CROSTORION ESS 261
Lower peaks, cheaper nights and a site that keeps running — one liquid-cooled cabinet that pays attention to your bill, so nobody on your team has to.
The bill has a peak. The battery covers it.
Billing peak power, off-peak/peak arbitrage and PV self-consumption — a cabinet on site turns a spiky load into a flat one the grid connection can carry.
A grid upgrade takes eighteen months and is paid up front. A battery reaches the same result without raising the connection capacity — and with grid-connected and off-grid modes with automatic switching, it carries the site through an interruption.
- Peak power — shave the billed peak that sets your capacity charge.
- Arbitrage — charge off-peak, discharge at the daily peak.
- PV surplus — store midday solar instead of exporting it cheaply.
- Backup — off-grid mode with automatic switching keeps the site running.
Doors open, modules in
Our own photographs, not a rendering. The doors are open because the inside is the part worth showing: the modules, the busbars and the liquid-cooling loop that holds every cell within a few degrees of its neighbours.
That fleet is where the software comes from — and how many cabinets a site needs is not a rule of thumb. A large hotel can need more than a factory, so we run your own 15-minute load through the same AI sizing engine that produces a leasing offer.
What is actually in the cabinet
Five liquid-cooled packs, the high-voltage control between them and the grid, and fire suppression inside every pack. Product drawings from the ESS 261 brochure — the photographs elsewhere on this page are our own.
The pack
One of five. 314 Ah LiFePO₄ cells, liquid-cooled, 832 V DC across the string.
The high-voltage box
Isolation, measurement, and the interface the BMS talks through.
Fire suppression
At pack level, not only cabinet level — detection tubing runs inside each pack.
If you would rather not invest, we will
Under ESaaS the battery is our investment, not yours: we finance, install, own and operate the cabinet on your site. You put up no capital, and the net benefit the system produces is measured against your own meter and shared.
One agreement covers everything: the hardware, the Storion platform, service with the 24-hour response window, and the market work our electricity-trading licence allows. We are paid only out of what the system produces — our interests are yours.
Six cabinets on one busbar — the same product, repeated
Storage that grows with your business
Start with one cabinet and add units as the load grows. They parallel on a single 400 V AC busbar and there is no fixed ceiling — four units already give 500 kW and more than 1 MWh, and a site that needs more simply gets more; what sets the number is the sizing calculation and your grid connection, not the product. Photovoltaics, generators and EV chargers join the same bus, monitored from one platform. Nothing gets replaced; the system simply grows.
For larger sites, the same architecture steps up to containerised systems. See utility-scale
You run your business. We run the battery.
Our operations team monitors every system remotely, our engineers service it, and the client portal shows what it saved — and when it worked for the market. A contractual 24-hour support window applies for warranty cases in Croatia, Slovenia, Hungary, Germany and Spain.
Built for facilities with a real peak
Four kinds of site, four daily load curves — the amber part is the peak the battery covers.
Cooling, kitchens and guest EV charging — the peak lands after sunset.
Round-the-clock refrigeration with sharp compressor spikes.
Docks and fleet charging load the site overnight — PV covers the day.
Business parks peak with the working day — and report the ESG numbers.
Typical daily load profiles · dashed line = grid connection limit · amber = peak the battery covers
CROSTORION ESS 261 — specifications
Official product name: Storion Smart 261 kWh Intelligent Liquid-Cooled Industrial and Commercial Energy Storage System.
Full electrical specifications in the datasheet on request.
Take the datasheet with you
The full product brochure — dimensions, electrical data, safety architecture and installation notes — as a PDF.
Start your own project
Tell us about your project and we'll size a system and reply within two business days.