Always On, Even Off-Grid
Island mode means your site can run as its own power system when the grid goes down. With battery storage, smart control, and optional renewables, you keep critical loads powered and reconnect smoothly when the grid returns, all certified to EU standards and supported locally in Sweden.
How island mode works
Normal operation
Your site runs on the grid and the battery optimises cost and readiness.
Grid isolated
The Automatic Transfer Switch (ATS) disconnects the site safely when an outage is detected.
Battery start
The BESS energises the local system and stabilises voltage and frequency.
Independent power
Critical loads keep running as your site operates as a microgrid.
Seamless re-sync
The EMS matches grid conditions and reconnects without interruption.
Five simple steps from grid power to independent operation and back again.
Choose the setup that fits your needs
Every site is different. EnBrilion provides three proven island mode system alternatives — from compact single-unit hybrids to scalable multi-unit setups. Each solution is built on our TÜV-certified, fire-safe LFP technology with advanced cooling. We always supply the ESS backbone, and can also deliver and integrate PV and diesel generators if required.
Single-Unit Hybrid ESS
All-in-One Hybrid ESS — with optional PV and diesel
A compact solution that combines battery storage with grid connection, solar PV, and diesel backup in one unit. If PV or diesel is already installed on-site, the ESS integrates seamlessly. If not, EnBrilion can provide a full turnkey system including these components. Liquid-cooled for reliable operation in Nordic climates.
ESS is the backbone. PV and diesel can be integrated from your site or supplied by EnBrilion.
Multi-Unit Parallel Systems
Scalable Multi-Unit ESS — MW-level island mode
For larger facilities, multiple BESS connected via the EnBrilion Energy Gateway can operate in parallel, scaling seamlessly to megawatt-level microgrids that ensure continuous operation of critical infrastructure. Each unit integrates with PV and can connect with diesel backup through site infrastructure. Customers can use existing installations, or EnBrilion can deliver PV and diesel as part of a turnkey solution. Immersion cooling ensures the highest safety and uptime.
ESS is the backbone. PV and diesel can be integrated from your site or supplied by EnBrilion.
Standard C&I ESS
Reliable C&I ESS — flexible integration options
A robust immersion- or liquid-cooled ESS for sites that don’t require direct PV input. Designed for backup, peak shaving, and load shifting, with the option to connect diesel backup via site infrastructure. If needed, EnBrilion can also supply and integrate PV or diesel solutions for a complete system.
ESS is the backbone. PV and diesel are optional — integrate existing assets or let us deliver them.
Island Mode for Critical Infrastructure
EnBrilion island mode keeps hospitals, data centers, telecom networks, industry and logistics running even during power outages. As a resilient microgrid solution, it safeguards the critical infrastructure society depends on. Already trusted by Swedish municipalities and industry to secure power resilience.
Hospitals and care
Keep wards, labs and IT systems running.
Data centers and IT
Protect uptime and equipment through grid events.
Telecom and broadcast
Ensure base stations and networks stay online.
Industry and logistics
Avoid production stops and costly downtime.
Public safety hubs
Maintain operations at emergency services and shelters.
Remote and weak grid sites
Farms, islands or construction areas where stability is limited.
Why island mode with EnBrilion
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Continuity – seamless transfer without disruption or downtime
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Safety – LFP chemistry, immersion cooling, fire suppression and IP55 steel enclosures
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Lower emissions – fewer generator hours and more renewable integration
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Scalable and smart – start small, expand as loads grow and let the EMS manage priorities automatically
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Supports energy communities – built for Nordic energy-sharing models and maximises renewable integration.
Frequently Asked Questions
Battery Energy Storage Systems
Design Your Resilient Microgrid
Power outages don’t have to mean downtime. With EnBrilion you get safe, TÜV-certified energy storage and island mode control that keeps your site running when the grid does not.
Contact us today!
info@enbrilion.com
+46 70 283 99 22