Arruda's Site - All rights reserved.
Here's the solar panel. It's a 25W 12V.
25w, 61.5 x 35 x 2, 2500g
Maximum power voltage: 18V
Maximum power current: 1.39A
Open circuit voltage: 21.6V
Short circuit current: 1.53A
Power allowance range: +/-3.0%
High efficiency solar panel
Power output warranty: 5 year-95% 10 year-90% 25 year-80%
Strong anodized aluminium frame
Works in low light, cloudy conditions and in-doors (facing the sun)
High transmittance low iron tempered glass with enhanced stiffness and impact resistance
£37.95 on eBay