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expired Posted by Red_Liz | Staff • Feb 11, 2025
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expired Posted by Red_Liz | Staff • Feb 11, 2025

ECO-WORTHY 7.5W Waterproof Solar Panel 12V Battery Trickle Charger Maintainer

$16

$31

48% off
Amazon
79 Comments 38,280 Views
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Deal Details
ECO-WORTHY US via Amazon has ECO-WORTHY 7.5W Waterproof Solar Panel 12V Battery Trickle Charger (Cars, Trucks, Boats, Lawn Mowers, RV, Tractors) on sale for $31.18 - $15.59 (50% off w/ promo code 50HWX8TU at checkout) = $15.59. Shipping is free with Prime or on $35+ orders.

Thanks to Slickdeals Staff Member Red_Liz for finding this deal.

Product Info:
  • A+ grade monocrystalline silicon wafers have a conversion efficiency of up to 23% to maintain a consistent output of 7.5W.
  • The solar panel is bendable to fit windscreens and has a strong hold on the 4 PVC suction cups.
  • IP64 waterproofing and UV protection.

Editor's Notes

Written by SlickDealio | Staff
  • About the deal:
    • This matches the previous +35 Frontpage Deal in December 2024.
    • Please see the original post for additional details and give the WIKI and forum comments a read for helpful discussion.
  • About the product:
    • This has a 4.3 out of 5 star overall rating based on over 100 reviews.
  • About this Store:

Original Post

Written by Red_Liz | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
ECO-WORTHY US via Amazon has ECO-WORTHY 7.5W Waterproof Solar Panel 12V Battery Trickle Charger (Cars, Trucks, Boats, Lawn Mowers, RV, Tractors) on sale for $31.18 - $15.59 (50% off w/ promo code 50HWX8TU at checkout) = $15.59. Shipping is free with Prime or on $35+ orders.

Thanks to Slickdeals Staff Member Red_Liz for finding this deal.

Product Info:
  • A+ grade monocrystalline silicon wafers have a conversion efficiency of up to 23% to maintain a consistent output of 7.5W.
  • The solar panel is bendable to fit windscreens and has a strong hold on the 4 PVC suction cups.
  • IP64 waterproofing and UV protection.

Editor's Notes

Written by SlickDealio | Staff
  • About the deal:
    • This matches the previous +35 Frontpage Deal in December 2024.
    • Please see the original post for additional details and give the WIKI and forum comments a read for helpful discussion.
  • About the product:
    • This has a 4.3 out of 5 star overall rating based on over 100 reviews.
  • About this Store:

Original Post

Written by Red_Liz | Staff

Community Voting

Deal Score
+41
Good Deal
Visit Amazon

Price Intelligence

Model: ECO-WORTHY Upgraded 7.5W 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 

Sale Price
Slickdeal
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Current Prices

Sort: Lowest to Highest | Last Updated 6/14/2025, 02:51 AM
Sold By Sale Price
Amazon$29.89
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Top Comments

FairWinter2721
i own this. one advantage is that it came with both alligator clips AND a very handy OBD2 connector. the OBD2 allows charge thru OBD2 port as an option.
MultiMatrix
I don't see anywhere on the product page that shows it includes odb2 charging adapter...

Edit: I decided to purchase anyway and just received the unit, and it did come with an ODBII adapter. you were absolutely right FairWinter. Thank you!
big mike
This is not correct, solar panels not exposed to light most definitely USE electricity, also most of these have status lights or other circuits that use electricity. If the panel isn't working right to create electricity (or isn't exposed to enough light during the day) it's definitely possible for it to drain a battery. Better/industrial systems have controllers that shut the panels off at night so they aren't using power out of the storage system.

78 Comments

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Feb 11, 2025
293 Posts
Joined May 2023
Feb 11, 2025
FairWinter2721
Feb 11, 2025
293 Posts

Our community has rated this post as helpful. If you agree, why not thank FairWinter2721

i own this. one advantage is that it came with both alligator clips AND a very handy OBD2 connector. the OBD2 allows charge thru OBD2 port as an option.
4
Pro
Feb 11, 2025
532 Posts
Joined Feb 2020
Feb 11, 2025
MultiMatrix
Pro
Feb 11, 2025
532 Posts

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

Quote from FairWinter2721 :
i own this. one advantage is that it came with both alligator clips AND a very handy OBD2 connector. the OBD2 allows charge thru OBD2 port as an option.
I don't see anywhere on the product page that shows it includes odb2 charging adapter...

