Battery storage as a PPA component for solar parks

25.07.2025

Source: E & M powernews

The Swiss renewable project company Enerfin finances battery storage systems for solar parks in combination with long-term power purchase agreements.

Power purchase agreements (PPA) with electricity storage systems co-located with solar parks: Swiss project developer Enerfin combines the financing, installation and operation of PV storage systems with long-term power purchase agreements. The PPA term is set at 20 years.

According to the company, which is based in Tuggen on Lake Zurich, storage operation is Redispatch 2.0-compliant. Short-term interventions by the distribution grid operator are billed correctly in accordance with regulations. AI-based software is designed to optimize the marketing of electricity in spot trading.

Enerfin's offering is aimed at operators of solar parks with an output of between 1 and 120 MW. The storage systems are available from a capacity of around 400 kWh. They can be interconnected on a modular basis and the individual modules weigh less than four tons, according to the Swiss company.

No financing risk

The combination of financing, hardware, software as well as operation, trading and administration from a single source eliminates IT costs, interface problems and other risks for solar park operators, the Swiss advertise their package solution. "For operators of solar power plants, the acquisition of a battery storage system usually means additional planning, capital requirements, construction activities and coordination with the marketer. To avoid this, we have designed the new battery PPA package to be particularly simple and yet profitable," says Enerfin CEO Paul Hauser.

The company is still young. It was launched in the fall of 2024 by the Swiss company Lynus AG. At the time, the parent company contributed its tenant electricity contracting business to the new company. Enerfin reportedly started with a project portfolio of 300 residential properties and a total of around 2,400 apartments. In addition to tenant electricity contracting and storage solutions, the service portfolio now includes "flexible marketing" and "services for local authorities".

Author: Manfred Fischer