Installing a windmill would be cheap in long run than a solar powered backup. Companies like Orb energy install windmills for homes.
Alternate source of energy is something i always looked forward to, considering that the cost of electricity is ever rising in Bangalore & power cuts are so very frequent but the initial cost of deployment of such Solar/Wind systems were too high if we are looking at capacities of continuous 800 to 1000VA or higher when i last checked and i hear that they are not one time investment either, requires annual maintenance plans etc 🙁
But all this was 8years ago when we built our house, lets check how the market is now, wrote an email to Orb Energy.
If someone on this forum is already using Wind/Solar Power Backup Systems(only greater than 500VA) please give us more information on the Cost Involved: both initial & after sales annual maintenance, Space required for deployment and the Reliability/Service Experience of the Product/Vendor or Company