Edit: I decided to purchase anyway and just received the unit, and it did come with an ODBII adapter. you were absolutely right FairWinter. Thank you!
Last edited by MultiMatrix February 12, 2025 at 01:05 PM.
3
1
Feb 12, 2025
5,110 Posts
Joined Jul 2017
Feb 12, 2025
Luigis3rdcousin
Feb 12, 2025
5,110 Posts
Was just litterally looking at this one a couple days ago, and thought for 30$ not worth it. But for 15 now you're talking. Have a sitting car that I can't risk having a dead battery on
1
Feb 12, 2025
3,984 Posts
Joined May 2006
Feb 12, 2025
Arcticat
Feb 12, 2025
3,984 Posts
Bought one.....We'll see how it tests, not liking the review that says that it "Actually uses more energy than it makes. Would only recommend if you are trying to cycle drain your batteries before the warranty is up".
3
2
Feb 12, 2025
153 Posts
Joined May 2019

This comment has been rated as unhelpful by Slickdeals users.

Feb 12, 2025
2,495 Posts
Joined Dec 2010
Feb 12, 2025
slickernsnot
Feb 12, 2025
2,495 Posts
Quote from FairWinter2721 :
i own this. one advantage is that it came with both alligator clips AND a very handy OBD2 connector. the OBD2 allows charge thru OBD2 port as an option.
Can you check that again? According to the review AI on Amazon "This solar charger maintainer is designed to keep 12V batteries charged, but it does not support OBD2 connectivity or provide any OBD2 functionality."
However the reviews are all pretty dang good especially from the reviewers who seem to know what they're talking about. 15 bucks, seems worth it.
2
Feb 12, 2025
148 Posts
Joined Mar 2008
Feb 12, 2025
ryanmack
Feb 12, 2025
148 Posts
Coupon now only gives 25%
2

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Feb 12, 2025
683 Posts
Joined Apr 2008
Feb 12, 2025
BlueOvalStangGT
Feb 12, 2025
683 Posts
Any idea how efficient this would be in a shaded area? I'd love to have power to my boat but it's pretty well shaded and I don't know if this would put out any juice. Not looking for too much just to keep them topped off when it sits.
Feb 12, 2025
492 Posts
Joined Mar 2015
Feb 12, 2025
GinaG1983
Feb 12, 2025
492 Posts

Our community has rated this post as helpful. If you agree, why not thank GinaG1983

Fakespot Adjusted Rating is an "F" due to
Insufficient reliable reviews, so I wouldn't trust any of the 100 whatever reviews.
2
2
Expert
This user is an Expert in Home & Home Improvement
Feb 12, 2025
2,310 Posts
Joined Jan 2018
Feb 12, 2025
mwebb11111
Expert
This user is an Expert in Home & Home Improvement
Feb 12, 2025
2,310 Posts
Quote from ryanmack :
Coupon now only gives 25%
Instructions gave a code, it still does 50%.
Feb 12, 2025
745 Posts
Joined Jun 2008
Feb 12, 2025
briannaw
Feb 12, 2025
745 Posts
Quote from Arcticat :
Bought one.....We'll see how it tests, not liking the review that says that it "Actually uses more energy than it makes. Would only recommend if you are trying to cycle drain your batteries before the warranty is up".
I just bought the 5W to keep my car that I never drive topped off. Now I'm worried about this. Can anyone test it to see how much energy it actually uses?
1
Feb 12, 2025
161 Posts
Joined Jun 2011
Feb 12, 2025
neelagujarpuria
Feb 12, 2025
161 Posts
Quote from PurpleRecess7341 :
Bought one recently. Works really, really well. Super fast charging, brought my dead battery to life. Accidentally touched the positive clip and had a little shock just from it sitting on the dash as I was hooking stuff up. 😅
Not sure how someone gets shocked by a 12v panel
1
Feb 12, 2025
293 Posts
Joined May 2023
Feb 12, 2025
FairWinter2721
Feb 12, 2025
293 Posts
Quote from slickernsnot :
Can you check that again? According to the review AI on Amazon "This solar charger maintainer is designed to keep 12V batteries charged, but it does not support OBD2 connectivity or provide any OBD2 functionality."
However the reviews are all pretty dang good especially from the reviewers who seem to know what they're talking about. 15 bucks, seems worth it.
ordered mine within the past few weeks. description did not indicate this feature. BUT, arrived with OBD2 and Clamps. Hope this helps.
Feb 12, 2025
266 Posts
Joined Mar 2006
Feb 12, 2025
sky7
Feb 12, 2025
266 Posts
Quote from neelagujarpuria :
Not sure how someone gets shocked by a 12v panel
Try touching your tongue on the two terminals of a 9 volt battery
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Feb 12, 2025
5,110 Posts
Joined Jul 2017
Feb 12, 2025
Luigis3rdcousin
Feb 12, 2025
5,110 Posts
Quote from Arcticat :
Bought one.....We'll see how it tests, not liking the review that says that it "Actually uses more energy than it makes. Would only recommend if you are trying to cycle drain your batteries before the warranty is up".
I would ignore that review because that's simply not possible with solar lol. Power is one way.

Unless they connected it backwards. OR they didn't remove the plastic wrapping from the metal tongs and the battery drained because it didn't get power. I had a sibling replace his car battery and his car wouldn't start because he didn't remove the plastic from the battery terminals. There's lots of people like this out there.
Last edited by Luigis3rdcousin February 11, 2025 at 10:35 PM.
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