Hubei xinjie new energy technology Co,.ltd

solar factory in china

In cases of self-consumption of solar energy, the payback time is calculated based on how much electricity is not purchased from the grid.[91] However, in many cases, the patterns of generation and consumption do not coincide, and some or all of the energy is fed back into the grid. The electricity is sold, and at other times when energy is taken from the grid, electricity is bought. The relative costs and prices obtained affect the economics. In many markets, the price paid for sold PV electricity is significantly lower than the price of bought electricity, which incentivizes self consumption. Moreover, separate self consumption incentives have been used in e.g. Germany and Italy.Grid interaction regulation has also included limitations of grid feed-in in some regions in Germany with high amounts of installed PV capacity.By increasing self consumption, the grid feed-in can be limited without curtailment, which wastes electricity.

A good match between generation and consumption is key for high self-consumption. The match can be improved with batteries or controllable electricity consumption.However, batteries are expensive and profitability may require the provision of other services from them besides self consumption increase,[95] for example avoiding power outages.Hot water storage tanks with electric heating with heat pumps or resistance heaters can provide low-cost storage for self consumption of solar power. Shiftable loads, such as dishwashers, tumble dryers and washing machines, can provide controllable consumption with only a limited effect on the users, but their effect on self-consumption of solar power may be limited


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