42Watt

42Watt is an independent partner for homeowners seeking to renovate Germany's building stock toward climate neutrality. Founded in 2021 and headquartered in Munich, the company accompanies clients from initial consulting through to finished installation, covering planning, subsidy applications, coordination of tradespeople and subsequent maintenance. Its stated aim is to make energy renovation straightforward rather than complicated.

The company's technical work spans energy consulting, building energy efficiency, heat pumps, photovoltaics, battery storage, energy management and funding administration. Rather than off-the-shelf single solutions, it recommends combinations of measures tailored to what is sensible and economical for each specific building. Renovated properties are targeted at an energy consumption of under 42 kWh per square metre per year, in line with the wider goal of a climate-neutral building stock by 2045.

Operations cover residential buildings and building renovation across Germany, drawing on a cross-disciplinary team of energy consultants, engineers and architects. The work sits at the intersection of clean energy, construction trades and project coordination.