Megacell

High Power,
Not Just Energy.

Grid-scale storage redefined: unmatched power density, ultra-fast charge (5 minutes), and lithium-free safety. Megacell delivers continuous nominal power for the world's most demanding grid applications.

Non-flammable, recyclable, and designed for 30,000+ cycles.

Up to 50.1 MW • 4,174 kWh • Charges in 5-minutes

Key Benefits

From frequency regulation to blackout prevention, Megacell delivers full nominal power continuously with the lowest OPEX in its class.

Power iconUnmatched Power

Continuous nominal output with peak rates up to 24C for high-demand grid events.

Cycles icon30,000+ Cycles

Ultra-long lifetime and minimal degradation under intensive duty cycles.

Safety iconLithium-Free & Safe

Non-flammable, recyclable carbon-based chemistry with wide operating temperatures.

Modular iconModular & Scalable

Factory-assembled units for fast rollout; scale from MW to multi-site fleets.

Grid iconGrid-Forming

Supports islanding, black-start, and dynamic stability for renewables integration.

OPEX iconLowest OPEX

Simplified maintenance, robust design, and OpenEMS automation reduce lifetime cost.

Megacell Product Line

Select the power block that matches your grid service window. All models designed for 5-minute high-power charge/discharge.

Megacell-2

Compact block for distributed assets and substation upgrades.

Power2 MW
Energy167 kWh
Full Charge Time 5 min
€/MW·cycle*€9.2

Megacell-10

Mid-scale grid services, ultra-fast response and high cycle count.

Power10 MW
Energy835 kWh
Full Charge Time 5 min
€/MW·cycle*€8.0

Megacell-50

Flagship unit for system-level stabilization and frequency containment.

Power50.1 MW
Energy4,174 kWh
Full Charge Time 5 min
€/MW·cycle*€6.7

* €/MW·cycle is calculated as (Price per MW ÷ 30,000 cycles). Pricing shown is indicative, excludes taxes/shipping, and varies by configuration. Specs and prices subject to change.

Technology

Unlike lithium-based storage, Megacell's carbon-based, lithium-free design enables continuous nominal power, rapid cycling, and non-flammable safety. The compact architecture and high specific power deliver immediate response for frequency events, renewables smoothing, and sub-5-minute services.

  • Carbon-based, lithium-free; recyclable and safe by design.
  • High C-rate capability (peaks up to 24C) for short-duration grid services.
  • Wide operating temperature, industrial-grade IP enclosure.
  • >30,000 cycles; minimal degradation under intensive use.

Monitoring & Control

OpenEMS: free cloud monitoring system with edge automation, utility-grade protocols, and real-time orchestration.

  • Protocols: Modbus, MQTT, WebSockets, REST API.
  • Core control modes: Direct Real Power Control; Ramp Rate Control; Frequency Support; Voltage Control; Remote & Automated Control; Power Factor Control; Virtual Inertia; Island/Grid-Forming Mode; Black Start Capability.
  • Fleet management, remote diagnostics, automated dispatch.
  • Role-based access, audit trails, configurable alerts.

Download Megacell Datasheet

Get the full specifications, electrical characteristics, and options. Enter your email to get the datasheet in PDF.

We'll email you the link and start the download. Privacy Policy

Configure & Pre-Order

Tell us about your project and we'll propose a configuration, pricing, and deployment plan.

We’ll reply with configuration & commercial terms. Privacy Policy

Pre-orders now open. Shipments begin Q1 2026, subject to project validation.

Contact

We operate from Barcelona and Bellaterra. Reach out for technical, commercial, or partnership inquiries.

Head Office

Tech Barcelona - Pier 01
Plaza Pau Vila 1, 2B
08039 Barcelona (Spain)

ICN2

INSTITUT CATALÀ DE NANOCIÈNCIA I NANOTECNOLOGIA (ICN2)
Edifici ICN2
UAB Campus, Bellaterra (Barcelona)
08193, Spain

Phone

+34 932 15 77 35
+34 635 93 45 92

Email

info@wattium.tech

sales@wattium.tech

Pre-orders and technical requests typically receive a response within 2–3 business days.