How much money can you save using solar pannels for electricity?

I live in Hawaii and the cost of living is very high. I was wondering if I could save a bundle of money installing solar pannels for electricity instead of paying a monthly bill. I know it costs a lot of money to install solar pannels but in the long run inflation will just raise your bills like crazy. I heard in the mainland the cost of living is way cheaper and I am planning to move up there but will installing a solar pannel save me a lot of money if I live in the mainland?