Bridging the Power Gap
Retrofitting and Future-Proofing Data Centers for the AI Era for Mixed-Density workloads.
View the App NoteGPU Demand
GPU demand is outpacing greenfield data center construction, which can take years to complete.
Brownfield Sites
Many existing facilities operate below 50% capacity with robust physical infrastructure already in place.
Modular In-Rack
Solve two distinct challenges with one scalable platform: retrofit legacy sites and future-proof new builds.
Scenario 1: The Retrofit
Scenario 2 ↓Immediate AI Deployment in Existing Facilities
- Scenario: 10–15 year old facilities designed for standard CPU servers.
- The Upgrade: Install 51Vdc output HPR power shelves in the upper portion of the rack to support new high-density GPU platforms.
- Legacy Support: Keep existing CPU servers running in the bottom of the rack.
- The Bridge: The Pii PF-2662-P2xN inverter shelf pulls from the new 51Vdc GPU bus to provide 240Vac single-phase power.
- Result: A single hybrid rack powering both 51Vdc AI workloads and legacy 240Vac CPU servers.
Scenario 2: Future-Proofing
Initial CPU Installation with Scalable Infrastructure
- Objective: Install more readily available CPU servers today using a scalable 3-phase infrastructure.
- Configuration: Bring 3-phase power (480Y/277V or 415Y/240V) directly to the rack.
- Current Load: Power standard CPU servers from a single phase of the 3-phase feed (277Vac or 240Vac).
- Distribution: Standard rack PDUs distribute AC power to the server power supplies.
- State: The rack is highly efficient for current compute needs but physically prepared for an AI expansion.
The 51Vdc GPU Expansion
- Objective: Transition to GPUs without a rip-and-replace of the power infrastructure.
- The Expansion: Redirect the existing 3-phase AC feed into new High Power Rectifier (HPR) shelves.
- Native DC: The HPR shelves generate the 51Vdc bus required for new GPU servers.
- PDU Reuse: Previously installed rack PDUs are unplugged from the upstream busway and plugged into the Pii Inverter Shelf.
- The Bridge: The inverter converts 51Vdc back to 240Vac single-phase for original CPU servers, allowing them to remain operational.
Pii PF-2662-P2xN Inverter Shelf
Connecting 51Vdc Environments with 240Vac Hardware
Core Purpose
Seamlessly links advanced 51Vdc architectures with traditional 240Vac single-phase gear.
Power Specs
Draws 51Vdc from the main high-power bus and cleanly outputs 240Vac Single Phase.
System Match
Built to work perfectly with the common redundant power supplies utilized by top-tier server manufacturers.
Scalable Edge
Expand your AI capabilities as needed without triggering massive, facility-wide electrical redesigns.
Strategic Value
Speed to Market
Deploy AI capacity in existing space in weeks, not years.
Capital Efficiency
Reuse existing 3-phase drops, rack PDUs, and functional CPU servers.
Operational Continuity
Upgrade or expand power architectures with minimal disruption to existing legacy compute.
Sustainability
Leverage existing assets carbon footprint by optimizing and extending the life of current digital infrastructure.
Next Steps
Let’s review your specific rack densities and power schedules to find the right configuration for your facility.
