Many people aspire to being completely off the grid. Simply, this means installing a big bank of batteries, and enough solar panels to manufacture all the electricity you need and then cutting your tie to the grid.
For normal sized homes the costs (fully installed) typically start from:
Small house $20-30,000
Medium house $40-50,000
Large house $60-70,000
A generator is also required. This can be integrated into the system with auto-start functionality so that it seamlessly provides power if there has been too much cloud or to boost the power that is available from the batteries for running large loads. You should allow from $6-14,000 for a quality auto-start generator.
The service provided by Martin from McNae Electrical Solutions was excellent and we are very satisfied with our solar power system.
John & Jan Brooks, Pohangina