There are 2 main types of home energy storage systems: one is a low-voltage system, and the other is a high-voltage system.
Low-voltage battery management systems are usually DC 48V systems with a single pack capacity of 50Ah~200Ah, suitable for forming small and medium-sized battery systems through parallel connection. Due to the low voltage, the current is higher when the capacity is larger, which brings about an increase in safety and cost. To solve these issues, high-pressure home storage systems have emerged.
High-voltage home storage systems are currently typically composed of multiple battery packs connected in series, with the voltage of household systems ranging from 100V to 500V. Systems exceeding 500V are typically extended for small-scale industrial and commercial storage scenarios.
The general technical characteristics of high-pressure home storage systems are:
Architecture: Two-level architecture: control+acquisition
System composition: generally includes a high-voltage box, BCU control board, and BMU cell acquisition board
Function: Similar to low-voltage systems
Design: Relays are usually used as power switches
