ARQVOLTGrid 50.01 HzDiscuss a Project
Rows of battery containers lit at dusk

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Project

05

Renewable firming

Demonstration project

Altamira Solar Firming

Storage paired with an existing solar farm to deliver firm power after sunset.

Andalusia, Spain

Commissioned

2025

120 MW / 480 MWh

Power / energy

DC-coupled

Coupling

Shared 220 kV

Connection

4 hours

Duration

Sector

Storage

Technology

DC-coupled

Capacity

120 MW / 480 MWh

Client

Demo IPP

Delivery

14 months

(01) Challenge

What stood in the way

An existing solar farm was exporting almost nothing after sunset, just as prices peaked.

(02) Solution

What we built

A DC-coupled storage retrofit that shares the existing connection and shifts midday solar into the evening.

Grid-scale battery storage site beside a substation at dusk
Aerial view of a battery storage site beside an estuary
Close-up of a battery enclosure with cabling at its base

(03) Outcomes

What the system

delivers.

Illustrative demonstration figures.

+46%

Revenue per MWh

4 h

Firm evening supply

0

New grid capacity required

(04) System details

Under

the hood.

Key specifications of the delivered system. Illustrative values.

Power / energy

120 MW / 480 MWh

Coupling

DC-coupled

Connection

Shared 220 kV

Duration

4 hours

Let’s build infrastructure

for what’s next.

Tell us about your site, your load or your grid connection. An engineer — not a sales team — will reply within two working days.

Let’s build infrastructure

for what’s next.

Tell us about your site, your load or your grid connection. An engineer — not a sales team — will reply within two working days.

Let’s build infrastructure

for what’s next.

Tell us about your site, your load or your grid connection. An engineer — not a sales team — will reply within two working days.

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