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Red_Liz | Staff 45.2K Views
Mar 24, 2026 5:49 PM

ECO-WORTHY 10W Solar Car Battery Charger Maintainer w/ OBD-II Cable

$24

$40

40% off
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Update: This popular deal is still available.

CO-WORTHY US via Amazon has ECO-WORTHY 10W Solar Car Battery Charger Maintainer w/ OBD-II Cable for $29.99 - $6 when you apply promo code OZ623KSG at checkout = $23.99. Shipping is free with Prime or on $35+ orders.
  • Note: You must be logged in to apply promo codes; promo codes are typically for one-time use and don't always apply seamlessly. If you run into this issue, refresh the page, re-enter the code, or revisit the cart page.
Thanks to Staff Member Red_Liz for sharing this deal.

Includes:
  • 10W 12V solar battery charger panel
  • OBD-II charging cable (for direct vehicle connection)
  • Alligator clip cable (for direct battery connection)
  • Adjustable mounting bracket
  • 4 x PVC screw-on suction cups for window mounting
  • Integrated indicator light (built into panel)

Editor's Notes

Written by qwikwit | Staff
  • About this deal:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • About this store:

Original Post

Written by Red_Liz | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Update: This popular deal is still available.

CO-WORTHY US via Amazon has ECO-WORTHY 10W Solar Car Battery Charger Maintainer w/ OBD-II Cable for $29.99 - $6 when you apply promo code OZ623KSG at checkout = $23.99. Shipping is free with Prime or on $35+ orders.
  • Note: You must be logged in to apply promo codes; promo codes are typically for one-time use and don't always apply seamlessly. If you run into this issue, refresh the page, re-enter the code, or revisit the cart page.
Thanks to Staff Member Red_Liz for sharing this deal.

Includes:
  • 10W 12V solar battery charger panel
  • OBD-II charging cable (for direct vehicle connection)
  • Alligator clip cable (for direct battery connection)
  • Adjustable mounting bracket
  • 4 x PVC screw-on suction cups for window mounting
  • Integrated indicator light (built into panel)

Editor's Notes

Written by qwikwit | Staff
  • About this deal:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • About this store:

Original Post

Written by Red_Liz | Staff

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Top Comments

azndudeC2
7Comments
10Reputation
The OBD connector on this is a little finicky. It only has one of the two possible ground pins and as a result didn't work on my 2000s Camry and Corolla
Go to Comment
Dud321
270Comments
366Reputation
When placing a solar panel behind a vehicle windshield, you can expect an average efficiency loss of 30% to 50% compared to placing it in direct outside sunlight. Under poor conditions, such as with tinted glass or suboptimal angles, this loss can soar to 70% or more.
Go to Comment
OJ47
185Comments
46Reputation
I got this about a month ago at $30 for a truck that isn't used too often. I use it with the solar panel inside the windshield on the dashboard, connected to the OBD2. It's been working well so far.
Go to Comment

Community Reviews

This 10W solar battery maintainer is aimed at keeping a parked vehicle topped off, especially for cars, trucks, mowers, and other equipment that sit for weeks at a time. The low price stands out, and the panel has been reported to hold batteries around 12.75 volts, clear low battery warnings, and restart vehicles after long idle periods. The OBD II setup is convenient for some vehicles, but the connector can be finicky, and several reports question whether the panel is enough in winter, behind tinted glass, or for dead batteries. It looks best suited to light maintenance in decent sun.

Common Questions (5)

  • For maintenance use, 10W can be enough because real-world parasitic draw on many vehicles is low and the panel's rated wattage is its maximum output. It may still be insufficient for some vehicles, especially in winter, under snow, or when the car's draw is higher than the panel can replace.

    nodashiplRyanMPLSJasonSternNothingworked

  • Yes, it can keep rarely driven vehicles topped off and prevent low-battery warnings when the car has parasitic draw or sits for weeks. Users report success on trucks, vans, mowers, and older cars, with batteries staying around 12.75V and cars starting right up after long sits.

    WillingbaconOJ47GorethresherCurtitout

  • It can work through the OBD-II port on vehicles that support it, and some setups use the battery-terminal clips or a wired-in battery connection instead. Several comments note the OBD-II route is finicky on some cars, so direct battery connections are the safer fallback.

    azndudeC2Robin00bmwe30nutXoblaim

  • It is a battery maintainer, not a dead-battery charger. It is meant to keep an already charged battery topped off and prevent drain, though some users report it can recover a battery if left on long enough.

    JasonR9389OJ47SiennaAlpaca1565sl001

  • It can work inside the windshield, but output drops compared with direct sun. One comment estimates a 30% to 50% efficiency loss behind glass, and tinted glass or poor angles can push losses to 70% or more.

