20W 12V Solar Battery Maintainer & Trickle Charger
Key Features
• 20W Rapid Charging utilizes 30% efficient PERC monocrystalline cells for superior energy replenishment
• Flexible 360° Installation allows for precise angle adjustments to maximize daily solar energy capture
• Extreme Weather Resilience is guaranteed by an IP68-rated design that withstands 2400Pa wind and 5400Pa snow loads
• Rugged Build Quality features 1.6mm tempered glass and a corrosion-resistant anodized aluminum alloy frame
• Universal 12V Battery Support is compatible with LiFePO4, Lithium Ion, AGM, SLA, GEL, FLD, EFB, and MF chemistries
20W 12V Solar Battery Maintainer & Trickle Charger - 1 Pack is backordered and will ship as soon as it is back in stock.









Delivery time: 3-8 business days.



30-Day Return and Refund Service
Warranty Coverage
Free Shipping20W 12V Solar Battery Maintainer & Trickle Charger
Boost your 12V batteries with Callsun 20W high-efficiency solar charger. Featuring A+ monocrystalline cells, IP68 all-weather durability, smart 3-stage charging, and wide battery compatibility, it keeps your cars, RVs, boats, and motorcycles powered and ready, anytime, anywhere.
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 |
Specifications
Key Specs at a Glance 20W output · 30% efficiency · Adjustable Angle(360°) · IP68
Mechanical Characteristics(STC)
| Maximum Power (Pmax) | 20W |
|---|---|
| Maximum Power Voltage (Vmp) | 20.23V |
| Maximum Power Current (Imp) | 0.99A |
| Open-circuit Voltage (Voc) | 24.37V |
| Short-circuit Current (Isc) | 1.04A |
| Cell Type | Monocrystalline Silicon |
*STC(Standard Test Condition): Irradiance 1000W/m², Cell Temperature 25°C, Air Mass 1.5.
Specifications
| Dimension | 303 × 408 × 20 ± 5 mm (11.9×16.01×0.8 ± 0.2 in) |
|---|---|
| Weight | 1.95kg(2.3lb) |
| 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 |
Includes
Downloads & View
User Manual
FAQ
1. What types of batteries are compatible with this 12V solar charger?
This smart 12V solar charger works with LiFePO4, Li-ion, AGM, SLA, GEL, FLD, EFB, and MF batteries. It's suitable for cars, RVs, boats, motorcycles, campers, lawn mowers, trailers, water pumps, and electric fences.
2. What is the purpose of the corner guards on this solar panel?
The integrated corner guards provide dedicated drop protection, shielding the tempered glass and aluminum frame from impact damage during transport, setup, or accidental drops in harsh outdoor environments.
3. What happens if I accidentally reverse the polarity or cause a short circuit?
The built-in controller features a 6-in-1 protection system. If you reverse the alligator clips or cross the wires, the safety circuit automatically cuts off power to prevent any damage to your battery or the charger.
4. How does the included 360° adjustable mount help with installation?
The 360° swivel mount allows you to adjust the angle of the solar panel flexibly. To maximize charging efficiency, use the included hardware kit to mount it in a location where it can face direct sunlight without shade.
20W 12V Solar Battery Maintainer & Trickle Charger - 1 Pack is backordered and will ship as soon as it is back in stock.









