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Bankability BloombergNEF Tier 1 · DNV
Flexible Storage Built for 2–4 Hour BESS Applications
Up to 96.5% Round-trip efficiency
835 kWh → GWh Flexible · Scalable · Standardised
+ 450 Projects Delivered
Who We Serve

Built for the teams
building Europe’s grid

From BESS project developers procuring OEM hardware to EPCs integrating systems — we're the direct link between your project and the right manufacturer.

BESS project developers and system integrators

BESS Developers & Integrators

  • Direct OEM procurement — no intermediaries
  • 835 kWh to multi-GWh project scale
  • Bankable LFP technology, lender-ready
  • Fast proposals aligned to your pipeline
EPC engineering and construction site for BESS projects

EPCs & Contractors

  • IEC-certified systems, ready to integrate
  • Full technical documentation & drawings
  • Competitive OEM pricing & reliable delivery
  • Warranty & after-sales support
High voltage electricity pylons for utilities and grid operators

Utilities & Grid Operators

  • FCR & aFRR-ready systems, pre-certified
  • Frequency regulation & peak shaving
  • Modular, scalable containerised architecture
  • Long-term O&M packages available
Infrastructure investors and funds evaluating BESS assets

Investors & Funds

  • Full bankability & due diligence package
  • 12,000+ cycle validated performance data
  • Technology risk benchmarking, DNV approved
  • De-risked, Tier-1 vetted technology
Rows of industrial stationary battery energy storage systems — utility-scale BESS
OEM Technology

Factory-direct BESS,
delivered to your project

Skip the intermediaries. mellon.energy gives BESS developers and EPCs direct access to CUBENERGY, CORNEX, and Hoymiles production lines — Tier-1 technology, bankable specs, competitive pricing.

View BESS technology
OEM Partners

Proven technology.
One point of contact.

Three OEM partners, one point of contact. Choose a fully AC-integrated plug-and-play system (CUBENERGY), a modular DC container with medium-voltage PCS station (Hoymiles), or a pure DC energy storage container (CORNEX) — all bankable, Tier-1 technology.

CUBENERGY logo
CUBEENERGY
Fully AC-Integrated · PCS Included · CORNEX-Powered

CUBENERGY delivers fully AC-integrated BESS systems — PCS, BMS, and grid connection in one unit, powered by CORNEX LFP cells. The PowerCombo-E5 (5 MWh / 20 ft) and FlexCombo 2.0 (835 kWh – 16 MWh AC block) combine CORNEX cell quality with complete AC integration. 220+ projects globally, 3,580 MWh across Europe.

  • Complete AC system — PCS, BMS & grid interface included
  • PowerCombo-E5: 5 MWh / 20 ft · FlexCombo 2.0: up to 16 MWh
  • Powered by CORNEX LFP cells — same proven cell technology
  • CORNEX cell quality with full AC integration · UL9540 / CE · DNV
Hoymiles logo
hoymiles
Modular DC Container · Medium-Voltage PCS Station · Global Manufacturer

Hoymiles supplies the HoyDC 5MWh containerized DC storage system paired with the HIM5175MV medium-voltage PCS station — integrating power conversion, transformer, and switchgear in one skid for direct 10–35 kV grid connection. Rated 8,000+ cycles, IP55 protection, UL9540A & IEC62619 certified.

  • HoyDC 5MWh DC container · 1164.8–1500 V · ≥8,000 cycles @70% SOH
  • HIM5175MV PCS-MV station · 5,175 kVA · AC 10–35 kV direct grid connection
  • Integrated PCS, transformer & RMU — skid-mounted, fast to install
  • UL9540A, IEC62619, IEC62477-1 certified · Intelligent liquid cooling
CORNEX New Energy logo
CORNEX
Pure Energy Storage · DC Container · Top-5 Global OEM

CORNEX New Energy supplies pure DC battery energy storage containers — the cell and pack technology at the heart of both CORNEX and CUBENERGY systems. The M5 (5 MWh · 314Ah & 588Ah cells) and M6 (6.25 MWh · 588Ah cells) offer maximum flexibility for EPCs integrating their own PCS. Top 5 globally, 90+ GWh delivered in 2025.

  • DC container — full flexibility for PCS selection & integration
  • M5: 5 MWh · M6: 6.25 MWh — same 20 ft footprint
  • Up to 96.5% efficiency · 12,000+ cycles · 190 Wh/kg
  • FCR & aFRR ready · BloombergNEF Tier 1 · D&B 5AA1
Reference Projects

Proven at scale.
Deployed across Europe.

Real-world BESS deployment — CUBENERGY and CORNEX systems proven in projects across Europe and China.

