Solution · P1
Commercial Buildings
Rooftop PV, battery, AC charging, grid-interactive, BTM energy.
- 250–500 kW
- Typical capacity
- Building owner / facilities manager
- Primary buyer
- P1
- Priority tier
- Projected / Targeting
- Outcome confidence
The problem
Why this matters
Buyer pain first — architecture second. If the problem is not real, the stack is irrelevant.
Demand charges and peak tariffs punish C&I buildings without storage and smart dispatch.
Buyer jobs
- · Cut peak demand charges with storage and dispatch
- · Add rooftop PV and charging without siloed controllers
Demand charges and peak tariffs punish C&I buildings without storage and smart dispatch.
Architecture notes
- · Shared bus for PV, BESS, and charging endpoints
- · EMS tariff optimisation as design-target software surface
Architecture
How Joule Junction addresses it
Deployment scale 250–500 kW. The solution traverses these energy-flow stages on the open DC platform.
Energy-flow path
Platform
Three layers. One stack.
Every solution runs on DC BUS, Metering, and Energy Management — the same open architecture at every scale.
DC BUS
The physical DC backbone. SST, BusWay, PCS, protection, and grid interface in one architecture — current flagship 800 V DC.
- Solid State Transformer (SST)
- DC BusWay
- Power Conversion System (PCS)
Metering
IEEE 2030.5-native data layer. Measurement at every point — grid edge, DC bus, load, charger.
- IEEE 2030.5 Smart Meters
- DC Energy Meters
- Sensors & Data Acquisition
Energy Management
Software that optimizes. The layer customers evaluate first.
- Forecasting
- Tariff optimisation
- Battery optimisation
Connected systems
What integrates on the bus
Systems designed to sit on the DC BUS for this solution.
Storage
BESS 50 kW – 5 MW, LFP, Na+, BMS. Modular architecture to utility-scale deployments.
Learn more →
Solar
PV — rooftops, carport, fixed-tilt, single-axis. C&I scale.
Learn more →
DC Charging Infrastructure
DC BusWay, PCS, SST, Protection — the DC backbone for CCS, MCS, and V2X charging (ISO 15118-2/20).
Learn more →Products
Platform building blocks
Hardware that shares energy-flow stages with this solution.
Solid State Transformer
MV AC → 800V DC in one step. No 50 Hz transformer.
Product →800V DC BusWay
The physical backbone. Plug-in DC distribution.
Product →Power Conversion System
Bidirectional AC ↔ DC conversion. Grid-forming capable.
Product →DC Meter
IEEE 2030.5-native measurement on the DC bus.
Product →Commercial outcome
What you are targeting
Outcomes below are design-target projections unless marked measured or customer-reported.
Projected / Targeting
Peak shaving via BESS + tariff optimisation.
More solutions
Related buyer paths
Grid Capacity
BESS + PCS + EMS orchestration to unlock capacity behind constrained grid connections.
Learn more →P0Fleet Charging
BESS + 800V DC BUS. All DC output voltages. Dynamic load management. V2G.
Learn more →P0Edge Data Centres
Compact 800V DC architecture for distributed edge deployments.
Learn more →Evaluating commercial buildings for your project?
Talk with Joule Junction about site capacity, load profile, and architecture fit — platform first, products second.