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expired Posted by DesertGardener | Staff • Dec 19, 2024
expired Posted by DesertGardener | Staff • Dec 19, 2024

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

$16

$26

38% off
Amazon
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Deal Details
ECO-WORTHY US via Amazon has 7.5W ECO-WORTHY Solar Car Battery Charger Maintainer 12V Trickle Charger on sale for $25.99 - $10.40 with promo code 40FU8GAD at checkout = $15.59. Shipping is free with Prime or on $35+ orders.

Thanks to Staff Member DesertGardener for sharing this deal.

About this Item:
  • 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.

Editor's Notes

Written by SaltyOne | Staff

Original Post

Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
ECO-WORTHY US via Amazon has 7.5W ECO-WORTHY Solar Car Battery Charger Maintainer 12V Trickle Charger on sale for $25.99 - $10.40 with promo code 40FU8GAD at checkout = $15.59. Shipping is free with Prime or on $35+ orders.

Thanks to Staff Member DesertGardener for sharing this deal.

About this Item:
  • 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.

Editor's Notes

Written by SaltyOne | Staff

Original Post

Community Voting

Deal Score
+35
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

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Sort: Lowest to Highest | Last Updated 6/14/2025, 02:51 AM
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Top Comments

Items to note
Lighter is not constantly on in most newer vehicles. Plan panel location accordingly.
Length of wiring, which might restrict where you can place solar panel without buying an extension:

Length of Extension Cable 150cm(4.92ft)
Length of Alligator Clips Cable 50cm(1.64ft)
Length of Cigarette Lighter Plug Cable 50cm(1.64ft)
What was said is true, however if your phones car charger (or any other device that's powered through the cigarette lighter port) does not work when the vehicle is off, then this panel also will not charge the battery when the vehicle is off. So check that first if that's how you're planning to use this instead of the alligator clips directly to the battery.
I prefer the ones with ring terminals and an SAE connector. That allows you to install the ring terminal pigtails on the battery permanently and then just plug and unplug the vehicle at the SAE connector. The problem with the clips is that they often prevent you from shutting the hood completely while the mainter is connected. the ring terminals are low-profile, so it is esy to shut the hood.

This one is a bit more powerful and comes with included ring terminals.
https://www.amazon.com/gp/product...Y1SCN&th=1

53 Comments

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Dec 19, 2024
591 Posts
Joined Dec 2011
Dec 19, 2024
Lijebaley
Dec 19, 2024
591 Posts

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

Items to note
Lighter is not constantly on in most newer vehicles. Plan panel location accordingly.
Length of wiring, which might restrict where you can place solar panel without buying an extension:

Length of Extension Cable 150cm(4.92ft)
Length of Alligator Clips Cable 50cm(1.64ft)
Length of Cigarette Lighter Plug Cable 50cm(1.64ft)
7
1
Dec 20, 2024
1 Posts
Joined Dec 2024
Dec 20, 2024
glorious09
Dec 20, 2024
1 Posts
Cigarette lighters are basically unusable in newer cars, and charging the battery via alligator clips is the preferred option for the vast majority of people, like me!
5
Dec 20, 2024
199 Posts
Joined Jun 2019
Dec 20, 2024
SlickDeelz305
Dec 20, 2024
199 Posts
Honest question: so if you plug into the cigarette lighter (for ones that stay on) it helps keep the battery charged? I understand the alligator clips directly into the battery, but not the cig lighter plug…
Dec 20, 2024
73 Posts
Joined Nov 2018
Dec 20, 2024
Chriswisc12
Dec 20, 2024
73 Posts

Our community has rated this post as helpful. If you agree, why not thank Chriswisc12

Quote from SlickDeelz305 :
Honest question: so if you plug into the cigarette lighter (for ones that stay on) it helps keep the battery charged? I understand the alligator clips directly into the battery, but not the cig lighter plug…
The cigarette lighter outlet is usually directly connected right to the car battery (after running through the fuses and such).

So when you charge your phone or run your dash cam from the cigarette lighter outlet, it's pulling that energy straight from the car battery.

This solar panel delivers the current in the opposite direction and sends the energy back the other way toward the battery, which slowly charges it.
Last edited by Chriswisc12 December 19, 2024 at 06:39 PM.
3
4
Dec 20, 2024
199 Posts
Joined Jun 2019
Dec 20, 2024
SlickDeelz305
Dec 20, 2024
199 Posts
Quote from Chriswisc12 :
The cigarette lighter outlet is usually directly connected right to the car battery (after running through the fuses and such).

