Economic evaluation of photovoltaic energy storage stations

Why is the integrated photovoltaic-energy storage-charging station underdeveloped?

The coupled photovoltaic-energy storage-charging station (PV-ES-CS) is an important approach of promoting the transition from fossil energy consumption to low-carbon energy use. However, the integrated charging station is underdeveloped. One of the key reasons for this is that there lacks the evaluation of its economic and environmental benefits.

Does distributed PV capacity affect the NPV of the PV-es-CS model?

Matlab 2020a is used to simulate the operation of the PV-ES-CS. The influence of distributed PV capacity and ES capacity on the NPV of the PV-ES-CS model is also investigated when the number of charging piles is constant ( Fig. A1 ).

What are the economic and environmental benefits of integrated charging stations?

The economic and environmental benefits of the integrated charging station also markedly differ on different scales: with scale expansion, the rate of return on investment and the carbon dioxide emissions reduction first increase and then decrease.

How long does a distributed PV module last?

Other parameters selection According to the “ Specifications for the Efficiency of Photovoltaic Power Generation Systems ” issued by the National Energy Administration (NB/T 10394–2020) , the lifespan of a distributed PV module is usually 25 years.

How much money does Shan et al invest in a power station?

Shan et al. invested about 1.8 million yuan to transform a service area into an integrated power station; in their design plan, the charging equipment is charged 10 times daily at 20 kWh per charge. Given that the profit is 0.8 yuan/kWh and about 58,400 yuan/year, it is expected to pay back in 4.5 years. Table 1.

How does a decline in energy storage costs affect investments?

A decline in energy storage costs increases the benefits of all-scale investments, an increase in electric vehicles promotes the benefits of small-scale investments, expansion of the peak-to-valley price distance increases the benefits of large-scale investments.