In conclusion, the cost of solar inverters can range from $300 to $2,500 or more, depending on factors such as capacity, technology, brand, location, and installation. Several factors significantly impact the costs associated with solar power inverters. Wondering about inverter communication box installation prices for your solar project? This guide breaks down key cost factors, regional pricing trends, and smart strategies to optimize your budget. Why. String inverters are the most affordable. Countries like the USA, Germany, and India have introduced financial assistance programs that reduce the overall cost of solar power systems, making solar inverters more affordable for homeowners and businesses. Think of it like this: a small apartment needs a smaller AC unit than a large house. The same principle applies here.