SAJ CM2-125K-261-EU
SAJ CM2-125K-261-EU is an all-in-one C&I battery energy storage system rated 125 kW and 261 kWh.
- Battery ships inside the cabinet: no separate B2, BU3 or CB3 battery to order or commission on site.
- Up to 98% max efficiency and 96.0% max battery-to-AC efficiency on the CHS2 range, per SAJ's datasheet.
- ≥8000 cycles at 70% end-of-life on the CM2 battery bank, per SAJ's datasheet.
- IP54–IP66 rated enclosures for outdoor plant-room siting, liquid- or forced-air cooled depending on model.
- Manufacturer
- SAJ
- Model code
- CM2-125K-261
- Item no.
- DLK-SAJ-CM2125K261EU
- Delivery
- Delivery included in your Proforma
Plan with CM2-125K-261
New system, extension or replacement? Linker Advisor starts from this article and asks only for what is still open — existing model, quantity, postcode, installation date.
Figures transcribed from the manufacturer datasheet on file. Confirm your grid code and configuration with our engineers before ordering.
- GoodWe · SAJ · Pylontech · EcoFlow · Chint paired from the maker’s own lists
- Datasheets on file for every item
- Within 24 h engineering response
- MOQ 1 unit · EU delivery
- Engineering-checked configurations
Storage without a re-design.
AC-coupled storage drops in behind the existing string inverters - no PV rewiring.
Energy and power
261 kWh of LFP capacity behind a 125 kW PCS, 137.5 kW maximum charge and discharge.
Inspect it before you spec it.
Official renders, installation photos and system panels for this model line.
Manufacturer product image from the official datasheet.
SAJ CM2 all-in-one system, official render from the SAJ datasheet
Real product photography, eye-gated 2026-07-11.
Cabinet interior at a real installation: battery packs and PCS. Installer photo, Wettersol (Sweden).
Specifications
Every value exactly as published in the official CM2-125K-261 documentation.
Documents
Complete the system
Balance-of-system and accessories paired with this model. Every pairing follows the manufacturer's official compatibility list.
SAJ eManager-C1 Pro communication box
- [1]SAJ eManager-C1 Pro communication box
Pick the rating
SAJ family. Same engineering, different size.
Every figure comes straight from the manufacturer's official datasheet.
Configuration 3
Both cabinets carry the same 261 kWh LFP battery bank; the PCS rating is the only difference.
- CM2-99.9K-261-EU: 99.9 kW rated and maximum charge and discharge, 151.7 A at 380 V or 144 A at 400 V.
- CM2-125K-261-EU: 125 kW rated and 137.5 kW maximum, 208.9 A at 380 V or 198.5 A at 400 V.
- Shared platform: a 260S1P bank of 3.2 V / 314 Ah LFP cells in 5 packs, 832 V rated battery voltage, one 2325 x 1030 x 1400 mm cabinet at 2600 kg.
- Selection: pick the 125 kW unit where the load profile needs faster charge and discharge from the same energy block.
No. The CM2 is a battery energy storage system that couples on the AC side, not a hybrid inverter cabinet.
- Inside the cabinet: battery packs, PCS, BMS, EMS, temperature control, fire protection and monitoring.
- Coupling: it connects on the AC side at 380/400 V, next to whatever generation the facility already runs.
- Power quality: non-isolated topology, power factor above 0.99 and adjustable from 1.0 to -1.0, THDi below 3 percent per SAJ's datasheet.
The EMS is built into the cabinet, so the standard operating modes run on the cabinet controller without an external energy manager.
- Operating modes: maximum self-consumption, time-of-use and VPP scheduling execute locally in the cabinet.
- Communication: Wi-Fi, Ethernet and RS485 interfaces are built in.
- Plant supervision: de-linker lists the SAJ eManager-C1 Pro communication box with this family as the monitoring and EMS accessory.
Availability & compliance 1
SAJ's datasheet lists grid standards CEI-021, CEI-016, EN 50549-1 and EN 50549-2, with safety and EMC per IEC 62619, IEC 62477-1, IEC 61000-6-2, IEC 61000-6-4 and UN 38.3.
- Grid connection: EN 50549-1 and EN 50549-2 plus CEI-021 and CEI-016 are the printed grid codes for this series.
- Safety and transport: IEC 62619 covers the battery, IEC 62477-1 the power conversion, and UN 38.3 the lithium transport.
- German projects: the datasheet names no German unit certificate, so confirm the certificate set your grid operator requires with the quote.
Installation & wiring 1
The CM2 arrives as one outdoor-capable cabinet; plan the foundation and the AC feed before delivery.
- AC connection: 380/400 V three-phase, 3L+N+PE, 50 Hz. Maximum current is 151.7 A at 380 V on the 99.9 kW model and 208.9 A at 380 V on the 125 kW model.
- Footprint and mass: 2325 x 1030 x 1400 mm (H x W x D) at 2600 kg; the pad and the lifting plan must handle the full weight.
- Environment: IP54 cabinet with an IP65 PCS, C4 corrosion protection, -25 to +55 C operation, 0 to 95 percent non-condensing humidity, up to 2000 m altitude.
Operation & warranty 1
SAJ warrants the CM2 for 10 years and rates the LFP bank at 8000 cycles or more to 70 percent end of life.
- Depth of discharge: 0 to 100 percent, so the full 261 kWh rated energy is available to the schedule.
- Round-trip efficiency: above 90 percent at 0.25C and above 88 percent at 0.5C per SAJ's datasheet.
- Thermal system: liquid cooling on the battery and forced air on the PCS across the -25 to +55 C operating range.
- Fire protection: aerosol suppression at pack level and cabinet level; the packs themselves are IP67.
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