System Overview - Nuvation Energy S801 Product Manual

3. System Overview

The Nuvation Energy Multi-Stack Controller aggregates all battery stacks within a multi-stack energy
storage system. It enables operation of the overall system as a single unified battery, while still
providing stack-level control.
This product functions as a central battery control hub for other control systems. These may include
power conversion systems and/or energy controllers. Through this hub, such control systems can
obtain and respond to battery data and send control commands to the battery system.
The Multi-Stack Controller can be used to manage up to 36 battery stacks in parallel, and will bring
up stacks in the sequence best suited to the immediate use-case requirement, i.e. power, energy, or
capacity.
The Multi-Stack Controller provides two crucial battery-level software interfaces for large, multi-stack
battery applications:
1. Modbus TCP:
•
Unified view of the entire battery conforming to open energy standards
•
Conforms to MESA (Draft 3) Models: S801, S802, and S803
•
Used directly by inverters and other grid infrastructure implementing the MESA (Draft 3)
standard
2. Web-based configuration and diagnostics:
•
Hosts web-based tools that can be accessed from common web browsers
•
Used to configure settings and view diagnostic information for the entire battery system
A few key system-level features that are also provided are:
▪
System-wide statistics for voltages, temperatures, and currents
▪
Current limiting algorithms for multi-stack battery systems
▪
State-of-Charge algorithms for multi-stack battery systems
▪
NTP client for BMS time synchronization
Document ID: NE-PM-004
Figure 1. Nuvation Energy Multi-Stack Controller
Nuvation Energy Multi-Stack Controller - Product Manual
4 Rev 2.0, 2022-05-18
Curie Update 3