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SUNAPEX 20W 12V Solar Panel Battery Charger Maintainer

Curated from 98 real Reddit conversations

Refreshed on: November 2, 2024

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SUNAPEX 20W 12V Solar Panel Battery Charger Maintainer

Brand: SUNAPEX
Price: $49
Snoop Score:
6.1
Sentiment
8.3
Popularity
9.1
Technical
4.9
Buy on Amazon for $49See All Solar Battery Chargers & Charging Kits Reviews
As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

The SUNAPEX 20W 12V Solar Panel Battery Charger Maintainer is a portable, waterproof solar trickle charger designed to maintain and charge 12V rechargeable batteries in various applications, including vehicles, boats, and outdoor electronics. Users appreciate the built-in charge controller that prevents overcharging, with one user stating, "that setup kept them topped off perfectly," highlighting its efficiency in battery maintenance. Although some feedback mentions that solar panels charge slowly and are not suitable for direct phone charging, the overall sentiment suggests that the SUNAPEX solar panel is a recommended choice for those looking for a reliable solar charging solution in its category.

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

Best Solar Charger/Battery Bank Under $100?

Positive Feedback

Solar is slow and doesn't have enough amperage to quickly charge a phone, that's why it's used to charge batteries.

Negative Feedback
Product
6.1
SUNAPEX 20W 12V Solar Panel Battery Charger Maintainer
Buy on Amazon for $49
Vehicle Battery Maintenance
4 / 10
Marine and RV Applications
4 / 10
Off-Grid Power
3 / 10
Battery Preservation
3 / 10
See how this compares to all Solar Battery Chargers & Charging Kits

What it does well!

Key strengths users can’t stop talking about.
Built-in charge controller prevents overcharging
“Best Solar Charger/Battery Bank Under $100?”➕
“that setup kept them topped off perfectly.”➕
Lightweight and portable design
“I like the cut of your jib.”➕
High-efficiency solar charging
“Too much cynicism against solar panels...”➕
“Weather is fun.”➕
“A 20 watt panel should be more than enough.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.
Solar panels charge slowly
“Solar is slow and doesn't have enough amperage to quickly charge a phone, that's why it's used to charge batteries.”➕
Not suitable for direct phone charging
“Don’t use a solar panel to directly charge your phone.”➕

Compare On All Talked About Dimensions

Product NameImagePriceScoreCompareSee DetailsBuy Now
ZOUPW 30W 12V Solar Battery ChargerZOUPW 30W 12V Solar Battery Charger$69
8.6
DetailsBuy
POWOXI Upgraded 7.5W Solar Battery Trickle ChargerPOWOXI Upgraded 7.5W Solar Battery Trickle Charger$39
7.5
DetailsBuy
SUNER POWER Waterproof 12W 12V Solar Battery ChargerSUNER POWER Waterproof 12W 12V Solar Battery Charger$50
7.3
DetailsBuy
SUNER POWER 20W 12V Solar Battery Charger & MaintainerSUNER POWER 20W 12V Solar Battery Charger & Maintainer$85
7.3
DetailsBuy
Sun Energise 10W 12V Solar Battery Charger Maintainer PROSun Energise 10W 12V Solar Battery Charger Maintainer PRO$55
7.3
DetailsBuy
SUNER POWER 30W 12V Solar Battery Charger MaintainerSUNER POWER 30W 12V Solar Battery Charger Maintainer$89
6.9
DetailsBuy
POWOXI 12V Solar Car Battery ChargerPOWOXI 12V Solar Car Battery Charger$59
6.7
DetailsBuy
Sunway Solar Car Battery Trickle Charger & MaintainerSunway Solar Car Battery Trickle Charger & Maintainer$22
6.6
DetailsBuy
SUNAPEX 12V Solar Battery Charge KitSUNAPEX 12V Solar Battery Charge Kit$21
6.4
DetailsBuy
SUNAPEX 20W 12V Solar Panel Battery Charger MaintainerSUNAPEX 20W 12V Solar Panel Battery Charger Maintainer$49
6.1
DetailsBuy
Sun Energise 25W 12V Solar Powered Battery Charger & MaintainerSun Energise 25W 12V Solar Powered Battery Charger & Maintainer$89
4.4
DetailsBuy
Renogy 10W Solar Trickle Charger Portable Battery MaintainerRenogy 10W Solar Trickle Charger Portable Battery Maintainer$25
4.2
DetailsBuy
Topsolar 10 Watt 12 Volt Solar Trickle ChargerTopsolar 10 Watt 12 Volt Solar Trickle Charger$19
3.9
DetailsBuy
Saillong 10W 12V Solar Car Battery Charger MaintainerSaillong 10W 12V Solar Car Battery Charger Maintainer$19
3.9
DetailsBuy
Sunway Solar 16FT Battery Charger Extension Cable AdapterSunway Solar 16FT Battery Charger Extension Cable Adapter$16
2.4
DetailsBuy
FlexSolar 20W 12V Solar Panel Battery ChargerFlexSolar 20W 12V Solar Panel Battery Charger$49
2.3
DetailsBuy

Core Power Plays

The specs and strengths that make it shine.
Discussion on battery performance in sunlight
“Batteries do not perform well in the sun. Also most of those combos are simply trash.”➕
Discussion on charging capabilities and efficiency of solar panels
“I guarantee that the actual capacity you get for $24 will be less than 25Ah.”➕
“the ones that are just attached to just the housing of the battery bank produce almost zero power.”➕
Discussion on efficiency of solar panels
“the efficiency of a solar panel is like 15%-20%. So he is taking an 80% loss.”➕
Humorous commentary on solar charging efforts
“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”➕
“Hijacking to ask a stupid question: how do we know the student wants to charge his phone later?”➕

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.
Discussion on optimal setups for solar power
“It’s 100% viable. But you just have to use a panel that will not brown out in low light.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’
Concerns about the practicality of solar power for charging
“Walk away from the idea buddy. Not worth your money or time.”➕
Experiences with portable battery banks
“The battery, fully charged, can then charge my phone about 3x over.”➕
“I love Anker batteries.”➕
Need for sunlight to charge
“You need sunlight.”➕
“There's no sun hitting the panels”➕
“Sun power needs well... The sun”➕
“They are red until they first get sunlight then they’re either green or yellow depending on the amount of light available (any or none respectively)”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.
Concerns about battery maintenance
“when I use a solar charger, the battery drains faster than without one.”➕
“Sounds like you either have a high parasitic draw or a bad battery.”➕
“If it's been run down quiet a few times the battery is probably shot.”➕
“This off-grid cabin has an energy wheel to help charge the solar-powered battery.”➕
Discussion on vehicle battery issues and parasitic draw
“Not on a 2001. Maybe an 80s truck.”➕
“When the issue occurs, the battery is rarely ever "dead".”➕
“battery age and which brand/tier battery?”➕
“I found this novel product online where a 10w solar panel charges a battery.”➕
Concerns about charging speed and efficiency
“So it works, but slowly.”➕
Concerns about effectiveness of solar-powered devices after storms
“Thanks for all the feedback. It looks like this is something that wouldn't help me -- I'm thinking I'd be better off just buying a couple more regular power banks.”➕
“Good investment in my opinion.”➕
“If you are looking for a cheap option for under $40 you can do a foldable panel something like this.”➕
“You are much better off getting a decent solar panel and using it to charge normal powerbanks.”➕
Concerns about practical applications of solar charging
“It's like a race between solar and phone battery. So who won?”➕
Concerns about practicality of solar power for charging
“if you have a slow drain you need to either disconnect a battery cable or use a quick disconnect switch to stop the drain.”➕

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