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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 29, 2026 12:54 PM
4 Comments
Joined Jan 2017
RealFastV6Mar 29, 2026 12:54 PM
4 Comments
I have the same panel, but I use it with the cig lighter plug since mine doesn't shut off with the vehicle. I have a truck I don't drive all that often, sometimes goes 2-3 weeks without driving. This works perfect to keep it topped off. I bought it because in cold weather it would crank real slow if I didn't start it a few weeks.

For the naysayers about the 10W, a battery tender jr is only an 800ma trickle, which is 9.6W at 12V. If you don't know the difference between a battery charger and a battery maintainer then you probably shouldn't be commenting.
1
Mar 29, 2026 1:22 PM
156 Comments
Joined May 2024
CurtitoutMar 29, 2026 1:22 PM
156 Comments
Quote from GarrettM6420 View quoted comment :
It's e-waste because it's useless. Meaning you're going to buy it and throw it away because it's useful for nothing more than the landfill. I'm trying to save you $24 genius. The product doesn't work. But go ahead and rage buy it because the "woke hive mind" and big words scare you.

Since you're in to buying dumb stuff, I've got ocean front property in Arizona if you're interested.
I have 4 of these. My occasional use Truck, Van and two mowers. They works just as intended, keeps batteries at about 12.75 volts all year. Batteries range from 4 years to 1 year old. I have had them ranging from 3 to 1 years. On the vehicles I just run to battery with clips. On mowers I cut cables, spliced in 15 ft 16g outdoor lighting wire for more length and use clips. The vehicle ones are just on dash and mowers are outside screwed to poles. This is just me, YMMV. I used to respect reviews here, still do some but...... Every year it gets less informative and more personal........
Mar 29, 2026 3:16 PM
16 Comments
Joined Mar 2017
Robin00Mar 29, 2026 3:16 PM
16 Comments
I use this on my car through the OBD2 port since it sits outside and only gets driven every few weeks, plus it's had parasitic drain issues in the past. The car starts up right away. I wish I knew about this sooner.
Mar 29, 2026 6:12 PM
29 Comments
Joined Dec 2011
bmwe30nutMar 29, 2026 6:12 PM
29 Comments
Not specific to this unit, but we have a car (actually a couple back-up vehicles) that has been sitting. Bought a solar panel for it, but to connect, you can get a 'wired in' connection to your battery (loops go on the battery terminal bolts). I'll either plug in a regular trickle charger (Wrangler that mostly sits, but is near an outlet) or will use the wired in connection and put the solar panel outside the car (connection just sticks outside the hood). I don't think trying to charge through the OBD would be a good thing.
Mar 29, 2026 8:41 PM
491 Comments
Joined Jul 2008
PauseAndConnectMar 29, 2026 8:41 PM
491 Comments
I did not know OBD port can charge the car battery?
So this would the product to use if you park the car outside for months and no one is able to help start the car?
Mar 30, 2026 5:49 PM
840 Comments
Joined Jul 2011
Voodoo22007Mar 30, 2026 5:49 PM
840 Comments
Unfortunately this one wasn't tested by Project Farm, but Eco-worthy is a known Chinese brand at least. I may give this one a go just to see and have a backup.
Deal Editor
Mar 30, 2026 7:19 PM
23.8K Comments
Joined Aug 2014
qwikwit
Deal Editor
Mar 30, 2026 7:19 PM
23.8K Comments
This deal is still available.

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Mar 30, 2026 8:03 PM
114 Comments
Joined Aug 2007
sl001Mar 30, 2026 8:03 PM
114 Comments
Quote from GarrettM6420 View quoted comment :
Please do any amount of research on like products. 10w is a laughable amount of electricity. This product is nothing more than e-waste. People have tested and deemed like systems to not even be enough to sustain a change on a modern day cell phone. Half of these comments about "this worked amazing" are shills/paid actors or people who haven't the slightest clue of the actual impact this would have but can't help but consume products.
You sir, are grossly misinformed.
I don't know if this particular device works, but if it functions at spec, it's 100% for a battery maintainer. The purpose is not to charge a dead battery, it's to keep an already charged battery from draining.
Mar 30, 2026 8:22 PM
107 Comments
Joined Apr 2014
theresanothertd10Mar 30, 2026 8:22 PM
107 Comments
Quote from Pumpkinator View quoted comment :
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.
I have the same one, but according to the lights diagram, the blue and red lights are supposed to light up when charging and JUST the blue when not charging. Mine seems to be the opposite and while not charging, I see blue and red, and while charging, just blue. This difference has me confused if it's even working correctly or not. How does yours act?
Mar 30, 2026 8:24 PM
185 Comments
Joined Dec 2010
OJ47Mar 30, 2026 8:24 PM
185 Comments
Quote from GarrettM6420 View quoted comment :
It's e-waste because it's useless. Meaning you're going to buy it and throw it away because it's useful for nothing more than the landfill. I'm trying to save you $24 genius. The product doesn't work. But go ahead and rage buy it because the "woke hive mind" and big words scare you.Since you're in to buying dumb stuff, I've got ocean front property in Arizona if you're interested.
You seem awfully sure and a bit upset regarding a product it doesn't seem you've ever tried?

While I agree there's probably some shills in this thread, I can confirm that this item actually works. I found and bought it on my own to fix a problem I was having. My truck wouldnt turn it on unless I drove it once a week; now it cranks up fine every time.
Mar 30, 2026 8:48 PM
294 Comments
Joined Dec 2007
mrseibenMar 30, 2026 8:48 PM
294 Comments
Looks like a handy product to have, at a great price. My issue I live in Northeast Ohio and the sun only shine about 25% of the time.
Mar 30, 2026 9:29 PM
1.5K Comments
Joined Sep 2011
XoblaimMar 30, 2026 9:29 PM
1.5K Comments
personally it's safer to do the battery instead of ODBII IMO.
Mar 30, 2026 11:42 PM
769 Comments
Joined Jun 2018
OlivePenguin524Mar 30, 2026 11:42 PM
769 Comments
Quote from itsjoemoney View quoted comment :
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.
I had something like this hooked up to my Jeep and it had a voltage of like 18v and not 15v which is normal charging voltage. I would not recommend using something like this unless you make sure you don't turn on your car while plugged in.
Mar 31, 2026 4:13 AM
620 Comments
Joined Dec 2007
androidMar 31, 2026 4:13 AM
620 Comments
I have the 7.5-watt version of this, and I have to say it was life-changing.

I have an older Camry that has a very slight parasitic battery drain from an aftermarket proximity locking system. I drive maybe 2 or 3 times a week on average.

Before I got this I had to leave my battery plugged into a trickle charger, or I'd end up with a dead battery.

I bought this, mounted it into my moon roof, ran the wiring through my molding to the OBD port. I haven't had a dead battery since.

This one was the only one that worked with my car, as my cigarette jack is turned off when the car is off.

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Mar 31, 2026 4:25 AM
1.9K Comments
Joined Mar 2004
skull leaderMar 31, 2026 4:25 AM
1.9K Comments
Will this work with OBD 1? 92 civic owner.

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