The cost to install solar panels and a battery depends on system size, panel efficiency, and battery storage capacity. On average, homeowners can expect to pay between $20,000 and $35,000 for a combined solar and battery system. Batteries, such as the Tesla Powerwall, can cost between $7,000 and $10,000 each. While the initial expense is higher, solar batteries ensure energy independe... https://solarsme.com/solar-panel-cost/