Off-grid solar systems can be cheaper than extending power lines in certain remote areas. Another big advantage of going off grid is that, 100% independence from electricity retailers. Need not to pay anything for electricity costs, and 100% insured against rising energy prices. System also protects from grid-tied power failures or blackouts. Living off the grid and being self-sufficient feels good. Energy self-sufficiency is also a form of security. Power failures on the utility grid do not affect off-grid solar systems.