Best Solar Battery Chargers & Charging Kits of 2025

"I have a late model 5th gen 4Runner that I don’t drive often, and the parasitic battery drain from the telematics is a common issue. After replacing the battery twice, I decided to try this solar charger. It's been three months, and I leave it connected using the quick disconnect lead. It’s compact, weatherproof, and durable, and I love the LED indicators that show its status. I even monitor the battery with a Bluetooth device. The problem is solved, and I would definitely buy this again!"

"I bought this for my boat batteries and couldn’t be happier! It works as advertised and is inexpensive. Each of my three batteries has its own unit, and the ultra-smart feature prevents overcharging. I installed them, left for a couple of days, and they were performing flawlessly upon my return. I highly recommend this product!"

"I recently started using this to keep my generator battery charged, and so far, it’s been working well. I was initially skeptical about the MPPT charger technology, but it’s proved to be effective. My only wish is that it came with an OBD2 cable adapter since most cars only work with that when the ignition is off."

“I received my solar charger this morning, and I was surprised by its excellent build quality right out of the box. It took me less than a minute to set it up. Even on a cloudy day, it was putting out about 5 watts, which is impressive considering the conditions. This charger is just what I needed for my Jeep, especially since I only use it once a week.”

“Setup was a breeze for me! I love that it doesn't require a lot of sunlight to function. Even when it's overcast, it still charges my truck. While it doesn’t charge super fast, it does a great job of maintaining a consistent charge.”

“I was really pleased with this solar charger. It keeps my dump trailer battery fully charged! I highly recommend it for anyone needing a reliable solution.”

"I've got two of these panels and have used them on dozens of vehicles over the last two years. They even revived a nearly dead 5-year-old battery. I mainly use them to maintain cars I don't drive often. The connection options are very handy, but I wish the cables were a bit longer for my larger vehicles. In strong winds, the suction cups can fail, so I secure them every time I put them out."

"During the summer, my car wasn't driven often, and the battery drained more than I liked. Since we have plenty of sunshine, I decided to try a solar panel to maintain the battery. The panel seems well-built, and the fabric housing is safer to handle. However, I found the cables to be the weak spot; the alligator clip cable is too short for my car’s battery. The panel works well enough for battery maintenance, but I had to make some custom modifications."

"I got this panel for my 4Runner because its battery drains a bit from lack of use. I placed it on the dash, but it doesn’t seem to be doing much. I charged my battery fully, and after two days, it read 12.43 volts. Even though I see good voltage from the panel, it only produced 0.12 Amps, which is disappointing. The quality looks fine, but the suction cups don’t stay put. I trust the Renogy name, but I'm still uncertain if it will keep my battery topped up."

"I purchased this for my Prius since it often sits unused for over a month. The auxiliary 12-volt battery was draining due to the smart key system, but this unit has been a lifesaver. I connected it with a ring terminal pigtail, and it works like a charm to maintain the battery's charge."

"I've had this solar panel on my 2006 GMC Sierra Duramax for four years now. Living in Florida, it's perfect for charging my secondary AGM battery. Even after taking a beating, it's still durable with no cracks. I might even get another one for dedicated charging!"

"I installed this solar charger on my trailer. Initially, it was working great, but after a couple of weeks, it stopped functioning. I noticed water dripping out of the case, indicating it might not be designed well for outdoor use."

“I’ve been using this solar charger for three months mounted on my horse trailer. It keeps my battery at full charge and works perfectly. I’m considering getting another for my boat!”

“I didn't expect this solar charger to be so sturdy. I’m building a generator shed and needed something reliable to maintain my generator battery. It took only one hour to show a full trickle charge after I plugged it in.”

“After testing it, I found that my truck starts up without any issues after sitting for a while, thanks to this charger. The green light on the controller finally turned on, indicating my battery was fully charged!”

"I received this but found that both of my cigarette lighters are disconnected when the ignition is off, making it much more difficult to use."

"Initially, I found this solar charger to be working great, though I had to cut a small side off the suction cup to fit it properly through the hole."

"I bought this to keep my car battery charged, but it barely charged the battery even after sitting in direct sunlight for hours. It doesn't seem to help a car that sits for a long time."

"After a month with my solar panel, I was pleasantly surprised to find it still functioning and generating voltage, complete with photos and videos. Great product!"

"I had some doubts about this fitting my Spypoint Link Micro, but I found the connector slightly bends without damage. However, using a security lock can make it tricky. Overall, it works fine if you’re careful."

"I bought my first solar panel three months ago and it’s still going strong. Unfortunately, the second one I purchased wouldn’t charge at all. I wish I had seen the reviews mentioning that only one out of two tends to work. Now I’m stuck outside the return window."

"Initially, I was impressed with the panel's performance. I monitored my battery voltage regularly and saw that the charge was increasing. However, when I decided to trust it and stop checking, my battery ended up dead. It turns out my car's Hands-Free Link module was the real culprit. Once I unplugged it, I found that my battery stayed well above 12.3 volts even after three weeks without use."

"I bought this to keep the battery charged in my rarely used second vehicle. Previously, the battery would die in about a week. After placing the panel on the dash and connecting it, my engine started effortlessly after three weeks. I measured it at 18v and 1.5amps. I'm really happy with the quality and performance, and I would definitely purchase again."

"After a week of troubleshooting, I realized I received a non-functional product. I tried using different connectors, but there were still no indicator lights. I even tested it on two other vehicles with functioning batteries, but it was dead in sunlight. I will be returning this item."

"I installed this on my car that doesn't get driven much, and it's keeping the battery strong!"

"I reordered this because some punk ripped my old one off. It's a life saver for keeping my neighbor's car running without needing to start it constantly."

"I bought this 1.8W solar charger to replace my previous one for my generator battery. I'm happy with its performance, but I'm a bit worried about its longevity. I hope this one lasts longer!"

"I have a 2014 Prius that often sits idle for a month. I purchased this trickle charger to prevent the 12V battery from dying. With an extension cable running from the solar charger on the dashboard to the battery in the back, it has kept my battery alive for three months now. The green light upon my return after four weeks indicated that the battery was fully charged. I do remove it when driving to avoid it flying off, and I'm curious to see how it performs during the winter with less sunlight."

"I originally bought one of these chargers for my 2004 Jeep Grand Cherokee, which I park outdoors occasionally. It worked so well that I purchased a second one for my 2000 Cherokee. Instead of dragging out a big charger or worrying about the battery, I simply place the panel on the roof and let it do its job. With alarms on both vehicles, I've had no issues in over a year."

"I bought this solar panel for my tractor to keep the battery charged. It's been outdoors, exposed to rain and sun, and I’m pleased to report that it has held up remarkably well. Installation was a breeze; just match the polarity and you’re done. I even dropped it a couple of times, and it didn’t sustain any damage. The LED indicators work perfectly, showing when it’s charging and when the battery is fully charged."