The Atmoce M-ELV Battery MS-7K-U is a 7kWh AC-coupled home battery built around Lithium Iron Phosphate (LFP) chemistry, designed to operate at an extra-low DC voltage below 30V for enhanced safety compared with conventional high-voltage battery systems. With 4.5kW nominal and 5kW maximum discharge power, it is compatible with both single-phase and three-phase installations and can integrate with third-party PV inverters and energy management systems.
Rated IP66 for demanding installation environments and backed by a 15-year manufacturer warranty, the MS-7K-U supports backup, self-consumption, time-of-use and grid ancillary service operating modes, all managed remotely via the ATMOCE Cloud and ATMOZEN app.
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7kWh
Battery Energy
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<30V
Extra-Low DC Voltage
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5kW
Max. Discharge Power
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IP66
Ingress Protection
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15 Yrs
Warranty
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90%
AC Round-Trip Efficiency
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Please Note: The MS-7K-U operates via ATMOCE Gateway-managed services (backup, self-consumption, TOU and grid ancillary modes). A compatible Atmoce M-Combiner and M-Gateway are required for full system functionality.
Extra-Low-Voltage Safety
Operates at a DC voltage below 30V, well under the extra-low voltage safety threshold, with 5-layer advanced safety protection built into the LFP cell design.
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Flexible AC-Coupled Integration
Being AC-coupled and compatible with third-party PV and EMS systems, the MS-7K-U can be retrofitted onto existing solar installations regardless of the original inverter brand.
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Modular Scalability
A modular design supports quick, flexible scaling, allowing multiple battery units to be added to expand system capacity as household energy needs grow.
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Multiple Operating Modes
Supports backup, self-consumption, time-of-use (TOU) and grid ancillary service modes, adapting to different tariff structures and resilience requirements.
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Weatherproof Durability
An IP66-rated enclosure withstands immersion up to 50cm and resists severe weather, suiting a wide range of installation locations including floor or wall mounting.
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Intelligent Cloud Management
Managed through the ATMOCE Cloud and ATMOZEN app, giving homeowners and installers remote visibility and control of charging, discharging, and system status.
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| Electrical Parameters |
| Nominal output power |
4.5 kW |
| Max. output power |
5 kW |
| Nominal input power |
3.75 kW |
| Nominal voltage |
220/380 V or 230/400 V |
| Operating voltage range (L to N) |
176 to 276 V |
| Nominal frequency |
50/60 Hz |
| Frequency range |
45-55 Hz @50Hz, 55-65 Hz @60Hz |
| Max. input current |
17.05A @220Va.c. / 5.70A @380Va.c. |
| Max. output current |
22.73A @220Va.c. / 7.58A @380Va.c. |
| Power factor (adjustable) |
0.8 leading to 0.8 lagging |
| AC round-trip efficiency |
90% |
| Total harmonic distortion (THDi) |
<3% |
| Battery Parameters |
| Battery energy |
7 kWh |
| Chemistry |
Lithium Iron Phosphate (LFP) |
| Nominal DC voltage |
25.6 V |
| Max. DC voltage |
29.2 V |
| Warranty |
15 years |
| Mechanical & Environmental |
| Dimensions (H x W x D) |
830 x 480 x 195 mm (without bracket) |
| Lifting weight |
73.5 kg (without bracket) |
| Mounting |
Floor or wall mount |
| Ambient operating temperature range |
-20°C to 55°C |
| Optimum operating temperature range |
0°C to 30°C |
| Storage temperature range |
-20°C to 55°C |
| Ingress rating |
IP66 |
| Cooling |
Intelligent air cooling |
| Operating humidity |
4% to 100%, condensing |
| Altitude |
Up to 3000m |
| Pollution rating |
PD3 |
| Operation noise |
<35 dB |
| Features & Compliance |
| AC surge protection |
Type II |
| AC port overvoltage class |
III |
| Indicator |
LEDs for SOC and status |
| Communication |
CAN |
| Insulation resistance monitor |
Yes |
| Operating services |
Backup, self-consumption, TOU, grid ancillary services (requires ATMOCE Gateway) |
| Cloud service |
ATMOCE Cloud and ATMOZEN App |
| Compliance |
IEC 62619, ISO 13849, IEC 61000-6-1, IEC 61000-6-3, IEC 63056, IEC 62477-1, VDE-AR-E 2510-50 |
Why does the MS-7K-U operate at such a low DC voltage?
Operating below 30V DC significantly reduces electric shock and fire risk compared with conventional high-voltage battery systems, and is combined with 5-layer advanced safety protection in the cell design for added resilience.
Can the MS-7K-U be added to an existing solar system from another brand?
Yes. The battery is AC-coupled and compatible with third-party PV inverters and energy management systems, making it well suited to retrofitting onto existing installations.
What operating modes does the battery support?
The MS-7K-U supports backup power, self-consumption optimisation, time-of-use (TOU) tariff management, and grid ancillary services, all managed through an ATMOCE Gateway.
Can multiple MS-7K-U units be combined for more storage?
Yes. The modular design allows multiple battery units to be scaled together to increase total system capacity as household energy demand grows.
Is the battery suitable for outdoor installation?
Yes. It carries an IP66 ingress rating with resistance to immersion up to 50cm and severe weather, and supports both floor and wall mounting.
What is the warranty on the MS-7K-U?
The MS-7K-U is backed by a 15-year manufacturer warranty.
