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expiredWiznaz | Staff posted May 26, 2025 11:21 AM
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expiredWiznaz | Staff posted May 26, 2025 11:21 AM

Eco-Worthy 10W Solar Car Battery Charger Maintainer

& More

$22

$43

48% off
Amazon
58 Comments 37,127 Views
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Deal Details
ECO-WORTHY US via Amazon has ECO-WORTHY 10W Solar Car Battery Charger Maintainer for $21.60. Shipping is free w/ Prime or on $35+ orders.

ECO-WORTHY US via Amazon also has ECO-WORTHY 5W Solar Car Battery Charger Maintainer for $16.99. Shipping is free w/ Prime or on $35+ orders.

Thanks to Slickdeals Moderator Wiznaz for finding this deal.

Features:
  • Suitable for keeping vehicles/boat battery charged during the weeks unused. No need to disconnect the battery or have someone start the vehicle periodically. The indicator light on the back can observe the charging state. And it's waterproof, you can safely use it outdoors(After experimental test).
  • The 10w monocrystalline solar panel uses trickle charging to charge the battery without causing overcharging. Built-in blocking diode prevents reverse charging without extra maintenance at night. Works even on cloudy days. As frosted surface, the panel doesn't need film protection anymore.
  • Equipped with SAE cable, just plug the cigarette lighter into the port or connect the battery terminal posts with the alligator clip, and the connection can be completed within 3 minutes! Suitable for car, truck, boat, lawn mower, motorcycles, trailer, dump trailer, tractor, RV, van, camper, ATV, utility vehicle Battery etc.

Editor's Notes

Written by Corwin | Staff
  • About this Deal:
    • Please see original post for additional details and give the WIKI and forum comments a read for helpful discussion.
  • About this Product:
    • Rating of 4.3 stars overall from over 5,900 customer reviews.
  • About this Store:

Original Post

Written by Wiznaz | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
ECO-WORTHY US via Amazon has ECO-WORTHY 10W Solar Car Battery Charger Maintainer for $21.60. Shipping is free w/ Prime or on $35+ orders.

ECO-WORTHY US via Amazon also has ECO-WORTHY 5W Solar Car Battery Charger Maintainer for $16.99. Shipping is free w/ Prime or on $35+ orders.

Thanks to Slickdeals Moderator Wiznaz for finding this deal.

Features:
  • Suitable for keeping vehicles/boat battery charged during the weeks unused. No need to disconnect the battery or have someone start the vehicle periodically. The indicator light on the back can observe the charging state. And it's waterproof, you can safely use it outdoors(After experimental test).
  • The 10w monocrystalline solar panel uses trickle charging to charge the battery without causing overcharging. Built-in blocking diode prevents reverse charging without extra maintenance at night. Works even on cloudy days. As frosted surface, the panel doesn't need film protection anymore.
  • Equipped with SAE cable, just plug the cigarette lighter into the port or connect the battery terminal posts with the alligator clip, and the connection can be completed within 3 minutes! Suitable for car, truck, boat, lawn mower, motorcycles, trailer, dump trailer, tractor, RV, van, camper, ATV, utility vehicle Battery etc.

Editor's Notes

Written by Corwin | Staff
  • About this Deal:
    • Please see original post for additional details and give the WIKI and forum comments a read for helpful discussion.
  • About this Product:
    • Rating of 4.3 stars overall from over 5,900 customer reviews.
  • About this Store:

Original Post

Written by Wiznaz | Staff

Community Voting

Deal Score
+29
Good Deal
Visit Amazon

Price Intelligence

Model: ECO-WORTHY 10W Solar Car Battery Charger Maintainer 12V Waterproof Solar Panel Portable Solar Trickle Charger for Car Truck Boat Lawn Mower RV Trailer Tractor ATV Utility Vehicle Battery

Deal History 

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Sort: Lowest to Highest | Last Updated 12/26/2025, 03:41 PM
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Top Comments

bktj600
227 Posts
69 Reputation
I would not be able to recommend something like this to anyone, as if I recall correctly the OBD2 port draws power through the ecm so any wonky voltage or short might damaged the ecm for the engine and that might be a bit more expensive than a battery. Do you have the solar panel connected to something that is regulating output voltage/amps to the obd2 port?
PurpleSink3298
215 Posts
18 Reputation
Just to note- if you prefer to use the cigarette lighter to connect, it will only charge the system if your cigarette lighter stays on after you turn the vehicle off. Also, 10w is the absolute minimum power I'd bank on for maintaining a trickle charge.
android
598 Posts
105 Reputation
I have had this for 4 months or so, and it works great! Before I had frequent dead battery since I don't drive a lot. Now never a problem.

I mounted the solar panel into my sunroof under the glass, and routed the wires through the trim to the OBD port, which allows always on charging in my older car.

