← The evidence ledger
Evidence row 2201954
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://electrical-calc.x402tookit.com/battery-bank
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 10daa85ec44ddfb4288470a022bc7c1afdeda2a78659a9025b8384358fa76301
- Leaf
- 0x0fc6f07ccd94ca1f89184e6edf712f9b4096ddc6293b22333060fa7ceb2035da
What was observed
{
"endpoints": [
[
"x402",
"https://electrical-calc.x402tookit.com/battery-bank"
]
],
"name": "Electrical Calculators",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Battery bank layout (series and parallel counts) and runtime from load, voltage, Ah, depth of discharge and efficiency.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"batteryAh": 100,
"batteryVoltageV": 12,
"depthOfDischargePct": 50,
"efficiencyPct": 90,
"loadW": 500,
"runtimeHours": 5,
"systemVoltageV": 24
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-21T06:22:27.940Z",
"bankAh": 300,
"bankVoltageV": 24,
"bankWh": 7200,
"batteriesInSeries": 2,
"batteryDrawCurrentA": 23.14815,
"degraded": false,
"depthOfDischargePct": 50,
"dischargeRateC": 0.07716,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"efficiencyPct": 90,
"loadWattHoursNeeded": 2500,
"notChecked": [
"Peukert effect (high discharge rates reduce usable capacity)",
"temperature, ageing and charge-rate limits",
"…2 more"
],
"parallelStrings": 3,
"reasons": [
"Series count = 24 V / 12 V = 2; bank amp-hours = 100 x 3 parallel = 300 Ah at 24 V.",
"Runtime = bank Wh x depth of discharge x efficiency / load.",
"…1 more"
],
"runtimeHours": 6.48,
"runtimeMinutes": 388.8,
"source": "computed locally (Wh = V x Ah; usable = Wh x DoD; runtime = usable x efficiency / load)",
"summary": "2 in series x 3 parallel = 6 batteries (7200 Wh); runs 500 W for about 6.48 hours at 50% depth of discharge.",
"totalBatteries": 6,
"usableWh": 3600,
"usableWhPerString": 1200,
"verdict": "BANK_SIZED"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"batteryAh": {
"description": "Capacity of one battery in amp-hours at its rating",
"type": "number"
},
"batteryVoltageV": {
"description": "Nominal voltage of one battery in volts",
"type": "number"
},
"depthOfDischargePct": {
"description": "Usable fraction of capacity in percent (default 50; 80 typical for lithium)",
"type": "number"
},
"efficiencyPct": {
"description": "Inverter and wiring efficiency in percent (default 90; use 100 for a DC load)",
"type": "number"
},
"loadW": {
"description": "Constant load in watts",
"type": "number"
},
"parallelStrings": {
"description": "Parallel strings you have, to get the runtime (default 1; ignored if runtimeHours is sent)",
"type": "integer"
},
"runtimeHours": {
"description": "Target runtime in hours, to size the parallel strings",
"type": "number"
},
"systemVoltageV": {
"description": "Bank (DC system) voltage in volts, a whole multiple of batteryVoltageV",
"type": "number"
}
},
"required": [
"loadW",
"systemVoltageV",
"batteryVoltageV",
"batteryAh"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"bankAh": {
"type": [
"null",
"number"
]
},
"bankVoltageV": {
"type": [
"null",
"number"
]
},
"bankWh": {
"type": [
"null",
"number"
]
},
"batteriesInSeries": {
"type": [
"null",
"number"
]
},
"batteryDrawCurrentA": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"depthOfDischargePct": {
"type": [
"null",
"number"
]
},
"dischargeRateC": {
"type": [
"null",
"number"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"efficiencyPct": {
"type": [
"null",
"number"
]
},
"loadWattHoursNeeded": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"parallelStrings": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"runtimeHours": {
"type": [
"null",
"number"
]
},
"runtimeMinutes": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"totalBatteries": {
"type": [
"null",
"number"
]
},
"usableWh": {
"type": [
"null",
"number"
]
},
"usableWhPerString": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T22:51:08.832Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-01T22:51:08.558Z"
},
"resource": "https://electrical-calc.x402tookit.com/battery-bank",
"serviceName": "Electrical Calculators",
"tags": [
"battery",
"runtime",
"bank",
"inverter"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Battery bank layout (series and parallel counts) and runtime from load, voltage, Ah, depth of discharge and efficiency."
}What the leaf hashes
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Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af