Solutions · Micro-grid
DC Micro-grid Solutions
Solid-state transformer-based power solutions for diverse DC power sources and loads.
An SST-based microgrid converts medium-voltage AC directly into an 800 VDC bus, eliminating multiple AC/DC conversion stages. This improves overall efficiency and enables flexible power sharing among solar generation, energy storage, AI data centers and EV chargers.
Solid-state transformer micro-grid diagram: grid, solar array and containerised battery energy storage on the source side, an Arete solid-state transformer converting medium-voltage AC to a shared 800 V DC busbar, and an AI data center rack and EV charging station as loads, with bidirectional flow on storage and charging.
Source side
Load side
Arete builds the power-conversion platform microgrids run on
Our microgrid SST connects directly to the medium-voltage AC grid and converts power into a regulated 800 VDC bus. Together with our high-efficiency, application-specific DC/DC converter modules for EV charging, energy storage, and solar generation, it forms an integrated power-conversion platform that enables more efficient, flexible, and intelligent microgrid operation.
Products
In development
Solid-State Transformer (SST)
Connects directly to the 6.6–13.8 kV or 22–35 kV medium-voltage grid, supporting bidirectional energy flow between medium voltage and 800 V DC. Photovoltaic and energy-storage assets are interfaced to the SST via DC-DC converters. By eliminating the conventional line-frequency transformer and intermediate low-voltage AC distribution stages, the SST establishes a shorter, fully controllable power path between the utility grid, local DC resources and the microgrid, delivering higher power density and a reduced equipment footprint.
- Input voltage options: 6.6–13.8 kVAC or 22–35 kVAC
- Available in 3.15 MW and 7.2 MW configurations
- Peak efficiency of over 98.5%
- Regulated 800 VDC output with ±1% voltage accuracy and no more than ±0.5% ripple
- Configurable battery storage capacity for the required backup duration
- Configurable N+X modular power-cell redundancy
- Optimized DC droop control for autonomous current sharing among parallel units
In development
DC/DC with Energy Storage system
A bidirectional buck-boost DC/DC converter that turns a wide-range DC input into a regulated DC output through both buck and boost modes. In energy-storage applications, the module achieves cluster-level state-of-charge balancing. It also performs bidirectional charge and discharge conversion, decouples the battery voltage from the submodule capacitor voltage, and suppresses circulating currents among parallel clusters.
- Power density > 900 W/in³
- Conversion efficiency up to 99%
- Bidirectional energy flow
- Modular wide bandgap semiconductor (SiC/GaN) design
- Low on-resistance switching and low conduction loss
- Thermal options of forced air, cold plate, and immersion cooling
- Intelligent monitoring, event logging, and system communication