How Do I Choose an Energy Storage System?

What does the integrated energy storage system do?

An integrated energy storage system is a system that converts DC power from solar panels and AC power from the grid into usable AC power.

A battery can be used to store electrical energy and provide power at night when solar power is not available or when the public power supply is turned off.

If the energy storage system mainly uses lithium batteries, a BMS (battery management system) is also required to control the battery pack.

What are the main factors to consider when choosing an integrated energy storage system?

When building an integrated energy storage system, it is important to consider maximum output power, efficiency and any special features:

1. Battery backup or load transfer

2. Calculate the power of the solar panel and the charging current of the solar charge controller, both of which can determine the charging time.

3. For the usage time, the inverter power and battery capacity need to be calculated.

How to design an energy storage system?

How to build a commercial energy storage system, the most important thing is to find a professional solar panel factory, inverter factory, solar charging factory and battery energy storage system manufacturer, and Carspa can provide a one-stop solution.

For example: 5kVA solar integrated energy storage system

5KVA means that the output power of the core component inverter is 5kav. The output power of different manufacturers may be different. Some companies have an efficiency of 80%, while others have an efficiency of 100%.

So basically a 5kva solar storage system can convert up to 4000w-5000 watts of DC power into AC power.

5KVA inverter application range:

5KVA inverters are typically used in larger residential or commercial applications where they can power a wide range of appliances and equipment.

1. Special functions

When choosing a 5kVA inverter, it is important to consider any special features such as input voltage and waveform, efficiency, and battery backup or remote monitoring.

2. Usage time

After determining the inverter, you need to consider the usage time.

If 5KVA (5000w) is used for one hour, the current used is 416A

(1) Lead-acid battery efficiency is 70%

So one hour requires 416/0.7= 597AH

It requires 2 12v*300AH lead-acid batteries for one hour. If it is to be used for 8 hours, 16 12v, 300Ah lead-acid batteries are required.

(2) Lithium battery efficiency is 85%

One hour requires 416/0.85=489AH, which requires 2 12v 250Ah lithium batteries.

If you want to use it for 4 hours, you need 8 12v 250Ah lithium batteries. Lithium battery packs also require BMS to control the battery pack.

Then you need to choose a solar charge controller and solar panel, which will determine the charging time.