EnerCollege

South Africa has been plagued by power shortage for years. The main power source is coal power, short supply of the coal resource leads to high electricity price. Due to the long-distance transmission, approximately 10-12% of the power is lost during the process.Some people living in poor power condition would have to turn to diesel generators. However its high cost and harmful emissions makes it the last choice in the long run. Solar power, being environmentally-friendly and not affected by transmission power loss , has been popularizing by the South African government, and many households and businesses have put solar panels on their rooftop. Meanwhile as a trend for solar industry, energy storage system has also attracted more eyes of local customers.

In recent years with the popularization of new energy, the scale of grid-tie system has increased significantly. However, due to the primitive power grid construction in a lot of areas, decreased or canceled Feed-in-Tariff, and low PV self-consumption rate, the phenomenon of feed-in power limitation and solar station abandonment has frequently occurred, resulting in resource waste, investment return reduction or even deficit. In view of this situation, our company put forward the energy storage AC-couple retrofit scheme and has been widely applied. Grid connected energy storage system can store the surplus power and improve the self-consumption ratio. It is applicable to the scenarios that PV power cannot be sold to utility grid, and self-use electricity price is higher than the feed-in price, or solar power generation and consumption are not in the same period.

As we all know, energy storage battery plays an important role in an ESS system. Its main function is to store the energy generated by PV system, and supply load in the case of insufficient sun irradiation, grid cut-off or some other emergencies. Therefore, the battery is an indispensable part in a solar storage system. The commonly used storage batteries are lead-acid batteries, alkaline batteries, lithium batteries, ultracapacitor etc. At present, lithium batteries occupy the largest market share, among which the most common type is lithium iron phosphate(LFP) batteries. This paper emphasizes on the LFP battery and its application in energy storage system.

Electric vehicle with no doubt has become a trend in today’s global automobile industry and an integral part of people's green lifestyle. Therefore speeding up the construction of charging infrastructure has also become an urgent demand. The charging infrastructure as an important supporting facility, is of the most significance, as its quantity and distribution directly decide the charging convenience.