crystalsolar
crystalsolar 5W 18V 270mA Polycrystalline Solar Panel Blue
A polycrystalline solar panel rated at 5 W, 18 V and 270 mA with a 17 % conversion rate for 12 V battery charging
- TypeSolar Panel
- ColorBlue
- 5 W panel delivers 270 mA at 18 V for 12 V battery charging
- Polycrystalline silicon with 17 % conversion rate keeps output steady in daylight
- Laminated glass-fibre construction weighs 200 g and measures 210 mm by 200 mm
- Includes power cable for direct connection to phones, batteries or outdoor lights
- New condition ensures full rated performance from first use
Polycrystalline Solar Panel for 12 V Battery
This 5 W polycrystalline panel delivers 18 V and 270 mA for trickle-charging 12 V lead-acid batteries. It suits automotive, marine and small off-grid setups where a lightweight 200 g module is preferred. The blue glass-fibre laminate withstands outdoor exposure while keeping the footprint compact.
18 V Working Voltage Matches 12 V Systems
The panel’s 18 V working voltage is the decisive figure; it provides enough headroom to push current into a 12 V battery through a charge controller without over-voltage risk. At 17 % conversion the 270 mA output is steady in full sun but drops sharply under cloud or shading. Buyers needing faster recharge rates or higher daily watt-hours will find the 5 W limit restrictive.
5 W Output Covers Maintenance Loads Only
At 5 W the panel comfortably maintains standby batteries, runs low-draw LED lighting or tops up a phone via a suitable regulator. It cannot support continuous loads such as fridges, pumps or multiple devices simultaneously. For anything beyond trickle maintenance a larger array or higher-wattage module is required.
Highlights
- 5 W panel delivers 270 mA at 18 V for 12 V battery charging
- Polycrystalline silicon with 17 % conversion rate keeps output steady in daylight
- Laminated glass-fibre construction weighs 200 g and measures 210 mm by 200 mm
- Includes power cable for direct connection to phones, batteries or outdoor lights
- New condition ensures full rated performance from first use
Specifications
| Type | Solar Panel |
|---|---|
| Color | Blue |
Questions about this item
What does the 5 W rating mean when the panel is connected to a 12 V battery?
The panel delivers up to 5 W at its 18 V working voltage, producing about 0.27 A; a charge controller steps the voltage down to 12 V for safe battery charging.
How does the 18 V working voltage affect charging a 12 V system?
The 18 V output is higher than a 12 V battery requires, so a charge controller is needed to regulate the voltage and prevent overcharging.
What mounting space does the 210 mm by 200 mm panel need?
The panel measures 210 mm by 200 mm and is 5 mm thick, so it fits on any flat surface with at least that footprint.
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