{ "protocol": { "name": "CVP", "version": "1.0.0-proposed", "revision": "2026-09-13", "spec_sha256": "f62725968356c92930531cd6085db76e216da06e95be53d636b0d2cf3218b148", "spec": "https://www.calculatorx.com/developers/cvp/spec/1.0" }, "document_status": "proposed", "calculator": { "id": "battery-pack-sizing", "version": "1.2.0", "title": "Battery Pack Sizing Calculator", "formula_family": "inverse-runtime-ah", "capability_id": "electrical.battery.pack_sizing", "verification_revision": "2026-09-12.round-xcal-iface", "related_capability": { "capability_id": "electrical.battery_runtime", "version": "1.2.0", "relation": "inverse" } }, "profile": "engineering", "status": "VERIFIED", "verification_status": "VERIFIED", "production_freshness": "CURRENT", "overall_trust": "VERIFIED", "runner": { "name": "cvp-runner", "version": "1.0.0" }, "environment": { "runtime": "node", "runtime_version": "22.23.2", "numeric_model": "IEEE-754 binary64", "os": "linux" }, "suite": { "id": "battery-pack-sizing", "version": "1.2.0", "uri": "https://www.calculatorx.com/evidence/electrical.battery.pack_sizing/1.2.0.json", "verification_revision": "2026-09-12.round-xcal-iface" }, "obligation_set": [ "CVP-PROV-01", "CVP-MODEL-01", "CVP-SCOPE-01", "CVP-UNIT-01", "CVP-REF-01", "CVP-GOLD-01", "CVP-BND-01", "CVP-INV-01", "CVP-NUM-01", "CVP-COV-01", "CVP-CONTRACT-01", "CVP-DEP-01", "CVP-ART-01", "CVP-PROD-01", "CVP-DIM-01", "CVP-PROP-01", "CVP-ROUND-01", "CVP-XCAL-01", "CVP-IFACE-01" ], "provenance": { "mode": "derived", "sources": [ { "label": "IEC 60050 — International Electrotechnical Vocabulary", "kind": "standard", "reference": "Electric battery capacity and related quantities" }, { "label": "Victron Energy — Battery capacity and Peukert exponent", "kind": "other", "reference": "SmartShunt / battery monitor documentation", "url": "https://www.victronenergy.com/media/pg/SmartShunt/en/battery-capacity-and-peukert-exponent.html" }, { "label": "CalculatorX Battery Runtime capability", "kind": "other", "reference": "Constant-load watts/amps model (1.2+) — internal method dependency" } ], "derivation": { "description": "Inverse of the published battery-runtime constant-load watts/amps model.", "upstream": [ { "id": "electrical.battery_runtime", "version": "1.2.0", "relation": "inverse" } ] } }, "reference": { "items": [ { "class": "O1", "reference_scope": "model", "scope": "model", "label": "Inverse of published battery runtime sizing" }, { "class": "O2", "reference_scope": "expected_values", "scope": "expected_values", "label": "Separate-module battery-pack-sizing oracle — same V8 binary64 as IUT", "engine": { "name": "battery-pack-sizing-reference", "precision_bits": 53, "independent_of_iut": true } }, { "class": "O2", "reference_scope": "numerical_behavior", "scope": "numerical_behavior", "label": "Same O2 module backs ≤2 ULP capacity_Ah comparison vs IUT", "engine": { "name": "battery-pack-sizing-reference", "precision_bits": 53, "independent_of_iut": true } } ], "notes": "Golden expected values use a separate O2 module (not IUT transcription). O2 shares Node/V8 binary64 with the IUT unless noted otherwise." }, "controls": { "CVP-PROV-01": { "result": "PASS", "applicability": "required", "notes": "Sources present on evidence" }, "CVP-MODEL-01": { "result": "PASS", "applicability": "required", "notes": "Ah from target runtime (watts/amps); optional ceil cell packing" }, "CVP-SCOPE-01": { "result": "PASS", "applicability": "required", "notes": "Planning