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How to calculate the income from the sale of surplus electricity to the grid?
The calculation of the income from the sale of surplus electricity to the grid involves several key factors, including photovoltaic power generation, electricity prices, subsidies, etc. Here's how it works:
Electricity sales revenue
This is the most direct and stable source of income for photovoltaic projects. The calculation formula is as follows: electricity sales revenue = the electricity price of the project site x the actual power generation of the power station. For the project of self-use and surplus electricity online, it is also necessary to calculate the self-consumption and on-grid electricity respectively, and multiply by the corresponding electricity price.
State subsidies
In order to encourage the development of photovoltaic power generation, governments have introduced corresponding subsidy policies. The subsidy is usually linked to the installed capacity and power generation of the project, and the specific amount varies by region and policy.
Local subsidies
In addition to national subsidies, some local governments will also provide additional subsidies, which need to understand the specific subsidies according to local policies, and include it in the income calculation.
Proportion of spontaneous self-use
The total income of household distributed photovoltaic can be calculated by the following formula: Total income = proportion of spontaneous self-use × local electricity price + state subsidies for distributed photovoltaic power generation + local subsidies + proportion of Internet access × desulfurized coal purchase price × total power generation.
Surplus electricity on-grid
The formula for calculating surplus electricity sales revenue is: surplus electricity on-grid sales revenue = surplus electricity on-grid electricity × local benchmark coal price.
Electricity cost saved by self-consumption
The calculation formula of electricity cost saved by self-consumption is: electricity cost saved = electricity cost without photovoltaic power station - electricity cost of photovoltaic power station.
The state subsidy of full power
The formula for calculating the state subsidy of full power of photovoltaic power station is: State subsidy = full power of photovoltaic power station × national subsidy standard.
Considering the above factors, the income from selling surplus electricity to the power grid can be calculated by the following formula: Total income = (self-generated electricity × local electricity price + state subsidy + local subsidy) + (on-grid electricity of surplus electricity × desulphurized coal purchase price). This formula takes into account the electricity cost saved by self-use, state subsidies, local subsidies and the income from selling surplus electricity to the Internet, and can calculate the income from selling surplus electricity to the grid in a more comprehensive way.
Home energy storage product series
A lithium battery pack for home energy storage systems, which is compatible with solar panels and the sun The inverter can work together with the power grid to power household appliances, and it can also be used as a For off grid systems.
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