• Solar panel 30W trickle charger 12V
  • Polycrystalline solar panel 30W
  • Solar trickle charger for RV boat
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AutoSmart Parts

Solar Panel 30W Trickle Charger, 12V Battery Maintainer for Car RV Boat with USB

Car stored for winter, caravan in the driveway? This 30W solar trickle charger keeps your 12V battery topped up without overcharging. No electrician required, no drain on your wallet.

$51.99 AUD
$63.99 AUD $51.99 AUD
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check Doubles output current vs similar size panels
check Works in poor light, internal diode stops night drain
check Overcharge and reverse discharge protection
check Withstands wind, snow, and temperature extremes

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Specifications

Power output: 30W
Voltage: 12V (for 12V batteries and 5V USB devices)
Size: 33.5 × 12.5 cm
Material: PET + polycrystalline silicon cell
Connections: Double headed alligator clip for battery, USB female for 5V devices
Protection: Overcharge, reverse discharge, internal anti leak diode
Environment: Wind, snow, and extreme temperature resistant

Compatible With

Vehicles: Cars, RVs, campers, tractors, motorbikes, snowmobiles, boats
Best for: Low power 5V or 12V trickle charging, maintaining battery during storage
Not for: High amp charging or large solar storage systems (use a 100W+ panel with MPPT controller for those)

What’s Included / Care Instructions

What's included:
• 1 × 30W portable solar panel
• 1 × Double headed alligator clip cable (for battery)
• 1 × USB female cable (for 5V devices)

Care:
• Wipe surface clean with damp cloth for max efficiency
• Position to face sun directly for best output
• Disconnect if storing indoors long term

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Quick Setup

1. Position the Panel

Place the panel where it gets the most direct sunlight (dashboard, roof, or angled toward the sun). Clean the surface for best output.

2. Connect to Battery

Attach the red alligator clip to battery positive (+), black to negative (-). Or use the USB cable to charge a 5V device directly.

3. Leave It Working

The panel will trickle charge automatically when the sun shines. Built in protections handle overcharge and night drain, so you can leave it connected long term.

Common Questions Before You Buy

Will 30W keep my car battery charged?
Yes for trickle charging during storage or to offset small parasitic loads (alarm, immobiliser, GPS). Not enough to recharge a fully drained battery or run high power accessories.
Can I leave it on the dashboard permanently?
Yes. The panel is heat and UV resistant, designed for permanent outdoor or in vehicle use. Overcharge protection means no risk to your battery.
Does it drain the battery at night?
No. The internal diode blocks reverse current flow when the sun goes down, so the panel only charges, never drains.
What about cloudy days or shade?
Output drops in low light but the panel still produces some current, enough to offset most parasitic loads. Direct sun gives best output.
Can I charge a phone with it?
Yes. Use the included USB female cable to plug in any 5V USB device. Phone, tablet, GPS, or small lights all work.