© 2021 by XOLTA
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2 XOLTA BATTERY ENERGY STORAGE SYSTEM OVERVIEW:
2.1 Introduction
The XOLTA outdoor BESS is a modular, cloud-connected multipurpose stationary energy storage system.
The BESS was designed for a wide range of ambient temperature conditions which makes it suitable for
outdoor installation without any additional enclosure. The system is designed for various operation modes
(applications) which will be further described in Chapter 4.
The main features of the XOLTA outdoor BESS are:
• PLUG AND PLAY: Simple installation and commissioning. The system requires grid connection, internet
and electric meter connections.
• ALL IN ONE: All components of the system are integrated into a single cabinet. This includes the battery
cells, the power conditioning system (PCS), the thermal management system (TMS), the battery management
system (BMS), the multi battery rack control system and the energy management system.
• OUTDOOR OPERATION CAPABILITY: The mechanical casing of the system was designed to be effective
up to enclosure rating IP55 (dust and water jet ingress).
• MODULARITY: The storage system power and energy can be expanded and tailored to specific needs. In total,
up to 32 XOLTA battery racks can be connected and operated in parallel providing up to 1MW and 2.5MWh.
• MULTIPURPOSE: The system is designed for various applications, from the integration of renewable energy
(e.g. increasing renewable self-consumption) up to various grid support applications (e.g. frequency and
voltage support).
• XOLTA CLOUD CONNECTION: The system is integrated with the XOLTA Cloud. It allows for system monitoring,
advanced control, data acquisition, and data storage.
• SAFETY: The system is designed to offer exceptionally high operational safety. For example, the system is
fitted with state-of-the-art battery systems, multi-layer and redundant protection systems, Lithium Balance’s
battery management system (BMS) which assure maximal system safety under various operating conditions.
• LOW TOTAL COST OF OWNERSHIP: This is achieved by very high system round-trip efficiency, low standby
losses, minimal operational and maintenance (O&M) cost and intelligent energy management.
• SITE CONTROLLER: This works as a multi battery rack control system and an energy management
system (EMS) which manages the entire XOLTA outdoor BESS. It provides charge/discharge power
management, monitoring to assure safe system operation, communication with all system peripherals
(e.g. the battery converter), data acquisition, communication with the XOLTA Cloud, system diagnostics
and error handling.
• THERMAL MANAGEMENT SYSTEM: Simple and efficient parallel cooling system.
• PERIPHERALS: Possibility of integrating external energy meters and other.
