With the implementation of energy storage policies and energy storage incentives in various places in China, photovoltaic practitioners have gradually begun to talk about solar storage + systems from photovoltaic + systems. This article introduces several common optical storage + systems.

1. Photovoltaic storage + charging pile

With the application of photovoltaic energy storage systems and the popularity of electric vehicles, the combination of the two has attracted widespread attention.

① Household optical storage + charging pile

Working logic: Photovoltaics are given priority to use by household loads. If there is any surplus, the car will be charged when it is connected to an electric car, and the energy storage battery will be charged when it is not connected to a car. After it is fully charged, it can sell electricity to the grid. If it is not allowed to sell electricity, it can also be set on the mobile app not to sell electricity. At night, the energy storage battery is discharged to the household load. During a power outage, photovoltaics and batteries only supply off-grid loads.

② Photovoltaic carport

The public photovoltaic energy storage carport not only satisfies the attributes of the carport for shelter from wind and rain, but also improves the self-use rate of photovoltaics. When there is no car charging, the photovoltaic power generation is stored in the battery, and the battery is discharged to charge the electric car when necessary.

2. Photovoltaic storage + BIPV

The combination of solar storage system and BIPV can not only maintain the beauty and safety of the building, but also deeply integrate green power.

The roof area of the project is 108㎡, and a total of 41 Sunshine tile products are installed on the north and south slopes. The photovoltaic utilization area is 3.7kW photovoltaic system; GoodWe Sunrise series photoelectric building materials + GW5048-ESA single-phase energy storage integrated machine + smart energy management platform ——The project adopts GoodWe’s overall power solution, and the system is self-contained and integrated into the original power distribution system.

3. Photovoltaic storage + community photovoltaic

Community PV is currently widely used overseas. The following case is GoodWe’s community solar storage project in Alabama, USA.

The project involved 62 households, installing a total of 800kWp of photovoltaics and 1.5MWh of batteries. Each family’s solar storage system is given priority to meet its own use, and the surplus power is shared (sold), and the insufficient part is powered through the DC bus. The system is uniformly dispatched by the EMS system.

4. Photovoltaic storage + whole county promotion

The county-wide promotion that is in full swing is not just a model of photovoltaic power sales. More and more provinces require the addition of energy storage to the county-wide promotion. For example, in bus terminals, schools, government agencies and other scenes with many roofs and high power consumption.

The following case shows the solar storage solution designed for the bus terminal. The system includes photovoltaic modules, grid-connected inverters, AC-coupled inverters, batteries, EMS systems, etc., which can effectively reduce grid power consumption, sharpen loads, and ensure power safety.

The working logic is to supply the photovoltaic system for charging the bus during the day and power for the office, charging the remaining part of the battery, and supplementing the insufficient part by the grid. It can support fast charging of electric buses. At night, the battery charges the bus (slow charge), and the insufficient part of the grid is supplemented. EMS uniformly monitors the status of charging piles, photovoltaic storage systems, and power grids, and uniformly deploys electricity in combination with bus travel schedules. Under special circumstances, the ATS switches to off-grid power supply to ensure the normal power supply of the site control system and safety facilities.

In addition to the above optical storage + system, there are also application scenarios such as optical storage + microgrid, optical storage + DC building, and optical storage + sunshine room. Photovoltaic storage + system may become a new growth point of domestic photovoltaic, let us wait and see.