Posted: 23/06/2016 at 18:53
Heaters take too much power to be run by solar panels sanjy. For example, you would need at least a 250W heater to be of any use in winter in a greenhouse and because the light levels are much lower in winter you would need 500W worth of solar panels which would cover a huge area and be expensive (roughly £750.) You would also need a large and expensive battery to store the power as well as a charge controller (more expense.)
Lighting is simple and successful though because it uses so much less power. A few watts worth of LED lights is very bright. Just search Amazon for 'solar shed light' and you'll find more than you can throw a stick at! These are simple to fit - just put the panel somewhere that isn't shaded and connect to the light which will contain it's own battery and charge controller. All you'll need to do is route the wire from the panel to the light and plug it in. "Plug 'n' play" as they say.