DurationX
MethodologySample briefVerify a reportRequest audit

Before you commit millions to long-duration storage,
find out if the assumptions are CAPEX-ready.

DurationX is the validation layer for long-duration energy-storage investment assumptions — a vendor-independent, pre-CAPEX readiness audit. It identifies weak duration, CAPEX, technology-class, and reliability assumptions before vendor selection.

Request CAPEX Readiness AuditSee Sample Decision Brief

No vendor commissions. No supplier ranking. No procurement advice. Assumption audit only.

Why this can be trusted

Deterministic scoring
For a pinned intake, dataset, rubric, rules, and normalization inputs, the numeric scoring calculation is deterministic.
Human-reviewed before release
Before release, a person checks the report for input-to-output consistency, source/provenance display, prohibited claims, unresolved compliance flags, calculation reconciliation, and document integrity.
Vendor-independent
DurationX does not sell storage systems, rank vendors, accept supplier referral fees, or receive commissions from technology suppliers.
Independently verifiable
Every report is Ed25519-signed and re-hashed on demand — check any report’s authenticity yourself.
Verify a report →

What you receive

Every audit produces a single reviewed decision brief, delivered by 18:00 CET/CEST on the third business day after complete intake acceptance. One project. One location. Up to five scenarios.

CAPEX Readiness Score
A 0–100 score for how strong the current decision setup is, with a four-band outcome label.
Assumption Failure Map
Top three assumption weaknesses, each with why it is weak and how much readiness it costs.
Scenario Intelligence
Up to five scenario comparisons — duration alternatives, technology-class alternatives — plus a CAPEX stability check against your own declared low/base/high range.
Technology-Class Signal
Which technology class appears stronger under the current assumptions, without naming vendors.
Investment Committee Memo
One-page decision-language memo the team can bring to the next diligence step.

Vendor-independent by design

DurationX does not sell storage systems, rank vendors, broker procurement, or receive supplier commissions. Findings describe assumption readiness only. Decisions remain the responsibility of the customer and its advisors.

Methodology and sources

The scoring rubric compares customer-provided assumptions against a versioned public benchmark set drawn from PNNL grid energy storage cost and performance databases, NREL Annual Technology Baseline, and DOE public reports. Every report footer cites the exact dataset, rubric, prompt, and template versions used, plus a verification reference for independent authenticity checks.

Read the methodology →Verify a report →

How it works

  1. 01Qualification. Short fit form. A reviewer confirms scope within one to two business days.
  2. 02Payment. $1,000 fixed. Paddle handles billing.
  3. 03Intake. Structured project details. The SLA clock starts only after intake acceptance.
  4. 04Analysis. Deterministic scoring against the versioned benchmark, then narrative review.
  5. 05Human review. Every report is manually quality-checked before release.
  6. 06Delivery. Reviewed decision brief, verifiable via /verify.
  7. 07After delivery. Close the required inputs and re-audit the same project as its evidence matures, or bring the next project. Each audit covers one project, one location — by design.