57 Comments

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May 27, 2025 02:14 AM
1,417 Posts
Joined Feb 2017
geektechMay 27, 2025 02:14 AM
1,417 Posts
I have a 7w version from Harbor freight and what all I can tell you is that those types of things are literally useless.
May 27, 2025 02:34 AM
171 Posts
Joined Dec 2020
mekkisMay 27, 2025 02:34 AM
171 Posts
Quote from StrongTest8065 :
Yup. Barely 500mA at peak performance is going to do very little (I can't believe they sell a 5 watt model). Most trickle chargers are 1-2 amps and even they can have difficulty with modern cars that don't actually turn off when you turn them off. These really should be marketed as charge maintainers rather than trickle chargers, and even that will be a stretch under anything but perfect conditions. There is no situation where you will put this on a dead battery and come back, even a week later, to be able to start the car.
laughs in watchdog timers
May 27, 2025 03:47 AM
23 Posts
Joined Apr 2025
daylightsMay 27, 2025 03:47 AM
23 Posts
Quote from kida182001 :
Highly recommend getting one with a charge controller, which this one does not.
It should not matter too much with lead acid batteries.
May 27, 2025 03:49 AM
85 Posts
Joined Jun 2018
JonP7715May 27, 2025 03:49 AM
85 Posts
So this thing is fine for a lawn tractor that usually doesn't have a problem starting even after sitting all winter but the owner has a slickdeals fueled consumerism problem?
1
May 27, 2025 04:55 AM
2,111 Posts
Joined Jun 2007
ilovecanadaMay 27, 2025 04:55 AM
2,111 Posts
Quote from JonP7715 :
So this thing is fine for a lawn tractor that usually doesn't have a problem starting even after sitting all winter but the owner has a slickdeals fueled consumerism problem?
I use it for that and have that malady and so far so good.
May 27, 2025 05:44 AM
362 Posts
Joined Oct 2017
JasonR9389May 27, 2025 05:44 AM
362 Posts
I've got four of these on automobiles, a tractor, a semi tractor, and an ATV and they all work great! Easy to move from place to place as well, and keeps batteries fully charged when sitting for a few days or more.
May 27, 2025 05:44 AM
2,129 Posts
Joined Oct 2009
minnusMay 27, 2025 05:44 AM
2,129 Posts
It's interesting that comments range from "this is too weak to do anything" to "this will overcharge your battery and kill it", lol.
1

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May 27, 2025 05:44 AM
362 Posts
Joined Oct 2017
JasonR9389May 27, 2025 05:44 AM
362 Posts
Quote from PurpleSink3298 :
Just to note- if you prefer to use the cigarette lighter to connect, it will only charge the system if your cigarette lighter stays on after you turn the vehicle off. Also, 10w is the absolute minimum power I'd bank on for maintaining a trickle charge.
I've had no trouble with the 7.5w model as well, easily keeps the battery charged in a Chevy Tahoe when it sits for a few weeks or a month before I drive it.
May 27, 2025 05:46 AM
362 Posts
Joined Oct 2017
JasonR9389May 27, 2025 05:46 AM
362 Posts
Quote from quitosky :
I often have to jump the battery of my car during winter time when it gets to 0 degrees. This might help
Sounds like you need a new battery, shouldn't be an issue if it's fully charged.I've started my V8 Tahoe, ATV, tractor, and my car below zero without needed to have a charger connected. Maybe check your alternator as well.
2
May 27, 2025 05:49 AM
5,666 Posts
Joined Jul 2017
Luigis3rdcousinMay 27, 2025 05:49 AM
5,666 Posts
I bought this last time and it hardly produced any wattage at all 🤦 huge waste of time.
1
May 27, 2025 09:25 AM
1,013 Posts
Joined Sep 2004
DerpVaderMay 27, 2025 09:25 AM
1,013 Posts
Quote from quitosky :
I often have to jump the battery of my car during winter time when it gets to 0 degrees. This might help
Unlikely. You either have an old battery or a cheap one that lacks the needed CCA (cold cracking amps) save your money and put it towards a better battery
1
May 27, 2025 09:27 AM
1,013 Posts
Joined Sep 2004
DerpVaderMay 27, 2025 09:27 AM
1,013 Posts
Quote from JasonR9389 :
I've had no trouble with the 7.5w model as well, easily keeps the battery charged in a Chevy Tahoe when it sits for a few weeks or a month before I drive it.
I can't imagine this thing doing anything for you. Depending on the vehicle it can sit and still start. Especially if it's then driven long enough for the alternator to recharge the battery.
May 27, 2025 09:59 AM
71 Posts
Joined Nov 2007
fugufishMay 27, 2025 09:59 AM
71 Posts
I've been running one on my UTV since 2021. It keeps the battery topped up with no issues, even in the dead of winter. It's survived rain, snow, ice and everything else. I connect it directly to the battery with a quick disconnect pigtail as the 12V cig. lighter method does not work in my Ranger.
May 27, 2025 10:04 AM
19 Posts
Joined Jan 2020
DisturbedklownzMay 27, 2025 10:04 AM
19 Posts

Our community has rated this post as helpful. If you agree, why not thank Disturbedklownz

Quote from StrongTest8065 :
Yup. Barely 500mA at peak performance is going to do very little (I can't believe they sell a 5 watt model). Most trickle chargers are 1-2 amps and even they can have difficulty with modern cars that don't actually turn off when you turn them off.
These really should be marketed as charge maintainers rather than trickle chargers, and even that will be a stretch under anything but perfect conditions. There is no situation where you will put this on a dead battery and come back, even a week later, to be able to start the car.
It's a charger if the battery is not hooked from anything and a maintainer if the battery is hooked up to a car. It's not their fault the car has a parasitic draw more than it's supposed to.Normal draw is between 50-100mA.People need to fix the issue, and this product will do just fine. I have a few of these and they work just fine.
2

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Expert
This user is an Expert in Home & Home Improvement
May 27, 2025 11:28 AM
7,068 Posts
Joined Oct 2014
firebirdude
Expert
This user is an Expert in Home & Home Improvement
May 27, 2025 11:28 AM
7,068 Posts
When hunting for parasitic draw problems, the target number I've always been taught is 50mA. So long as you're at or below 50mA, you're fine.
12V x 830mA = 10W
This is a maintainer. I don't see a problem with "only" 10W of output.

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