42Watt

42Watt, founded in 2021 and based in Munich, works with German property owners on making residential buildings climate-neutral. The company describes itself as an independent full-service partner: it advises on whole-home energy renovation, plans and installs the resulting measures, handles subsidy applications and coordinates the tradespeople involved, through to post-installation maintenance. Its target for renovated buildings is an energy consumption of below 42 kWh per square metre per year, set against the wider goal of a climate-neutral building stock by 2045.

The company's technical scope covers energy efficiency consulting, building energy renovation and planning, heat pump technology, photovoltaics, battery storage systems and energy management systems. Rather than promoting individual products, its consulting approach recommends the combination of measures that is sensible and economical for a given building. As an independent advisor, it is not tied to particular product vendors.

The team consists of energy consultants, engineers and architects working across consulting, planning and project execution. Employees work on projects that span the full process, from the initial assessment through funding administration (Fördermittelbeantragung) and coordination of craftsmen to the finished installation.