    Dud321OJ47Zip.Zap

AI-generated summary based on comments from the community. Updated ago

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70 Comments

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Mar 25, 2026 6:07 AM
185 Comments
Joined Dec 2010
OJ47Mar 25, 2026 6:07 AM
185 Comments

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

Quote from Dfinding View quoted comment :
I don't know much about how it worksWould it overcharge and/or damage the battery (if left unattended)?
No, this is a battery maintainer, meant to be left unattended to keep things like car batteries topped off and not drained. It has overcharge protection built in. Normally battery maintainers are plugged into an outlet; this is plugged into a solar panel.
1
Mar 25, 2026 5:58 PM
3.4K Comments
Joined Dec 2009
RyanMPLSMar 25, 2026 5:58 PM
3.4K Comments
Got this Feb of 2025 and it works well for my Nissan that has excessive draw from the poorly installed remote start/alarm. Need to get to BBY and make 'em fix that some day. Doesn't do much in the winter especially under 6" of snow though (duh).

edit: price was 15.59 at that time
Mar 26, 2026 1:00 AM
390 Comments
Joined May 2014
stevesavesMar 26, 2026 1:00 AM
390 Comments
I didn't know you could charge through OBD port. Is OBD a standard for any make or would this work on Porsche?
Mar 26, 2026 2:47 AM
128 Comments
Joined Jan 2023
itsjoemoneyMar 26, 2026 2:47 AM
128 Comments
Quote from Willingbacon View quoted comment :
Bought this for my F-150 as the system was complaining that my 12v battery was running low. Plugged this in and I no longer get that notification. I just leave it on the dashboard plugged into my OBD II. Great trickle charger when no power is around.
Is it a newer truck? I'm reluctant to trickle charge through OBD on my 24 GMC that has so many electrical things going on. Even when I open the back door of the vehicle, I hear whirring and electrical sounds under the hood.
Mar 26, 2026 1:07 PM
2.1K Comments
Joined Mar 2014

This comment has been rated as unhelpful by Slickdeals users.

Mar 26, 2026 2:55 PM
53 Comments
Joined Nov 2018
InkjetpoweredMar 26, 2026 2:55 PM
53 Comments
I'm surprised something like this hasn't been integrated into a car/truck's factory design as a support option for the 12v battery.
Pro
Mar 26, 2026 4:28 PM
10.8K Comments
Joined Mar 2018
WooHoo2You
Pro
Mar 26, 2026 4:28 PM
10.8K Comments
Quote from Inkjetpowered View quoted comment :
I'm surprised something like this hasn't been integrated into a car/truck's factory design as a support option for the 12v battery.
While I don't disagree it wouldn't be useful (in the long term) however most new cars do not have the problem with failing batteries (unless defective) or people not using the vehicle for many months at a time necessitating such a device. I do think some motorhomes are starting to ship with them, UTV's and boats would also make more sense as all of them tend to be far more periodic use vs a consumer car / truck. From the manufacturer's (likely) perspective, it would simply add costs and protentional warranty failure points without increasing sales in any meaningful way. IMO at least.

*Not saying I wouldn't consider paying for such a feature.

Regarding this deal, upon a cursory search on Amazon for "Solar Car Battery Charger Maintainer." I'm seeing a lot of other options with battery wattage, reviews, etc for roughly the same price. Mostly minus the OBD-II Cable though, some do have a 12v cigarette adapter it place of the OBD (not to be confused with the ODB Wink ). Might be worth a look around to see if something fits your use case better before ordering.
Last edited by WooHoo2You March 26, 2026 at 09:32 AM.

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Mar 26, 2026 4:55 PM
2.3K Comments
Joined Jan 2009
arbitragerMar 26, 2026 4:55 PM
2.3K Comments
Quote from scotts9612 View quoted comment :
I bought this to charge my Tesla electric car
Rivian here. Works well. As a show piece
1
2
Mar 26, 2026 6:40 PM
234 Comments
Joined Apr 2011
Zip.ZapMar 26, 2026 6:40 PM
234 Comments
Quote from stevesaves View quoted comment :
I didn't know you could charge through OBD port. Is OBD a standard for any make or would this work on Porsche?

Regardless of where a vehicle is manufactured, OBDII is required on all vehicles sold in the US since 1996.
Vehicles sold in other countries may or may not have it is as a standard.
Last edited by Zip.Zap March 26, 2026 at 11:45 AM.
1
Mar 26, 2026 6:55 PM
372 Comments
Joined Oct 2005
handoggMar 26, 2026 6:55 PM
372 Comments
I too did not know charging was possible via obd2 port
Mar 27, 2026 1:24 AM
463 Comments
Joined Nov 2010

This comment has been rated as unhelpful by Slickdeals users.

Mar 27, 2026 7:04 AM
97 Comments
Joined Dec 2014
SeanEboyMar 27, 2026 7:04 AM
97 Comments
Quote from Inkjetpowered View quoted comment :
I'm surprised something like this hasn't been integrated into a car/truck's factory design as a support option for the 12v battery.
It actually was... on the Lazer Jet stand up jet ski! lol. So ahead of its time...
Mar 27, 2026 9:41 AM
102 Comments
Joined Nov 2014
djflex1987Mar 27, 2026 9:41 AM
102 Comments
Quote from jdr123 View quoted comment :
only 56 reviews and 11% are 1 star with a majority of these reviews saying the product does not work....ugh
Cheap China junk
3
Mar 27, 2026 11:39 AM
451 Comments
Joined Sep 2016
jmm1122Mar 27, 2026 11:39 AM
451 Comments
Could you use this with a portable power station like Bluetti for very slow, gradual charging?

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Pro
Deal Editor
Mar 27, 2026 2:21 PM
18.4K Comments
Joined May 2008
powerfuldopplerMar 27, 2026 2:21 PM
Pro
Deal Editor
18.4K Comments
Update: This popular deal is still available.

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