Buy power when it's cheap.
Use it when it's not.
The EASS125K is an all-in-one commercial battery in a single outdoor cabinet — 261 kWh of liquid-cooled LFP storage with its own power electronics. It charges when electricity is cheap, carries your site through expensive peak hours, and helps keep designated critical loads running when the grid fails.
Why storage pays: the peak spread
Energy you use in the evening peak is the most expensive of the day. Store it overnight and that same energy costs the off-peak rate.
EASS125K — Grid battery
Storage only: peak-shaving, time-of-use shifting and backup. No solar input and no generator control built in.
EAPVESS130K — Hybrid microgrid
Adds up to 260 kW of solar input and diesel-generator control to the same 261 kWh battery. Compare →
Rs 17,176,000 gets you
The complete all-in-one cabinet: the three-level power-conversion system (PCS), 261 kWh of LFP battery, liquid cooling, integrated fire protection and the on-board EMS — factory-integrated and delivered as one outdoor unit. Not included: solar panels (this is a storage-only system — for built-in solar and generator control, see the EAPVESS130K), and site works — civil foundations, three-phase connection, grid-interface engineering and any generator/ATS integration — which are confirmed on a commercial site survey because they vary so much by site.
Indicative equipment price for the all-in-one cabinet. VAT, price validity and any exchange-rate adjustment, plus civil works, the three-phase connection, delivery and commissioning, are confirmed on your engineering quotation.
One cabinet, three jobs.
Charge when power is cheap
The battery draws from the grid during off-peak hours — overnight and other low-tariff windows — filling 261 kWh at up to 125 kW.
Discharge to flatten your peak
During expensive peak-tariff hours the cabinet powers your site from stored energy instead of the grid — cutting both the units you buy at peak rates and your maximum demand (kVA) charge.
Back up critical loads
With its off-grid capability the system carries selected critical loads through a grid outage, serving as a backup power source for operations that cannot stop.
Why sites choose the EASS125K.
Lower your peak-demand bill
Shift consumption out of peak tariff windows and shave your maximum demand. Outcomes depend on your tariff, load profile and operation.
261 kWh / 125 kW in one cabinet
Integrated PCS + LFP battery + cooling + fire protection, with a three-level topology and ≥90% round-trip system efficiency.
Long life — ≥8,000 cycles
Long-life LFP cells rated for over 8,000 cycles at 25°C, with a high-precision self-calibrating BMS for consistent capacity over the years.
Liquid-cooled, transformer-free
Liquid cooling holds cell-to-cell temperature difference under 3°C and cuts auxiliary power ~30%; the all-in-one design has no separate transformer and roughly 40% less footprint.
Safe by design
LFP chemistry, cell explosion-venting, PACK-grade perfluorohexanone fire suppression with active monitoring and water fire protection, plus EPO and door lock.
Cloud-monitored, low-maintenance
Remote cloud monitoring with real-time fault warning and remote/local firmware upgrades — intelligent maintenance with no expert needed permanently on site.
Three ways it earns its keep.
Time-of-use arbitrage
Charge 261 kWh on cheap off-peak power and discharge it during peak-tariff hours. The saving is the gap between your peak and off-peak rates, every cycle.
Peak-demand (kVA) shaving
By supplying your evening spike from the battery, the cabinet holds down the maximum demand the meter records — the charge that is often the largest fixed line on a commercial bill.
Backup that avoids downtime
Off-grid load-carrying keeps critical operations running through an outage — avoiding the cost of stopped production, lost cold-chain or disrupted service.
| Grid export | Not required for savings — designed for self-consumption and backup |
| Solar | Not required, and not built in. Can sit alongside existing PV on the AC side |
| Generator | Not controlled by this unit. For diesel orchestration choose the EAPVESS130K |
| Fuel | None — the system moves grid energy through time, it does not generate |
Savings depend on your CEB tariff, the peak/off-peak spread, load profile, battery size and installation design, and are modelled for your site in the proposal.
