In development

Medium-voltage DC charging infrastructure

DC power
at grid scale.
Where it matters.

The DecaWatt Project is developing a next-generation MVDC microgrid platform for heavy transport, maritime, and data centre applications — built on solid-state transformer technology and designed for the demands of Nordic grid infrastructure.

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Technical overview · PDF · decawatt.tech

Core platform capabilities

01 / Platform
5 kV or 1,500 V DC backbone

Single-stage MV AC to DC conversion via cascaded H-bridge SST — no intermediate conversion losses. Scalable voltage selection matches the application: 5 kV for heavy transport and maritime, 1,500 V for EV charging and distribution. Direct CCS/MCS compatibility throughout.

02 / Protection
Sub-millisecond fault isolation

Solid-state circuit breakers with <1 ms trip time, IT earthing strategy, and bus sectionalisation for selective fault clearing without system-wide shutdown.

03 / Grid services
Integrated BESS revenue

LFP battery storage participates in Nordic TSO frequency reserve markets — FFR, FCR-N, FCR-D, aFRR — converting infrastructure into a revenue-generating grid asset.

Target system parameters

Sought — first deployment not yet confirmed

10MW
Target power capacity
20MWh
LFP battery storage
<1ms
SSCB fault trip time
2–4yr
Projected payback period

System configurations

5 kV DC — Heavy transport & maritime charging
20 – 100+ MW
Large-scale containerised charging for trucks and vessels, with direct-coupled solar and BESS
MV AC grid input SST CHB topology solid-state 5 kV DC bus Solar farm DC-coupled PV BESS LFP · 20 MWh Truck charging MCS / CCS · heavy transport Maritime / OPS vessel shore power · port charging
1.5 kV DC — EV charging hub
5 – 30 MW
Urban or depot EV charging with integrated renewables and Nordic grid services
MV AC grid input SST single-stage CHB 1.5 kV DC bus Solar farm DC-coupled PV BESS LFP storage EV charger A CCS2 & MCS · 150–1,500 kW per outlet EV charger B CCS2 & MCS · 150–1,500 kW per outlet EV charger C CCS2 & MCS · 150–1,500 kW per outlet
800 V DC — Data centre · Superscale
30 MW+
High-efficiency native DC distribution for hyperscale and edge data centres, eliminating AC/DC conversion stages
MV AC grid input SST DAB stage 800 V out 800 V DC bus Solar farm DC-coupled PV BESS LFP · UPS backup Server rack A native 800 V DC · high density Server rack B native 800 V DC · high density Server rack C native 800 V DC · high density
Open to the right partnership. The DecaWatt Project is at an advanced concept stage and is actively exploring strategic partnerships, licensing arrangements, and in-house integration with established players in power electronics, grid infrastructure, and heavy transport electrification.
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Project lead

MS
Mikko Summala
Founder · Infrastructure Developer

Mikko is an experienced infrastructure developer with a background spanning grid infrastructure, heavy transport electrification, and maritime power systems. The DecaWatt Project draws on deep domain expertise in solid-state transformer design, DC protection architecture, and Nordic grid services markets.

LinkedIn summala.com info@decawatt.tech