Eco x Ene no Soudan Madoguchi is a Japanese comparison and referral service for residential solar power systems and home battery storage. It connects customers with vetted installation companies suited to their circumstances and preferences, helping them compare multiple quotes through a free online process that the site says can take as little as 60 seconds. The service describes its recommendations as neutral and says customers will not face persistent sales calls. It reports more than 30,000 users and 346 registered sellers as of August 2026, and notes that solar power advisors are available.

Customers can request estimates for solar panels, batteries alone, or combined systems, including storage for households already using solar power. The site also provides information on typical installation costs, equipment manufacturers, local subsidies, and potential electricity-bill savings. Its featured brands include Sharp, Choshu Industry, Canadian Solar, Nichicon, and Kyocera. By comparing installer proposals and highlighting available incentives, Eco x Ene no Soudan Madoguchi helps homeowners explore options for self-consumption, lower energy costs, and backup power during outages.