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Sun Energise 25W 12V Solar Powered Battery Charger & Maintainer

Curated from 129 real Reddit conversations

Refreshed on: December 17, 2024

Sun Energise 25W 12V Solar Powered Battery Charger & Maintainer

Brand: Sun Energise

Price: $89

Snoop Score:

4.4

Sentiment

7.0

Popularity

5.7

Technical

3.0

Buy on Amazon for $89 See All Solar Battery Chargers & Charging Kits Reviews

As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

The Sun Energise 25W 12V Solar Powered Battery Charger & Maintainer is designed to harness solar energy for charging and maintaining various 12V batteries, making it ideal for vehicles, boats, RVs, and more. With features like a built-in smart MPPT charge controller and robust waterproof design, it offers efficiency and durability for outdoor use. Consumer feedback highlights several strengths of the Sun Energise charger, such as its high charging efficiency and ease of installation. Users appreciate that "a 3.6 kW solar system will likely be producing a lot of useful output below that threshold" and find it beneficial even during low sunlight conditions. Many also note the device's compatibility with multiple battery types, emphasizing that the system works better when integrated with a battery. Overall, the Sun Energise 25W solar battery charger is highly recommended for its category, particularly for those looking for an efficient and easy-to-use solar charging solution. While some users caution about limitations in heavily wooded areas, the advantages and positive user experiences suggest it is a solid investment for solar power enthusiasts.

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

I think it's worth getting solar power even if the panels provide 10% of their potential.
Positive Feedback

If you aren't getting much sun, solar really doesn't make a lot of sense.
Negative Feedback

4.4

Sun Energise 25W 12V Solar Powered Battery Charger & Maintainer

Buy on Amazon for $89

Vehicle Battery Maintenance

2 / 10

Marine and RV Applications

2 / 10

Off-Grid Power

8 / 10

Battery Preservation

1 / 10

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

What it does well!

Key strengths users can’t stop talking about.

Solar power is beneficial even with low output

“I think it's worth getting solar power even if the panels provide 10% of their potential.”➕

Works well with battery integration

“If you add a battery into this setup it will work better.”➕

Usable power even during low output times

“A 3.6 kW solar system will likely be producing a lot of useful output below that threshold (mornings and evenings, cloudy days).”➕

Allows for flexibility with adjustable charge rates

“You would need an EVSE that can adjust its charge rate to match what is coming in from the solar panel inverter.”➕

High efficiency of charging

“What happens when utility power goes out and you have solar but no battery Curious what happens when”➕

“on a sunny day I easily have 20A of excess, plenty to charge with margin.”➕

“What's the deal with solar/batteries for whole-house backup power? I'm looking at getting a solar pa”➕

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

Easy installation process

“if we lose power, I only have critical loads. But hey, I have my fridge, freezer, well pump and some lights and outlets - they’ve got nothing!”➕

“What kind of investment are we talking for a setup like this?”➕

Multiple battery compatibility

“The big issue is you can't put big circuits on it.”➕

“If I somehow use over 27kWh (90%) from sunset to sunrise, my power will go out.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.

Solar may not be effective in heavily wooded areas

“If you aren't getting much sun, solar really doesn't make a lot of sense.”➕

Direct connection to EVs is not possible

“You can't go direct. You need charge controllers and a charging system to convert from the solar to something the car battery can take.”➕

Peak output is not sustained throughout the day

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

System shuts down during power outages

“System shuts down.”➕

Need for additional hardware for full functionality

“If, big if, you purchase all the extra hardware on top of iq8 to get "sunlight backup".”➕

“This is the not-concerned-about-money scenario, so rough estimate - about $100k for a 3000 sqft house.”➕

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.

Discussion about combining solar with generator for efficiency

“I am thinking of using a solar system (solar batteries) with a generator to kick on & re-charge the batteries when they get to a low enough level.”➕

“even SOME solar input will help keep the batteries topped off when the property is unoccupied.”➕

“Make sure to have multiple ways of charging since your relying on one way of powering the house.”➕

Discussion on the need for charge controllers

“I want to charge the van throughout the day when its parked up from the sun as direct from solar > van as possible!”➕

Hidden Hero Hacks

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

Discussion about the feasibility of going off-grid with solar and batteries

“Can Solar and battery eliminate the need for a utility provider?”➕

“It's generally cheaper to stay with your utility and use your solar to offset your electricity usage, and a battery for emergency backup.”➕

“The cost is much less than the oversized battery system and your fuel costs are still quite low because it only runs for a handful of hours each year.”➕

“Many jurisdictions municipal/county codes won’t let you go off grid.”➕

Discussion about the feasibility of adding multiple solar charge controllers

“I'm wondering if I can run two controllers in parallel to a single battery bank.”➕

“Yes, multiple controllers and multiple other sources can all charge a single battery bank.”➕

“You can hook up multiple charge controllers, no problem.”➕

“If I use 2 MPPT controllers in total parallel, same pv same batteries and same load can I control one for day usage and one for night?”➕

Buyer’s Cheat Sheet

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

Concerns about battery maintenance in older vehicles

“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.”➕

“battery age and which brand/tier battery?”➕

Discussion on parasitic battery draw

“Not on a 2001. Maybe an 80s truck.”➕

“the battery is rarely ever 'dead'. The interior lights come on but there's not enough juice to start the engine.”➕

Discussion on the need for batteries with solar systems

“For best results you'll be needing batteries, too.”➕

“Solar will shut off without batteries.”➕

“Most solar inverters will not work off grid without batteries.”➕

“Solar backup requires some form of transfer switch with either a battery (most common) or a special solar inverter (uncommon).”➕

Discussion on electrical code requirements for solar systems

“It’s electrical code requirements that a grid tie inverter shut off if the incoming power goes off.”➕

Concerns about legal requirements for off-grid setups

“even if listed as rustic, primitive, etc. In some states that stuff is required by law.”➕

Recommendations for 12v smart battery chargers

“I believe I have a 70 amp version from a company in Florida.”➕

Concerns about the feasibility of solar during outages

“If it's a multi day outage, charging at the slower rates could be a lifesaver though.”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.

Discussion on the necessity of battery backup for solar systems

“I can’t fathom systems being built with zero battery backup.”➕

“It’s not a mess, it works amazingly well.”➕

“without batteries and no grid power, if you are using power and your solar production goes down, you would get brownouts.”➕

Concerns about grid-tied systems without batteries

“There are tons of grid-tied systems without batteries.”➕

“It seems silly to keep arguing the point when OP even thanked jj for the explanation.”➕

General chatter about solar system performance during outages

“Most people with solar installed do not have the kinds of batteries we’re talking about here.”➕

“So far, so good...”➕

Concerns about the true output of solar systems

“3.6 Kw is small but usable.”➕

Discussion on off-grid solar setups

“Off grid meaning you have either batteries, or self islanding with Enphase IQ8s that allow sunlight backup.”➕