So when you charge your phone or run your dash cam from the cigarette lighter outlet, it's pulling that energy straight from the car battery.

This solar panel reverses the polarity and sends the energy back the other way toward the battery, which slowly charges it.
Thanks!
1
Dec 20, 2024
1,508 Posts
Joined Jun 2018
Dec 20, 2024
ScoobieSnax
Dec 20, 2024
1,508 Posts

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

Quote from SlickDeelz305 :
Thanks!
What was said is true, however if your phones car charger (or any other device that's powered through the cigarette lighter port) does not work when the vehicle is off, then this panel also will not charge the battery when the vehicle is off. So check that first if that's how you're planning to use this instead of the alligator clips directly to the battery.
4
Dec 20, 2024
1,155 Posts
Joined May 2015
Dec 20, 2024
Electricalsushi
Dec 20, 2024
1,155 Posts

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

Quote from Chriswisc12 :
The cigarette lighter outlet is usually directly connected right to the car battery (after running through the fuses and such).

So when you charge your phone or run your dash cam from the cigarette lighter outlet, it's pulling that energy straight from the car battery.

This solar panel delivers the current in the opposite direction and sends the energy back the other way toward the battery, which slowly charges it.
This is also why those 9V battery to cig lighter adapters work. Because it's directly energizing everything the battery was (like those stupid radios in the early 2000's that would lock if they lost power and you had to have a code to reset them).
1
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Dec 20, 2024
679 Posts
Joined Jul 2013
Dec 20, 2024
Hun-chan
Dec 20, 2024
679 Posts

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I prefer the ones with ring terminals and an SAE connector. That allows you to install the ring terminal pigtails on the battery permanently and then just plug and unplug the vehicle at the SAE connector. The problem with the clips is that they often prevent you from shutting the hood completely while the mainter is connected. the ring terminals are low-profile, so it is esy to shut the hood.

This one is a bit more powerful and comes with included ring terminals.
https://www.amazon.com/gp/product...Y1SCN&th=1
4
Dec 20, 2024
502 Posts
Joined Nov 2009
Dec 20, 2024
yokuyuki
Dec 20, 2024
502 Posts

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

These work great if your cigarette lighter is on while car is off. You'll have to check the manual for that. I had mine plugged in while I did street parking and only drove it once a week and it kept the battery topped off.
2
Dec 20, 2024
767 Posts
Joined Mar 2008
Dec 20, 2024
novemberr
Dec 20, 2024
767 Posts
Do I need to disconnect it when starting the engine and driving the car? Thanks
1
Dec 20, 2024
364 Posts
Joined May 2016
Dec 20, 2024
billironman1
Dec 20, 2024
364 Posts
Quote from yokuyuki :
These work great if your cigarette lighter is on while car is off. You'll have to check the manual for that. I had mine plugged in while I did street parking and only drove it once a week and it kept the battery topped off.
Just driving your car is what kept your battery charged that little thing would take all day to keep it topped off I would just wire it directly to the battery
1
Dec 20, 2024
589 Posts
Joined May 2020
Dec 20, 2024
aberro
Dec 20, 2024
589 Posts
This should not be called a charger, but a maintainer for a fully charged battery. If the battery is low, this will not bring it back up. Wattage is to low.

If your car is parked for a month or two, yep it will help "maintain" the battery charge, but won't recharge a weak battery. And as others have mentioned, the cigarette lighter may not work without key being on. Have to check that.
Dec 20, 2024
9,273 Posts
Joined May 2015
Dec 20, 2024
texst
Dec 20, 2024
9,273 Posts
How long would it take to fully charge a marine battery?
1
Dec 20, 2024
889 Posts
Joined Sep 2012
Dec 20, 2024
KamikazeKnifer
Dec 20, 2024
889 Posts
Quote from texst :
How long would it take to fully charge a marine battery?
It's not going to charge anything. It just offsets the natural discharge over time.
1
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Pro
Dec 20, 2024
2,238 Posts
Joined Nov 2010
Dec 20, 2024
MasterRigger
Pro
Dec 20, 2024
2,238 Posts
Quote from Lijebaley :
Items to note
Lighter is not constantly on in most newer vehicles. Plan panel location accordingly.
Length of wiring, which might restrict where you can place solar panel without buying an extension:

Length of Extension Cable 150cm(4.92ft)
Length of Alligator Clips Cable 50cm(1.64ft)
Length of Cigarette Lighter Plug Cable 50cm(1.64ft)
Plug your trickle charger into the obd port. Buy a obd cigarette plug. Obd is always on.
1
1

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