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SUNER POWER 20W 12V Solar Battery Charger & Maintainer

Curated from 125 real Reddit conversations

Refreshed on: March 19, 2025

SUNER POWER 20W 12V Solar Battery Charger & Maintainer

Brand: SUNER POWER

Price: $85

Snoop Score:

7.3

Sentiment

7.1

Popularity

5.5

Technical

8.0

Buy on Amazon for $85 See All Solar Battery Chargers & Charging Kits Reviews

As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

The SUNER POWER 20W 12V Solar Battery Trickle Charger & Maintainer PRO is designed to efficiently charge and maintain 12-volt batteries using solar energy. Equipped with advanced MPPT technology and multiple safety features, it ensures optimal performance and longevity for various battery types. Consumers have noted the impressive high tracking efficiency of the MPPT technology, with one user mentioning, "Yes the solar panel will keep it charged as long as it gets some sun every day." Additionally, the charger is praised for its easy plug-and-play setup and wide compatibility with various battery types, making it a fantastic purchase for outdoor enthusiasts, as highlighted by one user who stated, "Fantastic purchase that I use when I head out doing Bushcraft." However, some users have expressed concerns about slow charging times, with comments like, "What part of 'it takes basically a day to charge,' was unclear?" Despite some negative feedback regarding charging speed, the SUNER POWER 20W Solar Battery Charger is highly recommended for its category due to its effective technology, safety features, and ease of use, making it a reliable choice for battery maintenance.

Not for you? Check out our other rated Solar Battery Chargers & Charging Kits

Do I need a trickle charger/maintainer if my RV has a solar panel?
Positive Feedback

What part of "it takes basically a day to charge", was unclear?
Negative Feedback

7.3

SUNER POWER 20W 12V Solar Battery Charger & Maintainer

Buy on Amazon for $85

Vehicle Battery Maintenance

8 / 10

Marine and RV Applications

9 / 10

Off-Grid Power

8 / 10

Battery Preservation

6 / 10

See how this compares to all Solar Battery Chargers & Charging Kits

What it does well!

Key strengths users can’t stop talking about.

High tracking efficiency with MPPT technology

“Do I need a trickle charger/maintainer if my RV has a solar panel?”➕

“Yes the solar panel will keep it charged as long as it gets some sun every day.”➕

Safe charging with built-in protections

“Not a dumb question at all!”➕

Easy to use with plug and play setup

“If you have a lithium battery and a cutoff switch, you don't need to trickle charge in storage.”➕

Wide compatibility with various batteries

“On bright, sunny days you may be fine, but a few cloudy days and you may be in the hole.”➕

Fantastic purchase for outdoor use

“Fantastic purchase that I use when I head out doing Bushcraft.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.

Takes too long to charge from solar

“What part of "it takes basically a day to charge", was unclear?”➕

“It takes basically a day to charge it.”➕

Compare On All Talked About Dimensions

Product Name	Price	Score	See Details	Buy Now
ZOUPW 30W 12V Solar Battery Charger	$69	8.6	Details	Buy
POWOXI Upgraded 7.5W Solar Battery Trickle Charger	$39	7.5	Details	Buy
SUNER POWER Waterproof 12W 12V Solar Battery Charger	$50	7.3	Details	Buy
SUNER POWER 20W 12V Solar Battery Charger & Maintainer	$85	7.3	Details	Buy
Sun Energise 10W 12V Solar Battery Charger Maintainer PRO	$55	7.3	Details	Buy
SUNER POWER 30W 12V Solar Battery Charger Maintainer	$89	6.9	Details	Buy
POWOXI 12V Solar Car Battery Charger	$59	6.7	Details	Buy
Sunway Solar Car Battery Trickle Charger & Maintainer	$22	6.6	Details	Buy
SUNAPEX 12V Solar Battery Charge Kit	$21	6.4	Details	Buy
SUNAPEX 20W 12V Solar Panel Battery Charger Maintainer	$49	6.1	Details	Buy
Sun Energise 25W 12V Solar Powered Battery Charger & Maintainer	$89	4.4	Details	Buy
Renogy 10W Solar Trickle Charger Portable Battery Maintainer	$25	4.2	Details	Buy
Topsolar 10 Watt 12 Volt Solar Trickle Charger	$19	3.9	Details	Buy
Saillong 10W 12V Solar Car Battery Charger Maintainer	$19	3.9	Details	Buy
Sunway Solar 16FT Battery Charger Extension Cable Adapter	$16	2.4	Details	Buy
FlexSolar 20W 12V Solar Panel Battery Charger	$49	2.3	Details	Buy

Core Power Plays

The specs and strengths that make it shine.

