Energy, water and impact reporting you can audit line by line.
Ledger turns the Facility Graph and its telemetry into published-formula reports — PUE, WUE, energy per workload, economic impact — that boards, utilities and permitting bodies can verify.
| Stage | 04 · Prove |
|---|---|
| Reads | Facility Graph |
| Upstream | Aidni Conduit |
| Hands off to | Boards, utilities, regulators |
| Primary output | Quarterly energy and water report |
Why this system exists
- 01
Public debate about data centers often compares an industry to an individual, without the math. Operators lose that argument when they cannot show their own numbers.
- 02
Sustainability and impact figures are assembled by hand each quarter from systems that disagree, so they are slow to produce and hard to defend.
- 03
Regulators and utilities increasingly ask for energy and water disclosure as a condition of approval.
The mechanism, step by step.
One data model
Ledger reads the same graph Grid, Thermal and Conduit use, so a report and an operating decision never disagree about the facts.
Published formulas
Every metric ships with its formula and inputs. PUE is facility energy over IT energy; WUE is site water over IT energy; nothing is a black box.
Automated audit
Ledger flags meter gaps, unit mismatches and reconciliation breaks before a report goes out, not after a reviewer finds them.
Reports for each audience
Board summaries, utility filings, permitting packages and community fact sheets come from the same audited dataset.
Every number ships with its math.
These are the formulas Ledger uses. Each report lists the inputs and meters behind every value.
| Metric | Formula | Unit |
|---|---|---|
| PUE | Total facility energy ÷ IT equipment energy | ratio |
| WUE | Site water consumed ÷ IT equipment energy | L/kWh |
| Energy per GPU-hour | IT energy attributed to accelerators ÷ GPU-hours delivered | kWh |
| Stranded capacity | Energized IT capacity − (IT load + reserved redundancy) | MW |
| Delay cost | Compute capital ÷ useful life (months) × months idle | $ |
- Quarterly energy and water report
- Energy per workload and per GPU-hour
- Economic impact summary
- Audit trail per metric
- Utility and sub-meter data
- Water meters
- Facility Graph
- ESG and finance systems (export)
Disclosure as a by-product of operations. Instead of assembling sustainability figures by hand each quarter, Ledger generates them from the same model that runs the site, with formula and meter lineage behind every number.
Why this matters for the field →Bring us one site. We will show you its real capacity.
A six-week Site Assessment maps the power envelope, the cooling design and the compute plan for one facility, delivered by the engineers who build the platform.