Renogy 10 Watts Portable Solar Battery Charger Maintainer, Backup for Car Boat Marine Motorcycles Truck
Condition: Used - Like New
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At a glance
- Condition
- Used - Like New
- Size
- BM-10W
- Model
- 10 Watts Portable
- Dimensions
- 0.1 x 16.1 x 7.9 in
- Weight
- 0.93 kg
- Material
- Monocrystalline Silicon
- Efficiency
- High Efficiency
- In the box
- Cables
Features 5
- Effortless Charging The highly efficient solar panel can charge and maintain a 12V lead-acid battery in daylight conditions.
- Smart Controller The built-in MPPT charge controller ensures a safe and efficient charging process with a smart 3-stage charging algorithm.
- Ultimate Safety The intelligent chip provides the battery and solar panel with comprehensive protections, including over-discharge protection, reverse polarity protection, and reverse current protection.
- Plug-n-Play Connection The SAE connecter and adapter cables provide a convenient connection to most 13V lead-acid batteries.
- Power source type: Solar Powered
Description
"Equipped with premium monocrystalline solar cells, the Renogy 10W Solar Battery Charger Maintainer manages your 12V lead-acid battery in daylight conditions by converting the sunlight into usable electricity and maintaining a healthy state of charge. The built-in MPPT (Maximum Power Point Tracking) charge controller intelligently manages the charging process and improves the charging efficiency by 10%-20%. The plug-and-play SAE connecter and included adapter cables make the solar battery charger maintainer a versatile fit for most applications. Note: For some makes or models of vehicles, the cigarette lighter port may not operate when the ignition is turned off. In such cases, please connect the solar battery charger maintainer to the battery directly.
Specs 12
| Brand | Renogy |
|---|---|
| Material | Monocrystalline Silicon |
| Item Weight | 0.93 Kilograms |
| Efficiency | High Efficiency |
| Connector Type | Sae |
| Maximum Voltage | 12 Volts |
| Maximum Power | 10 Watts |
| UPC | 810009714781 |
| Global Trade Identification Number | 81 |
| Product Dimensions | 0.1 x 16.1 x 7.9 inches |
| Manufacturer | Renogy |
| Item model number | 10 Watts Portable |
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To initiate a return, please visit our Returns Center.
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Top Amazon Reviews
Keeps car and tractor batteries charged!
Size: 10W
We have a couple of cars and a tractor that are used once every 2-3 months. It was always a gamble if they would start or if the battery would be dead. Living in Colorado, the cold would also kill these batteries even faster. We have one of these on our Dodge 2500 diesel, and it keeps the battery full and it starts up every time without issue. Same for our tractor. The solar charger keeps the battery charged. For our purposes, the cord length is no issue. I like the quick disconnect on it because I don't have to open up the hood on our tractor to take the solar panel off when I use it. Overall, this is a great product, and the value has more than paid for itself. We've had no issues with these products being outside in the weather. We live at a high altitude where UV light is extreme and we get lots of snow in the winter. These live outside in those elements and hold up just fine. Its super easy to hook it up to the battery, the quick disconnect is super convenient when its time to use the vehicle, and the suction cups & straps on the back of the solar panel make it easy to stick wherever it needs to go. It stays on the windshield of a truck just fine, and it attaches to the steering wheel of our tractor just fine.
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Reviewed in the United States on January 25, 2025 by mo3
Good trickle charger
Size: 10W
Works like it should, and doesn't warp or discolor from really hot days on the dash. Keeps voltage topped off, plugs right in easy, and not too big for smaller or contoured dashes. Durable, not brittle plastic like some. Wish there was a high wattage version for camping!
Reviewed in the United States on June 19, 2025 by Todd Graham
Solid solar battery maintainer. Provided cabling is sort of rubbish.
Size: 10W
I went through a period this summer where my car wasn't being driven very often, and while I didn't run its battery all the way down, it definitely went far lower than I would like. Since we live in an region of abundant sunshine, I figured I'd add a small solar panel to top up and maintain the battery when the car wasn't being used. We have a Renogy 200W panel for emergencies (intended for charging a Bluetti LiFePo4 box) that we're happy with, so I figured I'd give one of their little panels a chance. First impressions: the panel itself seems reasonably well built. it's stitched into a fabric housing with flaps that fold out that have suction cups whichhold it on the inside of the windscreen. The fabric makes handling it much safer than a plastic or metal case as it doesn't get nearly as hot in direct sunshine and doesn't transfer heat to your hands nearly as badly. The panel connects to one of a number of cables with a SAE connector. In my opinion, these cables are the weak spot of the whole thing. The main option for a quick connection has something like a 5-foot cable with a pair of alligator clips that you'd clamp on the battery terminals, which is *way* too short to be useful. Given it's not completely waterproof, it has to be mounted on the inside of the windscreen, and in my car the combined length of the panel's cable and the extension does *not* reach the battery in the front of the engine bay, meaning either another extension or custom cabling is required in my case. The panel also comes with a SAE to cigarette lighter adapter, which is useless for my car. My outlets are not powered when the ignition is turned off, so this is of no use to me. Finally, it also comes with a short cable with a pair of eyelets that you'd bolt to a battery with side terminals. It's about 2 feet long, so presumably this is for charging a battery outside of a car. None of these cables are fused in any way; I'd be especially cautious of using the eyelet cable wired permanently to a battery; if something shorts, there's no way to quickly remove it from the battery the way you would with alligator clips, and there's no guarantee you'd get the SAE connector apart in a hurry. In my opinion, the hardwire eyelet cable in particular must have an inline fuse right at the battery end of the cable on the positive side, but Renogy cheaped out. I actually ended up using the eyelet cable to make a custom cable. I cut the eyelet off the positive side and stuck the wire on the end of a usual add-a-fuse tap thing that runs to an unused always-hot slot in my inside fuse panel. That allows me to connect the panel up when I need it, but remove it at the SAE connector and tuck the wire away when I'm not without needing to connect and remove the car side wiring. Otherwise, the panel appears to work well enough. Starting from a bit below 12V, it dragged the battery up by a little over a tenth of a volt per day and kept it there when I went back to use the car after a few weeks. You wouldn't want to use one of these to completely charge a battery from flat; it's way too low-power for that. However, for this specific application, a larger, higher-output panel is not needed. Again, we get a lot of sun and this was tested at the beginning of summer, so it may not be nearly as effective in more northern locations at other times of the year.
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Reviewed in the United States on August 27, 2022 by Cray Grey
Wiring Lengths
Size: 10W
This is the same brand sold at some hardware stores but at a third of the price. Bought it to trickle charge a Jeep Liberty with an annoying untraceable drain. No problems with starting now after 2 weeks where as before the battery lasted a week is all. The only shortcoming with the item is the length of any of the cables that are not practical if you want to hard wire to the battery like me. My vehicle doesn't back charge from the cigarette lighter with ignition off so be sure to check your vehicle before buying. Anyway, I added 2 feet of wiring to reach from the battery to the panel for a hard wire. Also needs unplugging from whatever its plugged into before starting the vehicle so make sure it's accessible from inside the vehicle.
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Reviewed in the United States on August 10, 2025 by Mark