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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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Deal Details
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

Community Voting

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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 24, 2026 6:09 PM
118 Comments
Joined Nov 2011
ultimatinternetMar 24, 2026 6:09 PM
118 Comments
Incredible price. I have been trying to piece an overkill 100W version together for way more but needs to be on more cars. This price lets me do it on each easily.
4
Mar 24, 2026 7:16 PM
7 Comments
Joined May 2012
azndudeC2Mar 24, 2026 7:16 PM
7 Comments

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

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
10
Pro
Mar 24, 2026 7:31 PM
351 Comments
Joined Nov 2017
jdr123
Pro
Mar 24, 2026 7:31 PM
351 Comments

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only 56 reviews and 11% are 1 star with a majority of these reviews saying the product does not work....ugh
2
Mar 24, 2026 9:05 PM
450 Comments
Joined Dec 2007
PumpkinatorMar 24, 2026 9:05 PM
450 Comments

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I bought the 20w Flexsolar charger/maintainer a couple of weeks back, has very similar attachments and ways to charge. It was $30 at the time, now $33. Works great so far and nicely built.
3
Mar 24, 2026 9:30 PM
6 Comments
Joined Apr 2019
WillingbaconMar 24, 2026 9:30 PM
6 Comments

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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.
3
Mar 24, 2026 9:33 PM
286 Comments
Joined Jan 2015
chrispitudeMar 24, 2026 9:33 PM
286 Comments
Aww what the heck, in for 1. Thanks OP!
3
Mar 24, 2026 9:36 PM
1.2K Comments
Joined Jun 2014
USMCRMar 24, 2026 9:36 PM
1.2K Comments
$21.27 for business account
1

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Mar 24, 2026 9:58 PM
129 Comments
Joined May 2016
nodashiplMar 24, 2026 9:58 PM
129 Comments
im surprised a 10watt solar panel is enough.
1
1
Mar 24, 2026 10:26 PM
3K Comments
Joined Feb 2006
iluvmyshMar 24, 2026 10:26 PM
3K Comments
Quote from nodashipl View quoted comment :
im surprised a 10watt solar panel is enough.
It's just a trickle charge.
Mar 24, 2026 11:01 PM
233 Comments
Joined Jan 2016

This comment has been rated as unhelpful by Slickdeals users.

Mar 25, 2026 1:23 AM
6.6K Comments
Joined Feb 2004
armedmetallicaMar 25, 2026 1:23 AM
6.6K Comments
watching this - $5 off doesn't seem like a "deal" - but if it gets to $10 off, I just might bite.
1
Mar 25, 2026 1:44 AM
270 Comments
Joined Aug 2011
Dud321Mar 25, 2026 1:44 AM
270 Comments

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

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.
6
Mar 25, 2026 2:09 AM
185 Comments
Joined Dec 2010
OJ47Mar 25, 2026 2:09 AM
185 Comments

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

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.
5
Mar 25, 2026 2:59 AM
1.2K Comments
Joined Aug 2009
DfindingMar 25, 2026 2:59 AM
1.2K Comments
I don't know much about how it works
Would it overcharge and/or damage the battery (if left unattended)?

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Mar 25, 2026 5:38 AM
388 Comments
Joined Oct 2017
JasonR9389Mar 25, 2026 5:38 AM
388 Comments

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

I've got three of these on equipment and they keep the battery from draining, but it's NOT a charger, if you've got a dead battery this isn't what you need, which should be obvious.
1

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