20W rigid monocrystalline solar panel

20W rigid monocrystalline solar panel

This 20W rigid monocrystalline solar panel is designed for small photovoltaic systems, battery maintenance and auxiliary loads. Its compact size suits vehicles, sheds, lighting systems, telemetry and educational projects.

Why choose this 20W solar panel?

It combines high-efficiency monocrystalline cells with a robust aluminium frame, tempered glass, EVA encapsulation and backsheet. It is a practical compact solution where mounting space is limited.

Main benefits

• 20W nominal power for small loads and battery maintenance.
• Compact 480 × 240 × 25mm size and 1.4kg weight.

Technology explained

Monocrystalline cells convert solar radiation into direct current with a stated cell efficiency of 22%. The aluminium frame provides rigidity while tempered glass protects the cells in normal outdoor conditions.

Recommended applications

12V battery maintenance, small off-grid systems, lighting, sheds, vehicles, boats, telemetry, signage and educational projects, always through a compatible solar controller.

Compatibility

Use a PWM or MPPT controller whose PV input accepts an open-circuit voltage above 21.75V, short-circuit current above 1.17A and at least 20W. The technical sheet specifies no factory-fitted connector.

How to check compatibility in 30 seconds

1. Check that 480 × 240mm of space and a suitable rigid mounting surface are available.
2. Verify that the controller accepts more than 21.75V Voc and 1.17A Isc.
3. Confirm battery voltage and the charging profile configured in the controller.
4. Choose suitable connectors, protection devices and cable size.

Installation recommendations

Install away from shade with suitable orientation and tilt, rear ventilation and fixings that do not distort the frame. Observe polarity and isolate the circuit before connecting.

Charging recommendations

Do not connect the panel directly to a battery. Use a controller compatible with the battery voltage and chemistry, with the correct charging profile and protection.

Storage recommendations

Before installation, keep it dry, clean and protected from impact. Do not place weight on the glass or junction box.

How to extend service life

Clean the glass with non-abrasive products, inspect wiring, fixings and junction box periodically, and avoid persistent shading, impacts and mechanical stress.

Temperature effects

Actual output varies with irradiance, orientation, shade and temperature. The stated operating range is −40 to +80°C; adequate ventilation helps reduce heat-related losses.

Technical specifications

Frequently asked questions

Can it charge a 12V battery?

Yes, through a compatible, correctly configured solar controller.

Can it be connected directly to a battery?

No. A solar controller must be installed between panel and battery.

Which controller is required?

One accepting more than 21.75V Voc, more than 1.17A Isc and at least 20W.

Does it include connectors?

The technical sheet specifies a 400mm, 2.5mm² cable but no factory-fitted connector.

Can it maintain a vehicle battery?

Yes, when correctly sized and used with an appropriate controller.

Is it flexible?

No. It is a rigid panel with aluminium frame and tempered glass.

What maintenance is needed?

Gentle glass cleaning and periodic checks of the cable, fixings, frame and junction box.