Must all distributed solar PV storage be grid-connected?
What is distributed photovoltaic energy storage?
A distributed PV energy storage system is a flexible energy solution consisting of PV modules, energy storage batteries, inverters and monitoring systems. Solar panels convert solar energy into DC power, which is then converted into AC power by an inverter and provides renewable energy to a home or business when needed. At the same time, energy storage batteries can store excess electricity to supply power when needed. The system can obtain a certain amount of energy by installing solar panels on a building or infrastructure and storing it in storage batteries for use whenever needed.
What is grid-tied?
Grid-tied is a way of connecting different power plants that are scattered together through the grid so that they form a whole. When solar panels produce solar energy, it is injected directly into the grid if it is not used. This reduces the burden on the grid and provides renewable energy for other electricity-using devices. In this case, distributed PV storage grid-connected systems are considered to be an efficient clean energy solution.
Is distributed PV storage always grid-connected?
While distributed PV storage is often considered a grid-connected solution, it does not necessarily have to be connected to the grid. In fact, in some specific cases, distributed PV storage can also be isolated, i.e., exist completely off the grid.
For example, in high heating demand and harsh climatic conditions, such as polar regions, deserts and high altitudes, buildings often require an independent power supply due to difficulties in supplying electricity. In such cases, solar panels can be installed around the building or structures and powered independently by storage batteries.
Another example is in wilderness camping or military operations. Distributed photovoltaic energy storage systems can provide temporary clean energy for tents and battlefields without the grid, allowing the mission to continue.
In addition, in certain areas, where the grid is not well developed or the electrical infrastructure is still not built, energy storage systems may also be the only electricity supply, for example in rural Africa.
Although distributed PV storage is usually a grid-connected application connected to the grid, as has been seen, in some cases it can also be an islanded power supply system. Therefore, many factors need to be taken into account when selecting a distributed PV storage solution, such as application scenarios, climatic conditions, power infrastructure, etc., in order to identify a cost-effective, efficient and sustainable solution. With the continuous development of solar technology and the expansion of the international clean energy market, it is believed that distributed PV energy storage will have a broader application prospect in the future.
