In recent years, extreme weather events have become increasingly common worldwide. Snowstorms and wildfires have frequently occurred in countries like the United States and Australia, resulting in power outages lasting for more than 10 hours. South Africa experienced over 200 days of electricity restrictions in 2022, with power cuts lasting up to 1,900 hours. Geopolitical conflicts have also disrupted natural gas supplies in Europe, leading to a surge in electricity prices. As a result, people are increasingly recognizing the necessity of home energy storage.
Furthermore, factors such as the rapid advancement of the solar energy industry and the growing popularity of sustainable development concepts have stimulated the continuous demand for home energy storage. According to data released by EVTank, the global residential energy storage capacity reached 15.6 GWh in 2022, marking a year-on-year growth of 136.4%. EVTank predicts that by 2030, this figure will reach 172.7 GWh, with a cumulative installed capacity of 748.9 GWh for residential energy storage systems worldwide.
Installing a residential solar energy storage system has several benefits. On one hand, it can serve as a backup power source for households, improving self-sufficiency and reducing reliance on the electrical grid. On the other hand, excess electricity generated from solar panels can be sold back to the grid, helping to reduce household electricity expenses. Additionally, utilizing clean energy sources reduces the consumption of non-renewable energy in traditional power generation methods, mitigates greenhouse gas emissions, and contributes to building a more sustainable future.
Residential solar energy storage systems typically consist of three main components: solar photovoltaic (PV) panels, hybrid inverters, and energy storage batteries( Products like Hinen's Pro series - Pro 5, Pro 15, Pro 20t integrate the inverter and battery into a single unit). Here's a breakdown of the components and their functions:
· Solar PV Panels: These panels capture sunlight and convert it into direct current (DC) electricity.
· Hybrid Inverter: The inverter is responsible for converting the DC electricity produced by the solar panels into alternating current (AC) electricity. AC power is the standard form of electricity used in most household appliances and electrical systems.
· Energy Storage Batteries: The batteries in a home solar energy storage system serve as a container for storing excess electricity generated by the solar panels.
Using the Pro 15（15kW Residential Energy Storage System All-in-one Module) as an example, let's briefly explain the working principles of a residential solar energy storage system in three modes:
Mode 1: House loads & Charger
During the day, the solar energy collected by the pv panels is converted into electricity and directly supplied to the loads. Excess electricity can be prioritized and stored in the battery through the APP. When the battery is fully charged, the surplus electricity can be fed back to the grid, earning credits. During the night, the stored energy in the battery is used to power essential loads or electric vehicles. If the battery capacity is insufficient to support the load, additional power can be drawn from the grid.
Mode 2: Power Outage
In case of a grid outage or in off-grid areas, during the day, the energy collected by the solar panels is converted into electricity and directly supplied to the household loads. Any excess electricity is stored in the battery. During the night, the stored energy in the battery is used to power essential loads or electric vehicles. The Base 6i (6kW Off-grid Inverter) and Pro 15（15kW Residential Energy Storage System All-in-one Module) models can be directly connected to a diesel generator to provide additional power.
Mode 3: Peak & Off-peak
To help reduce household electricity expenses, the system can take advantage of the local peak/off-peak price difference. During low-priced periods in the daytime or late at night, the system can store grid electricity in the battery. When the electricity price is high, the stored energy can be used to power the loads.
Hinen offers a variety of energy storage solutions for single-phase, three-phase residential scenarios, and off-grid applications. Our aim is to enable households to achieve energy independence and together build a zero-carbon sustainable world.