220+ European projects · 2,475 MW / 3,580 MWh installed (CUBENERGY, Dec 2025) · 90+ GWh delivered globally (CORNEX, 2025)

Selected Projects

CUBENERGY — European Projects

CUBENERGY 135MW/270MWh Leipzig Germany Standalone BESS
CUBENERGY
135 MW / 270 MWh
Standalone BESS · Leipzig, Germany

PowerCombo E5 AC Block · Frequency regulation, instantaneous reserve capacity & grid-forming inertia support · Energy arbitrage · Two sites: 90 MW/180 MWh + 45 MW/90 MWh

CUBENERGY 40MW/80MWh Finland Grid Ancillary Service
CUBENERGY
40 MW / 80 MWh
Grid Ancillary Service · Finland · 2024

PowerCombo-20C2H1200K · ms-level frequency response · FCR/FRR market · Renewable integration

CUBENERGY 30MW/43MWh Denmark TSO Black Start
CUBENERGY
30 MW / 43 MWh
Grid Auxiliary Service · Denmark · TSO

PowerCombo-20C2H1200K · Largest BESS in Denmark · Black Start capability · TSO flexibility services

CORNEX — Bulgaria & China

CORNEX containers shipped — RESTORE Bulgaria project
CORNEX
1,110 MWh
RESTORE Project · Bulgaria · Benchmark

Government benchmark project · Facilitates Bulgaria's energy transition · Grid stability & renewable integration · Wind + BESS

CORNEX 1000MW/4000MWh URUMQI China — aerial view
CORNEX
1,000 MW / 4,000 MWh
Standalone BESS · Urumqi, China · Huadian

World-scale standalone BESS · China Huadian · Grid stabilisation · Xinjiang renewable integration

Process

From first inquiry to
site-ready BESS

Simple. Fast. One point of contact for three world-class OEM manufacturers.

1

Share Requirements

Tell us your MW/MWh need, location, application, and timeline. We respond within 48 hours.

2

OEM Matching & Proposal

We identify the best fit — CUBENERGY, CORNEX, or Hoymiles — and deliver a tailored technical and commercial offer.

3

Complete Documentation

Full IEC certifications, LFP performance data, and warranty documentation — ready for your lenders and investors.

4

From Contract to Go-Live

We act as the communication and coordination bridge between customer and OEM — ensuring smooth factory alignment, European delivery logistics, commissioning support, and clear stakeholder communication all the way to operational go-live.

Why mellon.energy

The shortest path from
requirement to BESS.

We help BESS developers, EPCs, and utilities identify the best-fit BESS solution for their project — with direct OEM access, technical expertise, and European support from contract to commissioning.

Direct OEM Access

No re-sellers, no markups. Direct relationship with CUBENERGY, CORNEX, and Hoymiles factories — you get manufacturer-level pricing and support.

Your European Gateway to China's BESS Supply Chain

Our Munich-based team in Germany brings long-standing China expertise, a strong supplier network, and more than 25 years of experience in the Chinese market — including a deep understanding of local culture, business processes, and on-the-ground collaboration.

News

Latest from CUBENERGY
& CORNEX

CUBENERGY FlexCombo BESS
CUBENERGY · Product

FlexCombo 2.0 — Up to 16 MWh Modular BESS

New AC block platform for utility & C&I scale deployments. Cloud BMS, plug-and-play, IEC certified.

Read more →
CORNEX global market
CORNEX · Market

CORNEX Ranks Top 5 in Global BESS Shipments

Founded by Dai Deming, CORNEX reached Top 5 globally in H1 2025 and is now #2 in effective production capacity.

Read more →
CORNEX 588Ah LFP cell technology
CORNEX · Technology

CORNEX 588 Ah LFP Cell — 12,000 Cycles, 96.5% Efficiency

New large-format cell sets a benchmark for grid-scale BESS energy density at 190 Wh/kg and 419 Wh/L.

Read more →
Lithium market

Lithium carbonate — China spot price

Battery grade 99.5% Li₂CO₃  ·  CNY / tonne  ·  GFEX futures

Current 145,000 CNY/t
1M -7.1% vs. 1 month ago
52w High 200,500 CNY/t
52w Low 58,000 CNY/t
YTD -2.0% since Jan 1
Lithium carbonate rallied from about 60,000 to a two-year high of 200,500 CNY per tonne, then eased back to around 145,000 CNY per tonne.

Why it matters

The price of lithium carbonate is one of the primary cost drivers for Battery Energy Storage Systems (BESS). As raw material costs fluctuate, so does the economics of BESS procurement — making real-time market awareness a strategic advantage for project developers and EPCs.

Jun–Jul 2026 daily values are estimated from confirmed anchor points (Trading Economics, CEIC) and analyst forecasts. For market context only — not investment advice.

Sources: Trading Economics  ·  InfoLink / SMM

Management Team

Moritz Klinkisch, Geschäftsführer mellon.energy

Moritz Klinkisch

Managing Director

Sales & Business Development

LinkedIn
Laura Peschke, Geschäftsführerin mellon.energy

Laura Peschke

Managing Director

Marketing & PR

LinkedIn
Contact

Talk to us about
your BESS project

no-obligation consultation. Whether you're procuring hardware for your first project or scaling a pipeline — we're here to help.

Phone

+49 89 24414745-0

Confidential

Your project details stay private

Email

info@mellon.energy

Request a free consultation

Tell us about your project and we'll be in touch.