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30W 12V Solar Battery Maintainer & Trickle Charger

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Key Features

• 30W High-Efficiency Power Uses 30% efficient PERC monocrystalline cells for superior energy conversion

• 360° Optimal Adjustability Features a non-slip, fixable bracket to maximize solar capture for gate openers, fences, and pumps

• Extreme Weather Resilience IP68-rated design withstands 2400Pa wind and 3600Pa snow loads

• Durable Build Quality Combines 1.6mm tempered glass with a corrosion-resistant anodized aluminum alloy frame

• Compact Mounting Measures 15.9 × 18.2 × 0.8 ± 0.2 in and weighs 5.62 lb for versatile installation

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DescriptionSpecsIncludesDownloadsFAQReviews

30W 12V Solar Battery Maintainer & Trickle Charger

A+ monocrystalline cells, IP68 protection, and 3-stage charging reliably maintain 12V batteries for cars, RVs, boats, and motorcycles.

Callsun 30W solar battery trickle charger with stand, charging a car battery and maintaining a boat on a trailer in a garage driveway.

Why Choose Callsun Solar Panel

Feature Callsun Solar Panel Other Solar Panels
Efficiency 30% 20%
Installation 360° Flexible Installation 180° Flexible Installation
Waterproof IP68 IP65
Frame Anodized Aluminum Alloy General Aluminum Alloy
Glass 1.6mm Tempered Glass 0.6mm Tempered Glass

Rugged All-Weather Protection

IP68 waterproofing, impact-resistant glass, and corrosion-resistant aluminum withstand heavy snow, wind, and harsh outdoor conditions.

Callsun 30W solar panel feature infographic: IP68 waterproof, 2400Pa wind/5400Pa snow loads, tempered glass, and aluminum frame.

High-Efficiency Adjustable Design

30% efficiency, 360° adjustability, IP68 protection, anodized aluminum, and 1.6mm tempered glass deliver durable performance.

Callsun 30W solar panel comparison graphic showing high 30% efficiency, 360-degree adjustable angle, IP68 waterproof design, aluminum alloy, and tempered glass versus low efficiency alternatives.

360° Adjustable Solar Mount

360° adjustable mounting optimizes sun exposure for ground, wall, flat-roof, and sloped-roof installations.

Callsun 30W solar panel with 360-degree sun-tracking bracket mounted on outdoor walls, roofs, and rocky ground settings.

Advanced 12V Charging Protection

Multi-layer protection prevents overcharge, over-current, short circuits, overheating, reverse charging, and over-voltage during 12V battery charging.

Callsun 30W solar battery charger safety protection infographic showing LED indicator lights and safeguards for 12V batteries.

Long-Term Battery Maintenance

Reliable solar power prevents battery discharge, maintaining cars, trucks, and stored vehicles during extended periods of non-use.

Callsun 30W solar battery maintainer showing plug-and-play setup for charging a 12V car battery for stored vehicles.

Durable High-Efficiency Solar Design

High-efficiency monocrystalline cells, tempered glass, EVA, TPT, anodized aluminum, and IP68 protection ensure lasting performance.

Callsun 30W solar panel construction infographic highlighting 30% conversion efficiency, tempered glass, monocrystalline cells, and an IP68 waterproof rating.

Versatile 12V Battery Charger

Maintains 12V batteries for cars, RVs, boats, ATVs, motorcycles, trailers, pickups, lawn mowers, and water pumps.

Callsun 30W solar panel application guide showing use with cars, RVs, boats, motorcycles, trailers, pickups, lawn mowers, and water pumps.

Specifications

Key Specs at a Glance 30W output · 30% efficiency · Adjustable Angle(360°) · IP68

Mechanical Characteristics(STC)

Maximum Power (Pmax) 30W
Maximum Power Voltage (Vmp) 20.16V
Maximum Power Current (Imp) 1.49A
Open-circuit Voltage (Voc) 24.3V
Short-circuit Current (Isc) 1.57A
Cell Type Monocrystalline Silicon

*STC(Standard Test Condition): Irradiance 1000W/m², Cell Temperature 25°C, Air Mass 1.5.