estimate — not BMS / chemistry pack design" }, "CVP-UNIT-01": { "result": "PASS", "applicability": "required", "notes": "Ah, V, W, A, hours; DoD/η fractions" }, "CVP-REF-01": { "result": "PASS", "applicability": "required", "notes": "O1 model + O2 expected_values + O2 numerical_behavior" }, "CVP-GOLD-01": { "result": "PASS", "applicability": "required", "notes": "3/3 legacy golden; 3/3 oracle-backed numeric" }, "CVP-BND-01": { "result": "PASS", "applicability": "required", "notes": "16/16 CVP boundary · 17/17 legacy Evidence boundary" }, "CVP-INV-01": { "result": "PASS", "applicability": "required", "notes": "14 invalid-domain cases" }, "CVP-NUM-01": { "result": "PASS", "applicability": "required", "notes": "max_error_observed_ulp=1; policy declared a priori" }, "CVP-COV-01": { "result": "PASS", "applicability": "required", "notes": "4/4 declared partitions (watts, amps, cells, invalid-domain) · 3 legacy golden / 16 CVP boundary unique cases · 14 Evidence invalid-input (may overlap boundary)" }, "CVP-CONTRACT-01": { "result": "PASS", "applicability": "required", "notes": "4/4 CVP contract" }, "CVP-DEP-01": { "result": "PASS", "applicability": "required", "notes": "engine battery-pack-sizing; Node binary64" }, "CVP-ART-01": { "result": "PASS", "applicability": "required", "notes": "release_integrity.status=verified · digests: artifact_evidence_sha256=Evidence core (Trust freshness) · cvp_evidence_digest=artifacts.evidence_digest (fingerprint v2) · evidence_bundle_sha256=legacy Evidence JSON bytes · evidence_catalog_digest=attested_catalog_sha256 · production_sha256=bound production report · see artifacts.digest_registry" }, "CVP-PROD-01": { "result": "PASS", "applicability": "required", "notes": "this calculator CURRENT · bound snapshot pass @ 2026-09-13T11:35:00.166Z · live site-wide report stale @ 2026-09-13T11:35:03.375Z (8 other capabilities) · local checks pass · attestation_id=c4df4bb073bf87955dccfbc9399f558b5ac157599dcc2ffa7f03224ca402fd8f · This calculator CURRENT · This calculator is not affected · Bound attestation PASS @ 2026-09-13T11:35:00.166Z · Current site report STALE (8 capabilities; 148 remain CURRENT) @ 2026-09-13T11:35:03.375Z · Public schema 1.2.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓ · schema_const=1.2.0 · report output-const=pass · evidence-sha256=pass · semantic-contract=pass · capability-html-public-origin-agree=pass · cvp-manifest-public-origin-agree=pass · cvp-latest-alias-agrees=pass · cvp-immutable-manifest-fetch=pass · cvp-immutable-manifest-sha256=pass · cvp-latest-alias-matches-immutable=pass · calculator-html-cvp-projection=pass · evidence-html-cvp-projection=pass · attested_evidence_sha256=d8679f20af3506f0d939fc41f759265265a940cac3effc1332876304e1ad2bc0 · verified_at=2026-09-12T13:46:41.554Z · evidence_attested_at=2026-09-12T13:46:41.554Z · last_confirmed_current_at=2026-09-13T11:35:00.166Z · rendered_at=2026-09-13T11:35:03.430Z · binds=cvp_core_sha256", "check_result": "PASS", "production_state": "CURRENT", "binding_current": true }, "CVP-DIM-01": { "result": "PASS", "applicability": "applicable", "notes": "Energy / voltage → ampere-hours" }, "CVP-PROP-01": { "result": "PASS", "applicability": "applicable", "notes": "7/7 property" }, "CVP-META-01": { "result": "SKIP", "applicability": "not_applicable", "notes": "No input→output transformation vectors in pack — control not in obligation set" }, "CVP-ROUND-01": { "result": "PASS", "applicability": "applicable", "notes": "2/2 