure the parasitic drain: with all vehicle doors shut, pull the main battery fuse and put an ammeter there, since it will measure absolutely everything, using any other fuse will only get a subset of what your battery drain is. Start with the maximum scale (typically 10A) to be safe, switch to smaller scales once you know the range. Let the initial connection settle since there will be a surge for a bit as all the electronics initialize and settle into a steady state. My vehicle settled in about 5 seconds (an after market CD player self test used 250mA during that 5 seconds) In principle, some sensors and other fancy stuff could spike some current periodically, but this couldn't be known without a logging ammeter. In all likelihood it won't boost the average drain in any significant way from your measured steady state. ### ⭐⭐⭐⭐⭐ Great Product. *by L***R on March 13, 2026* Works great on cars and lawn tractor. Keeps batteries fully charged when equipment is not in operation. Shipping was quick. ### ⭐⭐⭐⭐ A more rectangular format than the square types *by J***. on June 22, 2024* Seems to work fine, putting almost 15 volts out measured at the cable end. Mounted inside my windshield with truck facing early morning sun, it brought a battery at 12.1v up to 12.5 v. Sun lasts about four hours before going over the top of the truck. So about four more hours of shade with bright sky light only on the panel. Only issue is there are two batteries on my diesel Ram pickup and the other (passenger side) battery is not getting any voltage. I am charging through the power port. Looks like I have to use the alligator clips on that one and keep both charged by moving the clips to the other battery every day or so. It would be nice to have a splitter so I could plug into the power port and have another wire long enough to go past the door moulding and into the engine compartment to the second battery. Or a splitter with two sets of clips, each long enough to reach the batteries. Not use the power port. One wire could be longer than the other because I mount the panel on the lower driver side of the windshield. I will experiment by letting the batteries go down a bit and hook up the charger clips to the passenger side battery and see if the voltage reaches the driver side battery too. I don't know how these batteries are connected. The suction cups are easy to lose. They are not very secure, especially if the panel is mounted vertically. Be careful if you move the panel a lot. ## 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.in/products/139791562-8w-mono-crystalline](https://www.desertcart.in/products/139791562-8w-mono-crystalline) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-05-08*