JouleBridge
JouleBridge is the active company. It is a signed edge runtime for energy sites, focused on command evidence, meter truth, policy gates, and audit trails that survive scale.
This is a design paper. The block below separates what is built from what is not, so the architecture reads against a known maturity.
- Bridge Kernel runtime in Rust with Ed25519 signing and SHA-256 hash chain
- Canonicalizer + append-only SQLite WAL ledger
- Modbus, OCPP, HTTP/MQTT adapters
- Policy gate evaluating signed rule bundles
- JSON evidence pack export
- Hardware key storage (TPM/HSM) in production
- DLMS/COSEM, DNP3, IEC 61850, SunSpec, IEEE 2030.5 adapters
- Production deployment on a paying site
- PDF evidence-pack summaries
JouleBridge is the active company. This paper documents the design and the part that exists so a reader can evaluate the architecture independent of deployment.
30 years of AT&C losses, told as one long engineering bug report
India has spent three decades trying to reduce power distribution losses. The number moved, but the deeper bug stayed: the sector still lacks a trusted record at the meter.
Canonical bytes: why JSON betrays you when you try to hash it
A signature only means something if every verifier can reproduce the exact bytes that were signed. JSON makes that harder than it looks.
India needs 1.32 million chargers by 2030. The grid doesn't know yet.
India is at 29,000 public chargers. The 2030 target is 1.32 million. Everyone is debating where the boxes go. The harder problem is whether the grid can prove what they did.
JouleBridge: A Signed Edge Runtime for Energy Sites
JouleBridge runs on a small gateway at the site. It signs every read and command at the source. Operators get proof packs for billing, execution, and dispute workflows. Here's the architecture, what's built, and what isn't.
Why JouleBridge now: smart meters, EV charging, and AI agents converging
Three infrastructure curves are moving faster than the evidence layer underneath them: 250M smart meters under RDSS, 1.32M EV chargers by 2030, and a $58B AI-energy-ops market. JouleBridge is the layer that makes the three coherent.