round-trips" }, "CVP-XCAL-01": { "result": "PASS", "applicability": "applicable", "notes": "2/2 cross-calculator · xcal-inverse-runtime-watts PASS vs electrical.battery_runtime; xcal-inverse-runtime-amps PASS vs electrical.battery_runtime" }, "CVP-IFACE-01": { "result": "PASS", "applicability": "applicable", "notes": "UI (SSR) · REST · MCP equivalent (MCP uses calc API handler). ui-ssr is query-result HTML, not a live browser session." }, "CVP-ORACLE-01": { "result": "SKIP", "applicability": "higher_assurance", "notes": "O2 present; O3 not required this wave" }, "CVP-EXP-01": { "result": "SKIP", "applicability": "optional", "notes": "expert_reviewed=false" } }, "tests": { "golden": { "passed": 3, "total": 3, "failed": 0, "case_ids": [ "g-watts", "g-cells", "g-amps" ] }, "boundary": { "passed": 16, "total": 16, "failed": 0, "case_ids": [ "cell-half", "missing-t", "nonintegral-series", "boundary-10Ah", "boundary-cells", "boundary-cell-capacity-only", "boundary-dod-over-one", "boundary-eta-zero", "boundary-t-zero", "boundary-V-zero", "boundary-P-zero", "boundary-I-zero", "boundary-dod-zero", "boundary-eta-over-one", "boundary-watts-missing-P", "boundary-amps-missing-I" ] }, "invalid": { "passed": 14, "total": 14, "failed": 0, "case_ids": [ "cell-half", "missing-t", "boundary-cell-capacity-only", "boundary-invalid-mode", "boundary-dod-over-one", "boundary-eta-zero", "boundary-t-zero", "boundary-V-zero", "boundary-P-zero", "boundary-I-zero", "boundary-dod-zero", "boundary-eta-over-one", "boundary-watts-missing-P", "boundary-amps-missing-I" ] }, "property": { "passed": 7, "total": 7, "failed": 0, "case_ids": [ "property-ah", "property-load", "property-cells", "property-amps-eta-ignored", "property-pack-voltage-differs", "property-roundtrip-runtime-watts", "property-roundtrip-runtime-amps" ], "kind": "fixed" }, "round_trip": { "passed": 2, "total": 2, "failed": 0, "case_ids": [ "roundtrip-runtime-watts", "roundtrip-runtime-amps" ] }, "metamorphic": { "passed": 0, "total": 0, "failed": 0, "case_ids": [] }, "contract": { "passed": 4, "total": 4, "failed": 0 }, "cross_interface": { "passed": 3, "total": 3, "failed": 0, "case_ids": [ "iface-watts", "iface-amps", "iface-cells" ] }, "cross_calculator": { "passed": 2, "total": 2, "failed": 0, "case_ids": [ "xcal-inverse-runtime-watts", "xcal-inverse-runtime-amps" ] } }, "coverage": { "partitions": [ { "id": "watts", "description": "Watts sizing", "exercised": true, "case_count": 9 }, { "id": "amps", "description": "Amps sizing", "exercised": true, "case_count": 6 }, { "id": "cells", "description": "Cell packing", "exercised": true, "case_count": 4 }, { "id": "invalid-domain", "description": "Invalid inputs", "exercised": true, "case_count": 14 } ] }, "numerical": { "representation": "IEEE-754 binary64", "tolerance": { "type": "ulp", "value": 2, "rationale": "Inverse Ah sizing; ≤2 ULP vs separate-module O2 (same V8). Declared a priori.", "declared_before_evaluation": true }, "max_error_observed": 1, "records": [ { "id": "g-watts", "reference": { "mode": "watts", "capacity_Ah": 10, "E_Wh": 120, "t_h": 6, "V": 12, "dod": 1, "eta": 1, "P_W": 20, "I_A": null }, "actual": { "mode": "watts", "capacity_Ah": 10, "E_Wh": 120, "t_h": 6, "V": 12, "dod": 1, "eta": 1, "P_W": 20, "I_A": null }, "error_ulp": 0, "threshold_ulp": 2, "suite": "golden" }, { "id": "g-cells", "reference": { "mode": "watts", "capacity_Ah": 10, "E_Wh": 148, "t_h": 5, "V": 14.8, "dod": 1, "eta": 1, "P_W": 