Wattwise

Wattwise Oy installs battery storage systems and solar power plants for detached houses and businesses in Finland. Work covers panels, mounting, inverters, batteries and connections to the electrical panel, and also includes EV charging points and electrical maintenance and fault-finding. Supported equipment brands listed on the website include Solis, Solax, Growatt, Fronius, Dyness and ABB.

Its customers are sales companies that sell the systems to end customers. Wattwise signs a contracting agreement with each sales company and carries out the installation in its name. Prices are agreed in advance: a fixed installation fee per battery, a price by panel count for solar installations, a fixed price per kW for inverters, and a travel allowance of 0.35 € per km.

The company was founded in 2024 (registered 25 June 2024) and is based in Tampere. Installation teams depart from Tampere, Turku and Oulu. The website states that about 4,500 systems have been installed, including about 2,000 batteries and 2,500 solar power plants, with teams installing about 7 systems per day.

Product: Installation of home and commercial battery storage and solar PV systems, plus EV charging points and electrical maintenance, delivered under contracts with sales companies.