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expiredRed_Liz | Staff posted Feb 11, 2025 03:46 PM
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expiredRed_Liz | Staff posted Feb 11, 2025 03:46 PM

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

$16

$31

48% off
Amazon
79 Comments 39,114 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
  • 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
  • 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 

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Top Comments

FairWinter2721
293 Posts
26 Reputation
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
573 Posts
83 Reputation
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
7274 Posts
1697 Reputation
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 12, 2025 04:58 PM
651 Posts
Joined Dec 2016
JoeBlo1979Feb 12, 2025 04:58 PM
651 Posts
Only see a 25% coupon that brings it down to $23.38

Also tried adding the coupon to the "Enter a gift card, voucher or promotional code" section and that didn't work. Is there another place to enter this?

Never mind, tried it a second time and it worked.
Last edited by JoeBlo1979 February 12, 2025 at 09:03 AM.
1
Feb 12, 2025 09:06 PM
573 Posts
Joined Feb 2020
MultiMatrixFeb 12, 2025 09:06 PM
573 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.
Updated my original comment. You were absolutely right. They really need to add that to their product information because it was almost a deal breaker. Thanks!
Feb 12, 2025 09:09 PM
5,473 Posts
Joined Jul 2017
Luigis3rdcousinFeb 12, 2025 09:09 PM
5,473 Posts
I forgot about this post and almost missed out. The coupon code didn't work but then I went back to the shopping cart and it showed the correct price. I don't know why it worked but it worked. Woohoo!
Pro
Feb 12, 2025 10:13 PM
1,228 Posts
Joined Aug 2005
nickdigger
Pro
Feb 12, 2025 10:13 PM
1,228 Posts
Quote from Luigis3rdcousin :
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.
The charger circuit, which tries to prevent overcharge, has to use battery power to stay alive and keep checking status. That will drain your battery if there's not enough sunlight to replace the amps it had to use.


Quote from SharkToothedGrin :
Quote from HonestPenguin348 :
Bought this, connected it up and my car battery was totally dead when I went to go move it later that night. Another solar charger years ago ruined my rpm gauge in my cluster …
No It did not.
It happened to me. I was working out of town one summer, and thought i'd be clever and leave a 1.5w solar charger on my car to keep the battery from dying. The first few months were fine, but after one hot month, i returned home and found my battery completely dead & unchargeable, and my instrument panel fvcked up (fuel gauge, and maybe temp too, i forget).

TLDR: don't trust these things long-term. Disconnect your battery and use a plug-in trickle charger.
1
Feb 12, 2025 11:03 PM
333 Posts
Joined Nov 2017
ZericFeb 12, 2025 11:03 PM
333 Posts
Quote from bluzcluz :
Can this panel be rigged to another device so it can connect to 110V devices for a direct charge? This is more cost effective than buying a portable generator. I would like to use it for camping or a day at the beach.
This is rated at 7.5W max, that's in ideal conditions so it's more likely to put out 5-6W. Running it directly through an inverter to 110V isn't going to work as solar doesn't provide stable voltage or current. Now, if one wanted to use it to charge a cell phone or tablet for example, one could convert it directly from "12V" (actual voltage will vary) to 5V using a buck converter such as this: https://www.amazon.com/dp/B0B8C5MT37
It would charge really slow as it just doesn't generate much power, but it should work.
Feb 12, 2025 11:22 PM
403 Posts
Joined May 2006
kalukolaFeb 12, 2025 11:22 PM
403 Posts
ordered because a few have commented that this comes with an OBDII adapter.
Feb 12, 2025 11:31 PM
36,376 Posts
Joined Jul 2006
monkeybizFeb 12, 2025 11:31 PM
36,376 Posts
could use this on my truck and car today in this cold sunshine. Thanks

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Feb 13, 2025 12:22 AM
112 Posts
Joined Nov 2008
BobLablawFeb 13, 2025 12:22 AM
112 Posts
I'd rather (and have) gone to harbor freight and for $20 get a trickle charger that plugs in
Feb 13, 2025 12:43 AM
103 Posts
Joined Jul 2003
ScottyWHFeb 13, 2025 12:43 AM
103 Posts
Quote from kalukola :
ordered because a few have commented that this comes with an OBDII adapter.
Same... Here's hoping... Could certainly come in handy.
Feb 13, 2025 01:03 AM
66 Posts
Joined Dec 2013
ChengC5391Feb 13, 2025 01:03 AM
66 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.
Scotty said don't mess with the OBD plug.
Feb 13, 2025 02:20 AM
3,272 Posts
Joined Jul 2013
madmax718Feb 13, 2025 02:20 AM
3,272 Posts
Quote from ChengC5391 :
Scotty said don't mess with the OBD plug.
This is kinda true. Anytime you plug anything into the OBD2 you have a chance to FUBAR your computer.

Some cars dont have constant 12V, and thus easier to keep this plugged inside.
Feb 13, 2025 03:41 AM
3,513 Posts
Joined Jan 2007
sreeves3Feb 13, 2025 03:41 AM
3,513 Posts
Quote from BobLablaw :
I'd rather (and have) gone to harbor freight and for $20 get a trickle charger that plugs in
I was thinking the same thing though I checked Amazon and saw some as low as $6.50: https://www.amazon.com/Automotive...0BC3STLXT/
Pro
Feb 13, 2025 07:11 AM
657 Posts
Joined Nov 2023
bluzcluz
Pro
Feb 13, 2025 07:11 AM
657 Posts
Quote from Zeric :
This is rated at 7.5W max, that's in ideal conditions so it's more likely to put out 5-6W. Running it directly through an inverter to 110V isn't going to work as solar doesn't provide stable voltage or current. Now, if one wanted to use it to charge a cell phone or tablet for example, one could convert it directly from "12V" (actual voltage will vary) to 5V using a buck converter such as this: https://www.amazon.com/dp/B0B8C5MT37
It would charge really slow as it just doesn't generate much power, but it should work.
Quote from Delawaresace :
Technically, yes you can. But you would need two more devices, not one. This solar panel turns photons into electrons. You would need a battery to store the electrons as DC power and then an inverter to convert the power from DC to AC. Basically, one of the portable generators you mentioned. There's no way to convert photons from the Sun directly into steady 110V 60Hz AC power. I don't think physics works that way.
So it's doable just have to be on standby to make sure nothing blows up, def no set it and forget it.
Feb 13, 2025 08:15 AM
372 Posts
Joined Jan 2010
thezenFeb 13, 2025 08:15 AM
372 Posts
Quote from icantsleep :
The same brand has the 10W model for $23.99 that also includes a cigarette lighter connector https://amazon.com/dp/B017K6PH1S
I heard the cigarette lighter socket often doesn't work properly for charging, does someone knows if it's true?

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Feb 13, 2025 02:36 PM
4,090 Posts
Joined Oct 2004
mrstangblbFeb 13, 2025 02:36 PM
4,090 Posts
Quote from sreeves3 :
I was thinking the same thing though I checked Amazon and saw some as low as $6.50: https://www.amazon.com/Automotive...0BC3STLXT/ [amazon.com]
I bought this one [amazon.com] for a generator battery and really like it. Now it has a 15% off coupon making it around $17. Well worth it!

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