29.6, "I_A": null, "n_s": 4, "n_p": 4, "n_cells": 16, "V_pack": 14.8, "V_cell": 3.7, "capacity_cell_Ah": 2.5 }, "actual": { "mode": "watts", "capacity_Ah": 10, "E_Wh": 148, "t_h": 5, "V": 14.8, "dod": 1, "eta": 1, "P_W": 29.6, "I_A": null, "V_cell": 3.7, "capacity_cell_Ah": 2.5, "n_s": 4, "n_p": 4, "n_cells": 16, "V_pack": 14.8, "capacity_pack_Ah": 10 }, "error_ulp": 0, "threshold_ulp": 2, "suite": "golden" }, { "id": "g-amps", "reference": { "mode": "amps", "capacity_Ah": 10, "E_Wh": 96, "t_h": 4, "V": 12, "dod": 0.8, "eta": 1, "P_W": null, "I_A": 2, "warnings": [ { "code": "ETA_IGNORED_IN_AMPS_MODE", "severity": "info" } ] }, "actual": { "mode": "amps", "capacity_Ah": 10, "E_Wh": 96, "t_h": 4, "V": 12, "dod": 0.8, "eta": 1, "P_W": null, "I_A": 2, "warnings": [ { "code": "ETA_IGNORED_IN_AMPS_MODE", "severity": "info", "detail": "Amps mode treats I_A as battery-side discharge current; η does not enter capacity sizing (aligned with electrical.battery_runtime).", "suggestion": "Use watts mode with load-side P_W when applying system efficiency η." } ] }, "error_ulp": 0, "threshold_ulp": 2, "suite": "golden" }, { "id": "roundtrip-runtime-watts", "reference": { "mode": "watts", "capacity_Ah": 13.888888888888886, "E_Wh": 119.99999999999999, "t_h": 6, "V": 12, "dod": 0.8, "eta": 0.9, "P_W": 20, "I_A": null }, "actual": { "mode": "watts", "capacity_Ah": 13.888888888888886, "E_Wh": 119.99999999999999, "t_h": 6, "V": 12, "dod": 0.8, "eta": 0.9, "P_W": 20, "I_A": null }, "error_ulp": 1, "threshold_ulp": 2, "suite": "round-trip", "hops": { "forward": { "reference": { "mode": "watts", "capacity_Ah": 13.888888888888886, "E_Wh": 119.99999999999999, "t_h": 6, "V": 12, "dod": 0.8, "eta": 0.9, "P_W": 20, "I_A": null }, "actual": { "mode": "watts", "capacity_Ah": 13.888888888888886, "E_Wh": 119.99999999999999, "t_h": 6, "V": 12, "dod": 0.8, "eta": 0.9, "P_W": 20, "I_A": null }, "error_ulp": 0 }, "reverse": { "reference": 6, "actual": { "t_h": 5.999999999999999, "t_d": 0.24999999999999997, "E_Wh": 119.99999999999999 }, "error_ulp": 1 } } }, { "id": "roundtrip-runtime-amps", "reference": { "mode": "amps", "capacity_Ah": 10, "E_Wh": 96, "t_h": 4, "V": 12, "dod": 0.8, "eta": 1, "P_W": null, "I_A": 2 }, "actual": { "mode": "amps", "capacity_Ah": 10, "E_Wh": 96, "t_h": 4, "V": 12, "dod": 0.8, "eta": 1, "P_W": null, "I_A": 2 }, "error_ulp": 0, "threshold_ulp": 2, "suite": "round-trip", "hops": { "forward": { "reference": { "mode": "amps", "capacity_Ah": 10, "E_Wh": 96, "t_h": 4, "V": 12, "dod": 0.8, "eta": 1, "P_W": null, "I_A": 2 }, "actual": { "mode": "amps", "capacity_Ah": 10, "E_Wh": 96, "t_h": 4, "V": 12, "dod": 0.8, "eta": 1, "P_W": null, "I_A": 2 }, "error_ulp": 0 }, "reverse": { "reference": 4, "actual": { "t_h": 4, "t_d": 0.16666666666666666, "E_Wh": 96 }, "error_ulp": 0 } } } ] }, "interfaces": { "compared": [ "ui-ssr", "rest", "mcp" ], "result": "PASS", "notes": "UI (SSR) · REST · MCP equivalent (MCP uses calc API handler). ui-ssr is query-result HTML, not a live browser session." }, "artifacts": { "evidence_bundle_sha256": "87f070d3c4d88cf6d24c5e34589eb7210c60a7d09686d10c86fc6f4a90dd9305", "evidence_digest": "1e3949ba3d8eef53dc1bcb411d74ee597fb40665e819598191df5db2e5d75e36", "production_sha256": "d8679f20af3506f0d939fc41f759265265a940cac3effc1332876304e1ad2bc0", "attested_catalog_sha256": "dfd311ad9f2e37be7af2a29197a84f33944dff9549828dd83635a5da35985df4", "production_checks": [ { "id": "electrical.battery.pack_sizing:output-const", "status": "pass", "detail": "output