How to Choose The Energy Storage System for Your House?

With the outbreak of coronaviruses, the demand for solar energy and energy storage has increased for customers who are at home or working remotely. Bonnen battery’s technical experts introduced some basic knowledge of residential energy storage, so as to provide some help for installers and residential users.

Before installing the energy storage system, it is necessary to understand the needs of residential users and installation work before choose the optimal capacity of residential energy storage systems for residential users. The best way to choose its capacity is to decompose this process into two steps:
(1) Make a load analysis.
(2) Analyze the deployment of solar power generation facilities.

Make a load analysis

If the optimal residential energy storage system capacity cannot be well-chosen, energy storage users may pay more or fail to meet their user needs. To avoid this situation, the installer must first communicate with residential users and figure out what the basic load they need to supply power. For most residential users, they may initially want to power all the load equipment in their homes, until they understand that this may cost more, and usually choose to power the basic load (such as refrigerators, lamps, modems, routers, etc.). The standard residential energy storage system of 10-20kWh usually supplies power to its basic load for 12-24 hours.

Residential users need to replace energy-consuming devices with energy-saving or smart devices for this purpose. If you want to provide backup power for the air conditioning system, you need to ensure that the house has taken effective thermal insulation measures and adopted energy-saving air conditioning. Once the expectations of residential users are clear, the next step is to choose how much spare capacity they may need. If residential users are connected to the grid, you can get a relatively accurate number by looking at the previous electricity bill to match their energy consumption.

For off-grid energy storage solutions, you can use meters to help determine their power requirements and calculate load energy consumption more accurately. In general, it is better to set a higher energy storage capacity, otherwise, residential users will find it difficult to satisfy.

When determining the energy storage capacity and electricity cost of residential users, the following formula can be used as the calculation criterion:

(1) Ampere (A) × volt (V) = watt (W)
(2) Load power (W) × hours of use (H) = watt-hour (Wh)
(3) Daily load power consumption (kWh) × 30 (days) = monthly load power consumption (kWh / month)
(4) monthly load power consumption (kWh) × Electricity rate ($ / kWh) = monthly electricity bill

Analyze the deployment of solar power generation facilities

The residential solar energy + energy storage system can supply residential users with sustainable power when the power grid fails, which can save more electricity costs and reduce the residential carbon footprint. When residential users decide where to install residential solar power facilities, it is important to consider weather conditions and obstacles such as trees or buildings. After the installation location is determined, the installed capacity of the solar power generation facility must be matched with the inverter power of the energy storage system. The deployment of energy storage systems for solar power generation facilities can theoretically effectively provide continuous power and recover costs by saving electricity costs.

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