A typical 6 kW home solar system in Ohio costs about $16,560 before incentives, or roughly $11,592 after the 30% federal tax credit.
Local pricing and sun hours change the math. Size your system and estimate cost in the solar cost calculator and system size calculator.
The 30% federal credit applies everywhere (see the tax credit calculator); Ohio may add state or utility incentives. Check payback against your electric rates in the savings calculator.