CSI-FlexBank-S-8360-4h

Name: CSI-FlexBank-S-8360-4h
Brand: e-STORAGE

Grid-ScaleDC Block

Updated Aug 28, 2026

Grid-ScaleDC BlockUpdated Aug 28, 2026

e-STORAGE CSI-FlexBank-S-8360-4h is an LFP battery energy storage system with 8.36 MWh nominal energy. This DC block provides about a 4-hour duration and 2.09 MW rated DC power. It uses liquid cooling, achieves 94% DC round-trip efficiency, and contains 314 Ah prismatic cells.

Use Cases

e-STORAGE CSI-FlexBank-S-8360-4h has nominal energy in the utility-scale size class. This specification points to use in front of the meter, on the utility's side of the connection.

Capabilities

e-STORAGE CSI-FlexBank-S-8360-4h has a shortest listed configuration of 4 h, which 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, since its DC block connects through a separate inverter. A listed 4 h configuration makes it a candidate for energy shifting, storing charge and releasing it hours later.

Nominal energy

8.36MWh

Rated DC power

2.09MW

Duration

4hour

C / P rate

0.25P

Round-trip efficiency (AC)

94 %DC

What does this system typically cost?

BESSBASE.com user price estimates for CSI-FlexBank-S-8360-4h 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

8.36MWh

Rated DC power

2.09MW

Duration

4 hour

C / P rate

0.25 P

Round-trip efficiency (DC)

94 %

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

Grid frequency

50 Hz / 60 Hz

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

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 4 h

0.25C

—

State of health

new system

as-new

—

DC block

rte_dc 94 % @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

144m² total site area · 1 × 1

1,550 ft²0.0144 ha0.036 acres17.2 m² / MWh185 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

8.36 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.

More e-STORAGE Systems

Vendor	System	Energy	Power	Duration	Battery Cell
e-STORAGE	CSI-FlexBank-S-8360-2hDC Block · cabinet	8.36MWh	4.18MWDC	2h0.5C	LFP314 Ah · Prismatic
e-STORAGE	CSI-FlexBank-S-8360-4hDC Block · cabinet	8.36MWh	2.09MWDC	4h0.25C	LFP314 Ah · Prismatic
e-STORAGE	CSI-SolBank-S-PL-5016-2h-EUDC Block · 20 ft container	5.02MWh	2.4MWDC	2h0.5C	LFP
e-STORAGE	CSI-SolBank-S-PL-5016-4h-EUDC Block · 20 ft container	5.02MWh	1.2MWDC	4h0.25C	LFP
e-STORAGE	CSI-SolBank-S-5016-4h-EUDC Block · 20 ft container	5.02MWh	1.2MWDC	4h0.25C	LFP314 Ah · Prismatic
e-STORAGE	CSI-SolBank-S-5016-2h-EUDC Block · 20 ft container	5.02MWh	2.35MWDC	2h0.5C	LFP314 Ah · Prismatic
e-STORAGE	PowerBlock ESPB-2H \| ESPB-4HAC Block	4.8MWh	—	1.5–4hflex	LFP
e-STORAGE	CSI-FlexBank-C-1672-4hDC Block · cabinet	1.67MWh	0.42MWDC	4h0.25C	LFP314 Ah · Prismatic
e-STORAGE	CSI-FlexBank-C-1672-2hDC Block · cabinet	1.67MWh	0.84MWDC	2h0.5C	LFP314 Ah · Prismatic

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

View the full e-STORAGE profile →

How to Read the Product Page

This profile of CSI-FlexBank-S-8360-4h by e-STORAGE is assembled exclusively from public data to support early-stage screening and requires additional due diligence.

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