IA-250kW/500kWh

Name: IA-250kW/500kWh
Brand: Tesvolt

Industrial & CommercialAC Block

Updated Aug 28, 2026

Industrial & CommercialAC BlockUpdated Aug 28, 2026

Tesvolt IA-250kW/500kWh is an LFP battery energy storage system for commercial and industrial applications, with 509 kWh nominal energy and 2, 4, 6 and 8 hour configurations. It is supplied as an AC block with air or liquid cooling and 244 kW rated DC power. The system uses 306 Ah prismatic cells and weighs 4.5 tonnes (9,921 lb).

Use Cases

Tesvolt IA-250kW/500kWh has nominal energy in the commercial and industrial size class. It connects at 400 V and is certified to low-voltage grid connection rules (EN50549-1). These specifications indicate use behind the meter.

Capabilities

Its AC block includes the inverter, which points to renewable colocation, storing output from a wind or solar plant on the same site. The shortest listed configuration is 2 h, and the specifications suggest peak shaving, reducing the peak load at the connection point. The longest listed configuration, 8 h, makes Tesvolt IA-250kW/500kWh a candidate for capacity value, counting as firm supply toward a network's peak needs.

Nominal energy

0.51MWh

Rated AC power

0.25MW

Rated DC power

0.24MW

Duration

2–8flexible

What does this system typically cost?

BESSBASE.com user price estimates for IA-250kW/500kWh by Tesvolt 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

0.51MWh

Rated DC power

0.24MW

Rated AC power

0.25MW

Duration

2–8 hourflexible

Architecture

Installation

Outdoor-capable

DC Side

Nominal DC voltage

832 V

DC voltage range

728 – 936 V

AC Side

AC voltage

400 V

AC voltage parameters

3/N/PE

AC voltage range

360..440 V

Rated AC current

360.8 A

Grid frequency

50 Hz / 60 Hz

Physical & Footprint

Dimensions (W × D × H)

1,940 × 1,500 × 2,100mm

Weight

4.5t

Battery Cells

Chemistry

LFP

Cell capacity

306 Ah

Cell format

Prismatic

Cell supplier

Samsung SDI

Lifespan

Protection

Enclosure protection

IP55

Corrosion protection

Fire & safety

Smoke Detector, Heat Detector, Alarm Sounder, Aerosol, Sprinkler, Optional: Flammable Gas Detector, Vent Plate

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

typical @2 h

round trip @ 2 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

59.6m² total site area · 1 × 1

641 ft²0.006 ha0.015 acres116.8 m² / MWh1,257 ft² / MWh

Unit W × D

1.94 × 1.5 m

6.36 × 4.92 ft

Site envelope

7.94 × 7.5 m

26.05 × 24.61 ft

Per unit

59.6 m²

Installed energy

0.51 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 Tesvolt Systems

Vendor	System	Energy	Power	Duration	Battery Cell
Tesvolt	TESVOLT TALLONDC Block · 20 ft container	5.02MWh	2.5MWDC	2h0.5C	LFP314 Ah · Prismatic
Tesvolt	IA-125kW/500kWhAC Block · cabinet	0.51MWh	0.13MWAC	2–8hflex	LFP306 Ah · Prismatic
Tesvolt	IA-187kW/500kWhAC Block · cabinet	0.51MWh	0.19MWAC	2–8hflex	LFP306 Ah · Prismatic
Tesvolt	IA-250kW/500kWhAC Block · cabinet	0.51MWh	0.25MWAC	2–8hflex	LFP306 Ah · Prismatic
Tesvolt	IA-62.5kW/500kWhAC Block · cabinet	0.51MWh	0.06MWAC	2–8hflex	LFP306 Ah · Prismatic
Tesvolt	TESVOLT FORTONAC Block · cabinet	0.09MWh	0.09MWAC	1h1C	LFP
Tesvolt	TAYTAN/10-40DC Block · cabinet	0.06MWh	0.06MWDC	1h1C	LFP75 Ah · Prismatic
Tesvolt	TAYTAN/09-40DC Block · cabinet	0.06MWh	0.06MWDC	1h1C	LFP75 Ah · Prismatic
Tesvolt	TAYTAN/08-40DC Block · cabinet	0.05MWh	0.05MWDC	1h1C	LFP75 Ah · Prismatic
Tesvolt	TAYTAN/06-40DC Block · cabinet	0.04MWh	0.04MWDC	1h1C	LFP75 Ah · Prismatic
Tesvolt	TAYTAN/07-40DC Block · cabinet	0.04MWh	0.04MWDC	1h1C	LFP75 Ah · Prismatic
Tesvolt	TAYTAN/05-40DC Block · cabinet	0.03MWh	0.03MWDC	1h1C	LFP75 Ah · Prismatic

View all 14 Tesvolt systems

About the Vendor

TesvoltTier-2Listed Company

TESVOLT, founded in 2014, makes battery energy storage systems and integrates them from Lutherstadt Wittenberg, Germany. It has delivered more than 6,000 storage projects worldwide and reported 13.5 GWh of cumulative deployments, and its lithium-ion systems serve commercial, industrial, and utility-scale uses while the company expands its Wittenberg headquarters with a gigafactory designed for 4 GWh of annual production.

Production scale2-20 GWh

Company sizeSmall (1-300)

Vertical integrationMinimal

BankabilityNeutral

View the full Tesvolt profile →

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This profile of IA-250kW/500kWh by Tesvolt is assembled exclusively from public data to support early-stage screening and requires additional due diligence.

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