Battery energy storage systems

Battery energy storage systems combine batteries, power conversion and a control system to store, shift and export energy. Check the monitoring and control interfaces, the warranty terms on cycling and who controls the battery while a flexibility service is active.

Companies in this directory

Compare the 14 companies

What each company offers, where it is based, when it was founded and, where our Device Directory covers its equipment, the protocol that connects it to EpiSensor Edge. Open a profile for its products, technology, markets and sources.

CompanyWhat it offersHeadquartersFoundedEquipment connects to EpiSensor Edge over
AlphaESS Residential and commercial battery storage systems Nantong, Jiangsu, China 2012 -
BYD Energy Storage Residential, commercial and utility battery energy-storage systems Shenzhen, China (BYD corporate headquarters) 2008 the inverter that manages it
CATL Battery cells and stationary energy-storage systems Ningde, China 2011 -
Fluence Utility battery storage, operating services and energy software Arlington, Virginia, United States 2018 -
FranklinWH Home battery storage and solar backup control systems San Francisco Bay Area, California, United States 2019 -
GoodWe PV and hybrid inverters, site meters and residential batteries Suzhou, China 2010 Modbus
Huawei FusionSolar Solar inverters, battery systems and plant management Shenzhen, China 1987 the inverter that manages it
Nuvation Energy Battery management systems and engineering for stationary energy storage Sunnyvale, California, United States 2017 Modbus
Pixii Modular battery storage built from swappable 3.3 kW power converters Kristiansand, Norway 2018 Modbus
Polarium Lithium-ion backup batteries for telecom sites and distributed storage Stockholm, Sweden 2015 -
Pylontech LFP battery modules and storage systems for homes, businesses and utilities Shanghai, China 2009 -
SolarEdge Optimised solar inverters, site metering and DC-coupled storage Herzliya, Israel 2006 a ZEM-65 electricity monitor or Modbus
TESVOLT Commercial and industrial battery storage with energy management Lutherstadt Wittenberg, Germany 2014 -
Zenobē Owner and operator of grid-scale batteries and electric fleet infrastructure London, United Kingdom 2016 -

What to look for

What good looks like

  • Evidence on controls, monitoring, degradation, safety and optimisation
  • Deployments across several use cases and markets
  • A clear integration route to EMS, PCS, SCADA or market systems

Red flags

  • Project size is claimed without operating detail.
  • Safety, controls and integration are thinly documented.
  • Hardware, software and services are sold as one story with no detail on each.

Monitoring and controlling battery storage

Start with the site's energy flows

A battery installation may include grid import and export, solar generation, battery charging and discharging, and building loads. Draw those measurement points before selecting hardware. Otherwise it is easy to count the same energy twice or mistake a site total for the battery's own output.

Use the electricity monitoring range where independent electrical measurements are needed. Select the configuration and current transformers against the current datasheet and the installation requirements, and confirm billing or settlement approval with the party that grants it.

Combine metering with battery telemetry

An external electricity meter measures electrical flow. Battery state of charge, internal temperatures, alarms and operating limits come from a supported interface to the battery system or its controller.

Edge can bring supported equipment readings into the same workspace as EpiSensor measurements. For the specific battery model and firmware, agree the interface, register or API mapping, units, update intervals and permissions. Check each telemetry point and command against the battery documentation, since two products that share a protocol can expose different points.

The Gateway runs Edge on site. Choose its communications options and any additional interfaces from the equipment and network on that site.

Make the charts useful

Compare battery power and state of charge with solar output and site import/export in the Edge Data workspace. Agree which power sign means charging and which means discharging. Check timestamps and measurement boundaries before calculating throughput or comparing energy totals.

For an efficiency comparison, define the measurement period and include the relevant auxiliary consumption and change in stored energy. Label calculated values so operators know how they differ from readings supplied by the battery.

Define control responsibilities

Edge supports configured local automation and partner integrations. Review demand response where its monitoring and control functions fit the project. The battery system keeps responsibility for its own protection and management; site-level commands sit on top of them.

Agree allowed operating modes, limits, command acknowledgement, local overrides and loss-of-connection behaviour. Verify the physical response as well as the API acknowledgement.

Connect a wider service when needed

A third-party platform is optional for using Edge's local tools. If the project needs portfolio optimisation or market participation, define that service with the provider and qualify the complete integration.

Browse battery manufacturers in the directory for context and read the VPP guide. Confirm the integration for the particular battery model before ordering.

Planning a battery storage installation? Tell us about the site, existing equipment and the data or control workflow you want to build.

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