Humorous remarks on charging methods.

“He forgot to plug the charger”➕

“Does he also plug a power strip into itself, and wonder why the other items plugged in won’t turn on?”➕

“Hey McFly you bojo! Hoverboards don’t work on water. Unless you’ve got POWERRR.”➕

“https://www.harborfreight.com/25-watt-solar-panel-63940.html”➕

Practicality of using solar for EV charging

“Can you charge an EV using portable solar panels? I did a Google search to see if you can purchase portable solar panels like the ones seen on campsites, trailers, etc.”➕

“Yes, but. To do it in any meaningful way requires far more panels than you might expect.”➕

“It takes them more than a day to charge a relatively small car battery.”➕

“no, it's not practical for a trans continental excursion.”➕

Discussion about solar charging effectiveness

“I thought it’d be cool if I could put solar panels on the roof and charge my ego batteries so I don’t have to carry them from the garage.”➕

“Personally would not invest in the solar charger adapter for the power station at this time.”➕

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.

Discussion on the feasibility of solar panels for whole-house backup power.

“Happy wife, etc.”➕

“Batteries stay full while the sun is out and the house runs on solar.”➕

“The house can run on solar while the batteries charge.”➕

“If you are using AC and trying to live normally, I don't see it.”➕

Discussion about solar panel weight for kayak setups.

“seems you are building a capsize machine.”➕

“rigid panels are far too heavy - they are at least two layers of sandwiched glass.”➕

“the weight of 4.2 pounds which seemed reasonable, albeit not with the current sunshade.”➕

Insights on the need for custom solutions for solar charging.

“you will need a custom built solution - something waterproof, lightweight, capable of being dropped, and probably need a boot controller.”➕

Discussion about solar charging setups for kayaks

“I am looking to build a solar charging array for the top of my sunshade and/or bow, that could trickle charge the battery during long trips in full sun or over multiple days if camping when charging is otherwise unavailable.”➕

“Current price: **$59.95** 👍”➕

“What kind of area are you planning to cover with the sunshade?”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’

Discussion about the practicality of solar charging.

“It's like a race between solar and phone battery. So who won?”➕

“Simplest is the kind that sits on a car dash and plugs in to a lighter socket.”➕

“You should get a dual battery charge controller rather than two single controllers.”➕

General queries about solar panel pricing and reviews

“Fakespot detects fake reviews, fake products and unreliable sellers using AI.”➕

Insights on ownership and financing options for solar systems.

“Most people who go solar are happy they did so, they are saving money and using renewable energy.”➕

“At the very least, make sure you understand the ins and outs of ownership, various loans, and lease / PPA options.”➕

“Know that loans provided by solar contractors are almost never as good as they look.”➕

“If you're going to do it, I'd strongly suggest you stay away from a leased systems unless you plan on living there forever.”➕

Confusion about battery maintenance in RVs

“Yeah you def should have a switch before and after the charge controller for this reason.”➕

“it's typically best to disconnect the panel from the controler before removing the battery.”➕

Discussion about the practicality of solar charging

“as a bonus I have kids and we go through a bunch of batteries at my home, so in addition to being better prepared in case power goes out I also get to save money in the long run.”➕

“It's nice when you have a 'closed loop' system like that.”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.

Efficiency of solar panels is often lower than expected.

“And the efficiency of a solar panel is like 15%-20%. So he is taking an 80% loss.”➕

“Any recommendation on an affordable solar rig that is easy to install permanently, or is easy to put up/take down after a sail.”➕

“+1 for Renogy - best performance and quality for the price point hands down.”➕

Concerns about charging efficiency and time requirements.

“the linked solar panel wouldnt do much other than trickle charge the battery, 24v 60ah lifepo is around 1500wh, so 20w would take 75 hours of good sun to charge.”➕

Concerns about charging efficiency and time requirements

“How long does it take to fully charge from solar alone?”➕

“Powerbank seems enough for that AA charger, but those solar panels look too light for either.”➕