According to the National Renewable Energy Laboratory's Spring 2025 Solar Industry Update, residential solar costs average around $2. Factors affecting cost per watt include:Prices for TOPCon cells will be based on an efficiency of 24. 0%+ efficiency due to production line optimization and efficiency improvement from October 23,2024. Global estimates are used before 2010; European market benchmarks thereafter due to limited data availability. Solar photovoltaic module prices refer to the cost of the solar panel itself, and do not include installation or other system. LCOE (Levelized Cost of Electricity) is a key metric used to compare the cost of generating electricity from different energy sources, including solar PV, wind, fossil fuels, and nuclear power. 56 per watt on average, with systems ranging from $20,000-$30,000 before incentives. Combined with the tax credit, homeowners can achieve payback periods of just 6-10 years. Significant Regional Variations: Solar costs vary. Notice: By accessing this site you agree that you will not copy or reproduce any part of its contents (including, but not limited to, single prices, graphs or news content) in any form or for any purpose whatsoever without the prior written consent of the publisher. Copyright © 2026 SMM Information. Through detailed survey cross-survey of data from major suppliers and procurement parties, Green Energy Research is able to provide an accurate weekly report on spot prices of key PV components.