Large consumer of independent renewable energy

Solar park combined with batteries

An independent large consumer maximizes the consumption of self-produced renewable energy in order to be more independent from energy market prices. The solution is a solar park combined with batteries of suitable capacity.

It is also possible to build this solution without having network-directed transmission capacity.

A suitable solar park capacity is three times the average daily hourly consumption. For example, if the average consumption of one hour per day is 33kWh, then the suitable size of the solar park would be 100kW.

During the summer, the surplus of solar energy production is stored in batteries and consumed in the evening and at night, when the sun no longer covers the total consumption. During the winter, energy is stored in the batteries during the cheapest hours and consumed during the most expensive hours. It also helps to reduce winter electricity bills by up to 30%.

The availability of the production capacity of the connection point allows participation in the frequency reserve market during the winter, which further increases the profitability of the batteries. NB! If there is no grid-directed generation capacity, then the inverters of the solar park must be configured in such a way that excludes grid-directed generation.

Payback time for solar park batteries

In the following example, the total annual consumption is 290 MWh. A solar park with a capacity of 100 kW produces an estimated 105 MWh of energy per year, which covers 36% of consumption, of which:

• 73 MWh of it is consumed immediately
  32 MWh of this is consumed through battery storage

In winter, savings are added from charging at cheap times and consumption at expensive times. Taking the average electricity price of 23 cents/kWh in 2022 as the basis of the calculations, we get approximately 5-6 years for the payback period of the complete solution.

Customer-based analysis

Each large customer generally has a different energy consumption profile, and therefore we carry out a solar energy production simulation and complete solution cost-effectiveness analysis for each large customer that takes into account their profile.