Profitability analysis of batteries for solar parks
A flexible small producer of renewable energy
- The output of the solar park is first stored in the battery
- In winter, the battery is charged from the network at a cheaper time
- Energy from the battery is supplied to the network at the most expensive time
- Battery payback period 8-9 years
Large consumer of independent renewable energy
- A solar park with more power than its consumption
- The surplus is stored in the battery
- The surplus is consumed in the evening and at night
- The payback period of the complete solution (solar + battery) is 5-6 years
Profitability of renewable energy frequency reserves
- The battery is charged from the network during cheap hours
- Battery capacity is sold on the Elering balance energy market
- The price of balance energy is always higher than the stock market price
- Activated according to successful bids
- Payback period of the batteries is 7-8 years