Specifications

Dimension 403 × 463 × 20 ± 5 mm (15.9 × 18.2 × 0.8 ± 0.2 in)
Weight 2.55kg(5.62 lb)
Compatible with 12V LiFePO4, Lithium Ion, AGM, SLA, GEL, FLD, EFB, MF batteries
Glass 1.6mm Tempered Glass
Frame Anodized Aluminium Alloy
IP Rating IP68
Max. Wind Load/Snow Load 2400Pa/3600Pa
Connector Solar Connector Compatible

Includes

Downloads & View

User Manual

View Download

FAQ

1. Can I leave the solar charger connected all the time?

Yes. The built-in intelligent chip automatically switches between Bulk, Absorption, and Maintenance modes. Combined with the 6-point safety system, it prevents overcharging and allows safe 24/7 connection.

2. Do I need to purchase a separate charge controller for this 30W solar panel?

No. The 30W panel features a built-in smart controller, meaning you can connect the alligator clips or O-rings directly to your 12V battery without needing any external regulation hardware.

3. How does the 3-status LED system show the different charging stages?

The intuitive 3-status LED indicators change based on the internal chip's activity. They provide immediate visual feedback as the system automatically transitions through the Bulk, Absorption, and Maintenance modes.

4. What temperature range can this solar charger handle for year-round outdoor use?

Featuring an IP68 weather-sealed, full-potting design, the charger is engineered to maintain stable and reliable performance in extreme outdoor environments ranging from 14°F to 158°F (-10°C to 70°C).

  • 5 stars: 12 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
m
mous
Works great

Works great for keeping my quad charged up.

f
fred

great to use on extra car. have 2 and keeps up to months on charging.

J
Joey F.

I bought two, put them both out in the sun for a couple of days for a trial run. Both put out 20+ VDC, both controllers cut off at approx. 13.6 VDC. Have one panel and controller in service for a couple of months now on a gate operator, good so far.

J
John Sellers

Hooked it right up to a car battery and set it outside at noon on a sunny day, was charged in a couple hours. Stored in the shed, this still lights up as "in sunlight" just from the ambient light coming in through the windows. Quite a good solar panel.

P
PCTX
Great for the price

It does not come with a motorcycle plug adaptor for trickle charge maintenance. Had to make my own.

M
Mike Chrispyn

I was worried about this because the initial voltage, or pressure is very high. Like I don't know 30 volts or more? But the bottom line is it doesn't actually push that many volts in when connected. Apparently it's smart and knows what to do. I hooked it up and left it in the sun while on a business trip for like 9 days. I was mortified that this was going to fry my battery. When I got home everything was fine. Turn the key and the engine spun like a blender. I would recommend these for vehicles that you are going to leave outside for periods of time that made drain by themselves. Business travelers, campers, things like that. I will probably buy one or two more

B
Brian Sersaw, Sr.

I have been using two of these for about a month now, and they seem to be working excellent. I had to charge a 12v mower battery (it was just low on 230 cranking amps) and it was back to full power in a day. And, yes, I have used the batteries after charging and they are working fine. I just use these to keep a couple of batteries ready for emergencies, and to run a 12v water pump on occasion. So far, it has worked perfectly for me, but it may not be the best option if you need a battery charged quickly. For just keeping a battery charged and maintained, which is all i am doing, it is working great.

R
RudeDog

This is my first purchase from Callsun as I work nearby and noticed the store after the sign went up on the building. I researched about the company and After a few weeks of much anticipation the store had a soft opening. On my day off I paid them a visit and I was very impressed with what the store had to offer. however, I noticed the online presence had many more items available. Including the option to use Paypal and an expedient delivery system, I find it just as easy to shop at home equivalent to Amazon. Callsun gets a thumbs up in hopes the store does very well. Thank You RudeDog

t
tim hamilton

Sell the charger works. Great. It seems to be very good quality. It's easy to set up overall great product.

R
RR

Would highly recommend it

k
kt

Works great. I like it !!!

p
pbs

it works can go up to 35w even tough its a 30 w so better than advertized