e-STORAGE

CSI-FlexBank-C-1672-2h

Grid-ScaleDC Block

Updated Aug 28, 2026

Grid-ScaleDC BlockUpdated Aug 28, 2026

e-STORAGE CSI-FlexBank-C-1672-2h is an LFP battery energy storage system with 1.672 MWh nominal energy and about a 2-hour duration. It is supplied as a DC block with liquid cooling and 0.836 MW rated DC power. The system provides 93% DC round-trip efficiency, uses 314 Ah prismatic cells, and weighs 68 tonnes (149,914 lb).

Use Cases

The specifications of e-STORAGE CSI-FlexBank-C-1672-2h suggest use in front of the meter, connected to the utility network itself. It belongs to the utility-scale class.

Capabilities

For e-STORAGE CSI-FlexBank-C-1672-2h, the specifications indicate grid services, work that helps keep the electricity network running, capacity value, being counted on as supply when the network is tight, and peak shaving, reducing the peak load at the connection point. Its shortest listed configuration is 2 h. Its DC block connects through a separate inverter, and that configuration points to renewable colocation, storing output from a wind or solar plant on the same site.

Nominal energy

1.67MWh

Rated DC power

0.84MW

Duration

2hour

C / P rate

0.5P

Round-trip efficiency (AC)

93 %DC

What does this system typically cost?

BESSBASE.com user price estimates for CSI-FlexBank-C-1672-2h 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
1.67MWh
Rated DC power
0.84MW
Duration
2 hour
C / P rate
0.5 P
Round-trip efficiency (DC)
93 %

Architecture

Installation
Indoor or outdoor

DC Side

Nominal DC voltage
1,331.2 V
DC voltage range
1,164.8 – 1,497.6 V

AC Side

Physical & Footprint

Dimensions (W × D × H)
10,510 × 2,724 × 3,150mm
Weight
68t

Battery Cells

Chemistry
LFP
Cell capacity
314 Ah
Cell format
Prismatic
Cell supplier
e-STORAGE (in-house)

Lifespan

Design life
20 years

Protection

Enclosure protection
IP55NEMA 3R
Corrosion protection
C4C5
Seismic rating
Zone 4
Fire & safety
Fire alarm panel, heat and smoke detection, alarm bell and strobe, Combustible gas detector with active ventilation, Aerosol-based suppression system, Dry pipe sprinkler system

Full Specification Sheet

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Plant Round-Trip Efficiency

Duration
duration 2 h
0.5C
—
State of health
new system
as-new
—
DC block
rte_dc 93 % @2 h
round trip @ 2 h
93 %
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
81.4 %
40 %100 %
1.229MWh 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
144m² total site area · 1 × 1
1,550 ft²0.0144 ha0.036 acres86.2 m² / MWh928 ft² / MWh
Unit W × D
10.51 × 2.72 m
34.48 × 8.94 ft
Site envelope
16.51 × 8.72 m
54.17 × 28.62 ft
Per unit
144 m²
Installed energy
1.67 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

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 CSI-FlexBank-C-1672-2h 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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