Is there a battery backup system for dull days? Or is there a kit to connect to mains for those times? Can you vary the temp for cut in to below the 25degrees? eg 22? I was thinking 2 of these for a 100m2 warehouse with a 6 m high roof - does that sound right?
Solarking do not offer a battery backup at this stage or mains connection and the temp sensor is a fixed type, not adjustable. The fan will still operate at lower speeds even on dull days so this might just be enough to exhaust the shed to make it more comfortable. Two fans is definitely ample.
nice looking product. warranty?
Hi there. Yes they work very well. 2 year warranty on the fan and 10 year warranty on the solar panel output.