const 1.2.0 vs capability 1.2.0", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-12T13:46:41.554Z" }, { "id": "electrical.battery.pack_sizing:evidence-sha256", "status": "pass", "detail": "2cd4cdf43c88", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-12T13:46:41.554Z" }, { "id": "electrical.battery.pack_sizing:semantic-contract", "status": "pass", "detail": "27/27", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-12T13:46:41.554Z" }, { "id": "electrical.battery.pack_sizing:capability-html-public-origin-agree", "status": "pass", "detail": "public 1.2.0 vs origin 1.2.0", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-12T13:46:41.554Z" }, { "id": "electrical.battery.pack_sizing:cvp-manifest-public-origin-agree", "status": "pass", "detail": "electrical.battery.pack_sizing/1.2.0/2026-09-12.round-xcal-iface/engineering/1e3949ba3d8e", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-12T13:46:41.554Z", "projection_compared": false }, { "id": "electrical.battery.pack_sizing:cvp-latest-alias-agrees", "status": "pass", "detail": "electrical.battery.pack_sizing/1.2.0/2026-09-12.round-xcal-iface/engineering/1e3949ba3d8e", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-12T13:46:41.554Z", "projection_compared": false }, { "id": "electrical.battery.pack_sizing:cvp-immutable-manifest-fetch", "status": "pass", "detail": "public=200 origin=200", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-12T13:46:41.554Z" }, { "id": "electrical.battery.pack_sizing:cvp-immutable-manifest-sha256", "status": "pass", "detail": "1e3949ba3d8e", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-12T13:46:41.554Z" }, { "id": "electrical.battery.pack_sizing:cvp-latest-alias-matches-immutable", "status": "pass", "detail": "electrical.battery.pack_sizing/1.2.0/2026-09-12.round-xcal-iface/engineering/1e3949ba3d8e", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-12T13:46:41.554Z", "projection_compared": false }, { "id": "electrical.battery.pack_sizing:calculator-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-12T13:46:41.554Z" }, { "id": "electrical.battery.pack_sizing:evidence-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-12T13:46:41.554Z" } ], "digest_registry": { "digest_algorithm": "sha256", "canonicalization": "json-sorted-keys-utf8", "entries": [ { "name": "cvp_core_sha256", "field": "artifacts.cvp_core_sha256", "digest_scope": "cvp_verification_fingerprint_v2", "value": "1e3949ba3d8eef53dc1bcb411d74ee597fb40665e819598191df5db2e5d75e36", "note": "Immutable verification core; excludes attestation/live-status and Evidence contract counts" }, { "name": "cvp_evidence_digest", "field": "artifacts.evidence_digest", "digest_scope": "cvp_verification_fingerprint_v2", "value": "1e3949ba3d8eef53dc1bcb411d74ee597fb40665e819598191df5db2e5d75e36", "note": "Alias of cvp_core_sha256 (historical field name)" }, { "name": "artifact_evidence_sha256", "field": "release_integrity.digests.evidence_core_sha256", "digest_scope": "evidence_artifact_core", "value": "2cd4cdf43c88edce1db99d00d2ebe5d3d15279c9eb4d1cdce25d83a182453c73", "note": "Published Evidence JSON core — Trust freshness / production bind subject" }, { "name": "evidence_catalog_digest", "field": "artifacts.attested_catalog_sha256", "digest_scope": "capability_catalog", "value": "dfd311ad9f2e37be7af2a29197a84f33944dff9549828dd83635a5da35985df4", "note": "Capability catalog integrity; site-wide, not per-suite