Ampace

UniC AG440 External Inverter 4H System

Industrial & CommercialAC Block

Updated Sep 28, 2026

Industrial & CommercialAC BlockUpdated Sep 28, 2026

For commercial and industrial use, Ampace UniC AG440 External Inverter 4H System is an LFP battery energy storage system supplied as an AC block, with 440 kWh nominal energy and about a 4-hour duration. It uses pack liquid cooling or PCS air cooling and has 530 Ah prismatic cells. The system weighs 4.6 tonnes (10,141 lb).

Use Cases

Ampace UniC AG440 External Inverter 4H System has an energy capacity in the commercial and industrial class and connects at 400 V, a low-voltage AC connection. These specifications indicate use behind the meter.

Capabilities

Ampace UniC AG440 External Inverter 4H System has a shortest listed configuration of 4 h. That configuration points to capacity value, standing in as firm capacity when demand peaks. The specifications suggest renewable colocation, operating alongside a wind or solar plant on one site: its AC block includes the inverter.

Nominal energy

0.44MWh

Rated AC power

0.09MW

Duration

4hour

C / P rate

0.25P

What does this system typically cost?

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Energy & Power

Nominal energy
0.44MWh
Rated AC power
0.09MW
Duration
4 hour
C / P rate
0.25 P

Architecture

Installation
Outdoor-capable

DC Side

AC Side

AC voltage
400 V
AC voltage parameters
3P3W
Rated AC current
146 A
Grid frequency
50 Hz / 60 Hz

Physical & Footprint

Dimensions (W × D × H)
1,470 × 1,500 × 2,490mm
Weight
4.6t

Battery Cells

Chemistry
LFP
Cell capacity
530 Ah
Cell format
Prismatic Next-Gen 500+ Ah
Cell supplier
Ampace (in-house)

Lifespan

Protection

Enclosure protection
IP55
Corrosion protection
C4-M
Fire & safety
Smoke sensor, Heat sensor, Gas sensor, Audible & Visual alarm, Aerosol, Water port, Ventilation system, Explosion venting panel

Full Specification Sheet

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Plant Round-Trip Efficiency

Duration
duration 4 h
0.25C
—
State of health
new system
as-new
—
DC block
typical @4 h
round trip @ 4 h
94 %
PCS (DC/AC)
typical default
each way
97.02 %
Transformer LV/MV
typical default
each way
98.01 %
Transformer MV/HV
typical default
each way
98.01 %
Cables (all segments)
typical default
each way
98.8 %
Auxiliary power (plant's own consumption)
typical default
−4.3 pts
Plant Round-Trip Efficiency at the Point of Interconnection
82.2 %
40 %100 %
1.216MWh charged for every 1 MWh discharged
Both measured at the grid connection point. The plant's own power use is already included in the losses.

The calculator estimates the full "plant" round-trip efficiency (RTE) at the point of interconnection. Some values are pre-blocked depending on information on a particular ESS. The rows that are marked "each way" are one-way efficiencies; they are applied on charge and again on discharge. We then square them. To enter a bundled PCS efficiency value, use its rated-power value, not peak. If the PCS skid already includes the LV/MV transformer, set Transformer LV/MV to 100 % so those losses are not counted twice.

Site Space Required

single unit clearance 3 m / side
56m² total site area · 1 × 1
603 ft²0.0056 ha0.014 acres127.3 m² / MWh1,371 ft² / MWh
Unit W × D
1.47 × 1.5 m
4.82 × 4.92 ft
Site envelope
7.47 × 7.5 m
24.51 × 24.61 ft
Per unit
56 m²
Installed energy
0.44 MWh
1 × nameplate
Units1
Per row1
Clearance between unitsShared

Shared: one 3 m aisle serves both neighbours. Dedicated: each unit keeps its own 3 m, so gaps double to 6 m.

Clearance allowance
6m per axis · 3 m per side
19.69 ft per axis · 9.84 ft per side

Single unit — matches the stored area_sqm convention.

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About the Vendor

AmpaceTier-2Private Company

Founded in 2021, Ampace is a CATL and Amperex Technology Limited joint venture based in Xiamen, China. It makes lithium-ion cells, battery packs, and integrated energy storage systems for commercial, industrial, residential, and renewable energy uses, and it reports shipping more than 2.45 million ESS units and over 65 million cells in more than 30 countries and regions.

Production scale0.2-1 GWh
Vertical integrationHigh
BankabilityNeutral

How to Read the Product Page

This profile of UniC AG440 External Inverter 4H System by Ampace is assembled exclusively from public data to support early-stage screening and requires additional due diligence.

Always confirm these terms and technical specifications directly with the vendor and project stakeholders. Reflect all agreed-upon details in the legal agreements before making any investment decisions.

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