ARCTIUM ENERGY COMPANY The Arctium FLEX Cabinet Series
Single-cabinet, liquid-cooled outdoor ESS, 261–418 kWh. Each model below scales the same footprint up in power density — pick the cabinet that matches your service voltage and demand profile.
Arctium FLEX-261
The entry point of the FLEX cabinet line — a compact, single-cabinet liquid-cooled system sized for small commercial sites where footprint is the constraint.
| Rated Energy | 261.2 kWh |
| Rated Power | 75 kW (82.5 kW max) |
| Voltage | 832 Vdc (728–936 V) |
| AC Interface | 480 Vac, 3P+PE |
| Cooling | Liquid cooling |
| Ingress Protection | IP55 |
| Dimensions (W×D×H) | 1350 × 1300 × 2390 mm |
| Weight | 2.6 t |
| Operating Range | −30 … +50 °C |
Demand-charge and coincident-peak management, weak-grid support, EV charging hubs buffering fast-charger peaks.
Small offices, IT rooms, edge devices.
UL1973, UL9540A, UL9540, UN38.3
Arctium FLEX-313
A step up in power density from the FLEX-261, built on the same compact cabinet footprint — the workhorse size for mid-sized retail and light-industrial sites.
| Rated Energy | 313.5 kWh |
| Rated Power | 125 kW (137.5 kW max) |
| Voltage | 998.4 Vdc (873.6–1123.2 V) |
| AC Interface | 480 Vac, 3P+PE |
| Cooling | Liquid cooling |
| Ingress Protection | IP55 |
| Dimensions (W×D×H) | 1350 × 1300 × 2390 mm |
| Weight | 2.9 t |
| Operating Range | −30 … +50 °C |
Demand-charge and coincident-peak management, weak-grid support, EV charging hubs buffering fast-charger peaks.
Demand-charge and coincident-peak reduction, utility demand-response and capacity programs, tariff management.
UL1973, UL9540A, UL9540, UN38.3
Arctium FLEX-365
The highest-power FLEX cabinet, on 600 V AC service — suited to sites with a heavier demand-charge profile that still need single-cabinet simplicity.
| Rated Energy | 365.7 kWh |
| Rated Power | 175 kW (192.5 kW max) |
| Voltage | 1164.8 Vdc (1019.2–1310.4 V) |
| AC Interface | 600 Vac, 3P+PE |
| Cooling | Liquid cooling |
| Ingress Protection | IP55 |
| Dimensions (W×D×H) | 1350 × 1300 × 2390 mm |
| Weight | 3.0 t |
| Operating Range | −30 … +50 °C |
Demand-charge and coincident-peak management, weak-grid support, EV charging hubs buffering fast-charger peaks.
DC fast-charging hubs, fleet depots, transit and municipal yards, sites with constrained service capacity.
UL1973, UL9540A, UL9540, UN38.3
Arctium FLEX-418
The newest FLEX cabinet (Nov 2025 release), with an industry-leading active-balancing BMS and up to 10 units supported in parallel for larger blocks.
| Rated Energy | 418.0 kWh |
| Rated Power | ~209 kW (0.5P) |
| Voltage | 1331.2 Vdc (1164.8–1497.6 V) |
| AC Interface | — |
| Cooling | Liquid cooling |
| Ingress Protection | IP55 |
| Dimensions (W×D×H) | 1350 × 1300 × 2410 mm |
| Weight | 3.65 t |
| Operating Range | −30 … +50 °C |
Demand-charge and coincident-peak reduction, utility demand-response and capacity programs, tariff management.
DC fast-charging hubs, fleet depots, transit and municipal yards, sites with constrained service capacity.
IEC 61000, IEC 62477, IEC 62619, UN38.3
Ready to size a FLEX cabinet for your site?
Every capacity shown is per-unit nameplate. We'll size the exact configuration to your measured or forecast load.