fingerprint" } ] }, "cvp_core_sha256": "1e3949ba3d8eef53dc1bcb411d74ee597fb40665e819598191df5db2e5d75e36" }, "dependencies": [ { "name": "battery-pack-sizing-engine", "version": "1.2.0" }, { "name": "battery-pack-sizing-reference-oracle", "version": "1.0.0" }, { "name": "electrical.battery_runtime", "version": "1.2.1", "role": "cross_calculator_peer", "capability_id": "electrical.battery_runtime", "evidence_digest": "058cf03cbe19c130215959ef33f3997a5e741d81646c35f5668c8b960ddb94ea", "evidence": "https://www.calculatorx.com/evidence/electrical.battery_runtime/1.2.1.cvp.json" }, { "name": "node", "version": "22.23.2" } ], "attestation": { "status": "CURRENT", "href": "/.well-known/calculatorx-production-attestation.json", "id": "c4df4bb073bf87955dccfbc9399f558b5ac157599dcc2ffa7f03224ca402fd8f", "attested_at": "2026-09-12T13:46:41.554Z", "last_confirmed_current_at": "2026-09-13T11:35:00.166Z", "site_attestation_current": false, "capability_attestation_current": true, "bound_snapshot_status": "pass", "live_report_status": "stale", "bound_attested_at": "2026-09-13T11:35:00.166Z", "live_updated_at": "2026-09-13T11:35:03.375Z", "bound_snapshot": { "status": "pass", "attested_at": "2026-09-13T11:35:00.166Z", "site_stale_count": 8 }, "live_site_status": { "href": "/.well-known/calculatorx-production-attestation.json" }, "bound_snapshot_site_stale_count": 8, "site_stale_capability_count": 8, "evidence_attested_at": "2026-09-12T13:46:41.554Z" }, "domain_review": { "status": "ABSENT", "spec_version": "1.2.0", "external_third_party": false }, "internal_review": { "status": "PASS", "reviewer_role": "electrical-engineer", "reviewed_by": "CalculatorX electrical review", "spec_version": "1.2.0", "independence": "internal", "external_third_party": false }, "timestamps": { "verified_at": "2026-09-12T13:46:41.554Z", "generated_at": "2026-09-12T13:46:41.554Z", "rendered_at": "2026-09-13T11:35:03.430Z", "notes": "verified_at/generated_at mark the first publication of this cvp_core_sha256 (artifacts.evidence_digest alias) for suite verification. evidence_attested_at/attested_at is the first production bind of that core digest. last_confirmed_current_at is the latest site-wide report that still confirms CURRENT. rendered_at is this JSON serialization and is not part of cvp_core_sha256 / evidence_digest. Production attestation binds cvp_core_sha256 (binds evidence_digest). Causal order: verified_at ≤ evidence_attested_at ≤ last_confirmed_current_at. attestation.bound_snapshot.site_stale_count is the site-wide stale capability count at Manifest bind time — not a live value. Fetch attestation.live_site_status.href for the current site report." }, "links": { "legacy_evidence": "https://www.calculatorx.com/evidence/electrical.battery.pack_sizing/1.2.0.json", "evidence_page": "https://www.calculatorx.com/evidence/electrical.battery.pack_sizing/1.2.0", "calculator": "https://www.calculatorx.com/calc/electric/battery-pack-sizing", "schema": "https://www.calculatorx.com/developers/cvp/schema/cvp-evidence-1.0.json", "protocol": "https://www.calculatorx.com/developers/cvp/spec/1.0", "manifest": "https://www.calculatorx.com/evidence/electrical.battery.pack_sizing/1.2.0.cvp.json", "manifest_immutable": "https://www.calculatorx.com/evidence/electrical.battery.pack_sizing/1.2.0/2026-09-12.round-xcal-iface.cvp.json", "manifest_core": "https://www.calculatorx.com/evidence/electrical.battery.pack_sizing/1.2.0/2026-09-12.round-xcal-iface.1e3949ba3d8e.cvp.json" } }