How to buy a home energy storage system

With the popularization of renewable energy and the growing demand for energy autonomy in households, home energy storage systems are gradually becoming an important part of modern home energy management. However, faced with a wide range of products on the market, consumers often find it difficult to judge their performance and applicability when purchasing.

As a professional energy storage battery manufacturer, GreenMore is well aware of the core concerns of users when choosing a home energy storage system. This article will sort out the key parameters that you must pay attention to when purchasing a home energy storage system from a professional perspective to help you make a more informed investment decision.

1. Battery capacity (kWh)

Definition: Battery capacity represents the maximum amount of electrical energy that a system can store, usually measured in kilowatt-hours (kWh).

Why is it important?

This is the core indicator that determines whether the energy storage system can meet the daily electricity demand of a household. For example, a family of three consumes about 10-15 kWh of electricity at night. If you want to achieve "photovoltaic night use" or "peak-valley electricity price arbitrage", you should choose an energy storage system of at least 10 kWh.

GreenMore recommends: Our home stackable energy storage system supports modular expansion, with an initial capacity starting from 5kWh and expandable to more than 20kWh, which can be flexibly adapted to different household electricity usage scenarios.

2. Output power (kW)

Definition: Output power refers to how many electrical appliances the battery system can provide power for simultaneously, measured in kilowatts (kW).

Why is it important?

High power means that the system can drive multiple high-power devices at the same time (such as air conditioners, water heaters, microwave ovens, etc.). If the power is insufficient, even the largest capacity may not be able to start the critical load.

GreenMore recommends: The single-unit output power of the home energy storage system we provide can reach 3kW~20kW, and the total power output can be increased by parallel connection to ensure worry-free emergency power supply for the home.

3. Cycle Life

Definition: Refers to the number of charge and discharge cycles that a battery can complete while maintaining a certain capacity attenuation standard (such as 80%).

Why is it important?

Cycle life directly affects the service life of the system and the return on investment. Generally speaking, the cycle life of high-quality lithium iron phosphate batteries can reach more than 6,000 times.

GreenMore Advantages: Our home energy storage system uses high-stability LiFePO₄ batteries with a designed cycle life of more than 6,000 times, ensuring stable operation of the system for more than 10 years.

4. Depth of Discharge (DoD)

Definition: DoD represents the fraction of energy that a battery can safely release without compromising its lifespan.

Why is it important?

Higher DoD means more usable energy. For example, a battery with a nominal capacity of 10kWh has an actual usable capacity of 8kWh if its DoD is 80%.

GreenMore performance: The DoD of our home energy storage system is as high as 90%, which is much higher than the industry average, ensuring that every watt-hour is used efficiently.

5. Round-trip Efficiency

Definition: The overall energy conversion efficiency of a battery during charging and discharging, usually expressed as a percentage.

Why is it important?

The higher the system efficiency, the smaller the energy loss, and the more economical and environmentally friendly it is. Generally speaking, the conversion efficiency of an efficient energy storage system should be above 90%.

GreenMore data: The overall efficiency of our home energy storage system can reach 92% to 95%, and combined with the intelligent management system, it can further reduce energy loss.

6. Installation method and space adaptability

Common types include:

1. Wall-mounted energy storage battery: saves floor space and is suitable for small homes.
2. Stacked energy storage battery: Modular design, easy to expand, suitable for medium and large households or future expansion needs.
3. Floor-standing/cabinet-type energy storage system: suitable for commercial environments and can also be used in villa-level residences.

GreenMore Solution: We offer a variety of installation forms of product lines, including wall-mounted, stacked and cabinet energy storage systems to meet the needs of various home structures and space layouts.

7. Compatibility and intelligent functions

Inverter compatibility

Ensure that the energy storage system is compatible with mainstream brand inverters (such as SMA, Growatt, GoodWe, etc.) to avoid additional equipment replacement costs.

Intelligent monitoring platform

It supports remote monitoring, data analysis, fault warning and other functions to improve ease of use and safety.

GreenMore Solution: Our home energy storage system supports multiple inverter integrations and is equipped with the GreenMore Energy Management App for 24/7 remote management and optimization control.

8. Safety certification and protection level

• CE
• UL
• IEC62933
• UN38.3

Recommended protection level: IP65 and above, ensuring dust and water resistance, suitable for a variety of indoor and outdoor installation environments.

GreenMore promises: All products have passed multiple international certifications, the casing is made of flame-retardant materials, and has an IP65 protection level to ensure long-term safe operation of the system.

In summary, when purchasing a home energy storage system, in addition to price factors, you should also focus on core parameters such as battery capacity, output power, cycle life, depth of discharge, system efficiency, installation method, compatibility and safety certification. These indicators not only determine the performance of the system, but also affect the user's long-term experience and return on investment.

GreenMore is committed to providing users with high-performance, high-reliability, and highly intelligent home energy storage solutions, including wall-mounted energy storage batteries, stacked energy storage batteries, and complete home energy storage systems, helping every family move towards a new era of green, intelligent, and self-sufficient energy.

For more detailed parameters and configuration solutions of GreenMore home energy storage products, please visit our official website www.gmsolarkit.com or contact a professional consultant (email: export@gmsolarkit.com) for customized services.