The price of a 345 watt solar panel varies based on several factors, including brand, technology, and installation costs. On average, consumers can expect to pay between $200 to $450 for a single panel. High-quality models from well-known manufacturers often fall on the higher end of this spectrum, while budget options may be available at lower prices. When calculating the total cost, it’s also essential to consider associated expenses, such as inverters, mounting hardware, and installation, which can add an additional $1,000 to $3,000 to the overall expenditure for a complete system.