Energy Storage Incentive Rate Setting for States
Until battery prices fall, energy markets mature, and currently non-monetizable energy storage services become monetizable, state incentives will be a necessary and critical key to increasing energy
The discount rate r is set at 0.08, as referenced in the China Energy Storage Network. The current corporate income tax rate in China τ is around 25%. The Bloomberg New Energy Finance suggests that the investment cost of battery energy storage in 2022 is $261 per kWh. Therefore, we calculate the initial investment cost (I) to be 3.36 million RMB.
To effectively guarantee its grid stability of renewable energy sources, the Chinese government is expected to keep implementing its policy incentives for energy storage in the near future. This particular dataset provides us with the technical specifications of an energy storage system and allows us to calculate the model parameters.
The economics of energy storage represents the decision of whether or not to invest in energy storage technologies. Unlike the feed-in-tariff (FIT), which is mainly determined by the supply and demand in the electricity market, the peak-valley spread is a reflection of the time differentials of electricity as a commodity.
The subsidy policy, however, can be activated or terminated at an uncertain time and therefore, the firms face additional policy uncertainty when making the decision. We derive the investment thresholds of the market spread that the firms use to make a decision on investing immediately or holding an option.
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