Solar panel Victron Energy SPP040201200 20W 18.4V polycrystalline

Victron Energy SPP040201200 is a 20W polycrystalline solar panel with a nominal voltage of 18.4V and compact dimensions of 440 × 350 × 25 mm. Designed for small off‑grid systems, battery charging and auxiliary power, the panel is suitable for use on boats, caravans and remote equipment where reliable low-power energy generation is required. The module is prewired with MC4-compatible connectors and has an operating temperature range from -40 °C to 85 °C (without fasteners).

Advantages

The panel features a low voltage–temperature coefficient for improved high‑temperature performance and demonstrates high sensitivity to light, providing good low‑light output across the solar spectrum. It uses advanced EVA encapsulation with a triple‑layer back sheet for safe high‑voltage operation, high‑transmission tempered glass for stiffness and impact resistance, and a sturdy anodized aluminium frame for easy roof or surface mounting. Additional safety and reliability features include a sealed waterproof junction box, high‑performance bypass diodes to reduce shading losses, and a prewired quick‑connect system with MC4 (PV‑ST01) connectors. The product is backed by a 25‑year limited power output warranty and a 5‑year limited warranty on materials and workmanship.

Suitable for

• Small off‑grid systems and auxiliary power for 12V battery charging
• Marine use on boats and leisure craft
• Caravans, motorhomes and campervans
• Remote equipment, sensors and field devices
• Maintenance charging of lead‑acid and similar 12V batteries

Key specifications

• Model: Victron Energy SPP040201200
• Peak power: 20 W
• Nominal voltage: 18.4 V
• Open‑circuit voltage (Voc max): 21.96 V
• Short‑circuit current (Isc max): 1.18 A
• Dimensions: 440 × 350 × 25 mm
• Weight: 1.9 kg
• Operating temperature: -40 °C to 85 °C (without fasteners)
• Connector type: Prewired MC4 (PV‑ST01) compatible

How to use

Mount the panel on a stable surface or frame using suitable mounting hardware compatible with the anodized aluminium frame. Connect the prewired MC4-compatible leads to a charge controller or battery system designed for a 12V nominal battery bank; ensure correct polarity before connecting. Position the panel to maximize sun exposure and avoid permanent shading; use the panel with an appropriate solar charge controller to regulate charging and protect the battery. Follow local regulations and manufacturer's guidance for wiring, fusing and grounding when integrating into electrical systems.

Usage recommendations

For best long‑term performance, install the panel at an orientation and tilt that maximize annual sun exposure for your location, keep the glass surface clean of dirt and debris, and use a suitable MPPT or PWM charge controller matched to a 12V battery system. Periodically inspect connections, the junction box and frame for corrosion or damage, especially in marine environments.