e-STORAGE

PowerBlock ESPB-2H | ESPB-4H

Grid-ScaleAC BlockContainerized

Updated Aug 28, 2026

Grid-ScaleAC BlockContainerizedUpdated Aug 28, 2026

e-STORAGE PowerBlock ESPB-2H | ESPB-4H is a containerized LFP battery energy storage system supplied as an AC block. It provides 4.8 MWh nominal energy in 1.5 and 4 hour configurations. Liquid or forced-air cooling supports 90% AC round-trip efficiency.

Use Cases

Use in front of the meter is consistent with the specifications of e-STORAGE PowerBlock ESPB-2H | ESPB-4H. Its energy capacity is within the utility-scale range, and it connects at medium voltage, 10 kV.

Capabilities

The shortest listed configuration of 1.5 h makes e-STORAGE PowerBlock ESPB-2H | ESPB-4H a candidate for peak shaving, reducing the peak load at the connection point; that configuration indicates grid services, support that helps operators run the electricity network. The specifications suggest energy shifting, taking in power and returning it hours later, and the longest listed configuration of 4 h makes it a candidate for capacity value, standing in as firm capacity when demand peaks. Its AC block includes the inverter and points to renewable colocation, sitting next to a wind or solar plant and sharing its grid connection.

Nominal energy

4.8MWh

Duration

1.5–4flexible

Round-trip efficiency (AC)

90 %AC

What does this system typically cost?

BESSBASE.com user price estimates for PowerBlock ESPB-2H | ESPB-4H by e-STORAGE 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
4.8MWh
Duration
1.5–4 hourflexible
Round-trip efficiency (AC)
90 %

Architecture

Installation
Indoor or outdoor

DC Side

AC Side

AC voltage
10 kV
Grid frequency
50 Hz / 60 Hz

Physical & Footprint

Battery Cells

Chemistry
LFP
Cell supplier
e-STORAGE (in-house)

Lifespan

Protection

Enclosure protection
NEMA 3R
Fire & safety
Smoke, heat, gas detection, active ventilation, local and remote emergency stop

Full Specification Sheet

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Plant Round-Trip Efficiency

Duration
duration 1.5 h
0.67C
—
State of health
new system
as-new
—
AC block (battery + PCS)
rte_ac 90 % @1.5 h
round trip @ 1.5 h
90 %
PCS (DC/AC)
Not Applicable for AC Block ESS
each way
—
—
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
81.1 %
40 %100 %
1.232MWh 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.

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About the Vendor

e-STORAGETier-1Listed Company

e-STORAGE is Canadian Solar’s battery energy storage business in Guelph and Kitchener, Ontario. Founded in 2001, Canadian Solar has shipped more than 20 GWh of battery energy storage systems to global markets, and its automated plants provide 15 GWh of annual BESS capacity and 3 GWh of battery cell capacity, along with system integration and EPC services for utility-scale projects.

Production scale0.2-1 GWh
Company sizeLarge (1000-10000)
Vertical integrationHighest
BankabilityNeutral

How to Read the Product Page

This profile of PowerBlock ESPB-2H | ESPB-4H by e-STORAGE 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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