Freqcon

BESS MAX PB.2 8.8 MW / 20 MWh

Grid-ScaleAC BlockContainerized

Updated Sep 28, 2026

Grid-ScaleAC BlockContainerizedUpdated Sep 28, 2026

For utility-scale use, Freqcon BESS MAX PB.2 8.8 MW / 20 MWh is a containerized LFP battery energy storage system. It is supplied as an AC block with about a 2.27-hour duration. Liquid cooling supports 98.3% AC and 99.4% DC round-trip efficiency.

Use Cases

Freqcon BESS MAX PB.2 8.8 MW / 20 MWh has nominal energy in the utility-scale size class and is certified to medium- or high-voltage grid connection rules (VDE 4110). It ships as a block of 5 containers. Together these specifications indicate use in front of the meter.

Capabilities

Rated at 0.5P, the specifications indicate grid services, support for the operation of the electricity network, and peak shaving, cutting the power drawn from the grid at peak times. The shortest listed configuration of 2.27 h suggests capacity value, counting as firm supply toward a network's peak needs. An AC block that includes the inverter makes Freqcon BESS MAX PB.2 8.8 MW / 20 MWh a candidate for renewable colocation, operating alongside a wind or solar plant on one site.

Nominal energy

20MWh

Rated AC power

8.8MW

Duration

2.27hour

C / P rate

0.5P

Round-trip efficiency (AC)

98.3 %AC

What does this system typically cost?

BESSBASE.com user price estimates for BESS MAX PB.2 8.8 MW / 20 MWh by Freqcon and similar storage systems. The ranges are LDP (Landed Duty Paid) prices per kWh that cover all expenses of delivering the goods to the buyer's premises, including production, shipping, sales margins, and import duties.

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Energy & Power

Nominal energy
20MWh
Rated AC power
8.8MW
Duration
2.27 hour
C / P rate
0.5 P
Round-trip efficiency (AC)
98.3 %
Round-trip efficiency (DC)
99.4 %

Architecture

Container count
5
Installation
Outdoor-capable

DC Side

AC Side

AC voltage
690 V
Rated AC current
Up to 4 x 2,200 A
Grid frequency
50 Hz / 60 Hz

Physical & Footprint

Battery Cells

Chemistry
LFP
Cell supplier
CATL, Hithium, EVE

Lifespan

Cycle life
10,000 cycles>

Protection

Enclosure protection
IP54
Corrosion protection
C3

Full Specification Sheet

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Plant Round-Trip Efficiency

Duration
duration 2.3 h
0.44C
—
State of health
new system
as-new
—
DC block
rte_dc 99.4 % @2.3 h
round trip @ 2.3 h
99.4 %
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
−4.6 pts
Plant Round-Trip Efficiency at the Point of Interconnection
87.0 %
40 %100 %
1.15MWh 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.

More Freqcon Systems

4
CompareLogoVendorSystemEnergyPowerDurationBattery CellOpen
Freqcon37.5MWh8.8MWAC4.26h0.25CLFP
Freqcon
BESS MAX PB.2 8.8 MW / 20 MWhAC Block
20MWh8.8MWAC2.27h0.5CLFP
Freqcon18.8MWh4.4MWAC4.26h0.25CLFP
Freqcon10MWh4.4MWAC2.27h0.5CLFP

About the Vendor

FreqconTier-2Listed Company

Founded in 1988, Freqcon is a German BESS and power-conversion maker based in Rethem, Germany. It focuses on energy storage, frequency converters, and ultracapacitors, and its Freqcon BESS FQ platform works with more than 20 battery types from 350 kW to more than 50 MW, including a 900 kWh installation that used Audi e-tron batteries.

Production scale0.2-1 GWh
Company sizeSmall (1-300)
Vertical integrationMedium
BankabilityNeutral

How to Read the Product Page

This profile of BESS MAX PB.2 8.8 MW / 20 MWh by Freqcon 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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