Full specifications
| Rated power / energy | 125 kW / 261 kWh |
| Cell chemistry | LFP 3.2V / 314Ah, 1P260S |
| Battery voltage | 832 Vdc (650–936 Vdc range) |
| Round-trip efficiency | ≥90% |
| Cycle life | ≥8,000 cycles @ 25°C |
| Cooling | Liquid-cooled |
| Cabinet (W×H×D) | 1000 × 2350 × 1350 mm, ≤2500 kg |
| Warranty | Up to 10-year warranty on eligible EAST ESS packages, confirmed on quotation |
System role
Grid-tied battery for peak-shaving, time-of-use load-shifting and backup for critical loads. Can be paired with existing commercial PV on the AC side. Sized to your load profile and objectives.
Works with
Existing commercial PV arrays and EV charging; expandable capacity via additional EAST battery cabinets, per project design.
Installation requirements
Outdoor cabinet siting, three-phase commercial connection, grid-interface engineering and commissioning by MyEnergy Solutions.
EASS125K / 261kWh-C — Full specifications
| Cell | LFP 3.2V / 314Ah |
| System battery configuration | 1P260S |
| Rated capacity | 261 kWh |
| Rated voltage | 832 Vdc |
| Voltage range | 650–936 Vdc |
| Rated power | 125 kW |
| Rated voltage | 400 Vac |
| Voltage range | −20% ~ +15% |
| Rated frequency | 50/60 Hz |
| Frequency range | 45–55 Hz / 55–65 Hz |
| Power factor | ±1 |
| THDi | ≤3% |
| Overload capacity | 110% |
| Rated power | 125 kW |
| Rated voltage | 400 Vac |
| Rated frequency | 50/60 Hz |
| THDv | ≤3% |
| AC wiring mode | Three-phase four-line |
| System efficiency | ≥90.0% |
| Charge / discharge rate | 0.5P (≈2-hour) |
| Cycles | ≥8,000 @ 25°C |
| IP rating | Battery IP67 · PCS IP66 · System IP54 |
| Operating temperature | −30°C ~ 55°C |
| Relative humidity | 0–95% RH (non-condensing) |
| Altitude | <3000 m (derate above 3000 m) |
| Cooling method | Liquid cooling |
| Fire protection | Perfluorohexanone (PACK grade) + active monitoring + water fire protection |
| Communication | LAN, RS485, TCP/IP, IEC61850 |
| Dimensions (W×H×D) | 1000 × 2350 × 1350 mm |
| Weight | ≤2500 kg |
Built for commercial & industrial sites.
Malls & commercial buildings
Trim peak-demand charges and keep essential systems live during outages.
Factories & industrial parks
Shift load out of peak windows and protect production from grid interruptions.
PV storage & EV charging stations
Buffer demand at charging hubs and pair with existing solar on the AC side.
Public & institutional buildings
Reliable backup and lower running costs for hospitals, campuses and offices.
Up to 10-year warranty
10-year warranty on eligible EAST ESS packages. Final warranty terms and covered components are confirmed in your official quotation. Specifications are taken from the official EAST datasheet. MyEnergy Solutions is the authorised EAST Group distributor for Sri Lanka and the Maldives.
Frequently asked
What's the difference between this and the EAPVESS130K?
How does it save money?
Can it run my site during a power cut?
Do I need solar panels for it to work?
Is it suitable for outdoor installation?
How is it sized for my site?
Related products
Savings: actual savings depend on your load profile, tariff, battery size, usage timing and installation design.
Grid export: not required for savings. This system is designed for self-consumption and backup, so savings projections do not assume export revenue; any site-specific connection, protection or utility requirements are confirmed during engineering review.
Specifications and warranty: specifications per the official EAST datasheet; warranty coverage of up to 10 years, confirmed on quotation and local project scope.