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Solar Halowerk Inverter & Cable Loss Calculator
x402
Solar Halowerk Inverter & Cable Loss Calculator is a paid API for AI agents from solar.halowerk.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Calculates DC cable resistive losses and inverter efficiency losses for a solar power system given cable specs, inverter parameters, battery voltage, and load.
Price / call$0.002
Success—
StatusUnknown
How this service works
Cable loss uses the DC resistance of the two-way run at twenty degrees Celsius; warm cable in a hot compartment carries roughly four percent more resistance per ten kelvin, which is not applied. Inverter loss follows a three-part model of idle draw, a proportional share and a quadratic share, fitted so that the stated peak efficiency is met near half of the rated power.
Output
Returns calculated DC cable resistive loss (in watts and as a percentage voltage drop), inverter loss (modelled from idle draw, proportional share, and quadratic share), and likely total power drawn from the battery — allowing the caller to assess whether cable sizing is adequate and what the real-world system efficiency is at the specified load.
Example use cases
Off-grid van build wiring check
“I'm building a 12V van solar system and want to check my losses — I have a 5-metre one-way copper cable run at 6mm² cross-section, a 1000W inverter with 15W idle and 92% peak efficiency, and I'm running 400W of appliances. Can you calculate the cable and inverter losses?”
Inverter efficiency at partial load
“My 48V solar setup has a 3000W inverter with 20W idle draw and 95% peak efficiency — what are the total losses when I'm only drawing 800W AC? The copper cables are 10mm² with a 2-metre one-way run.”
Oversized cable vs thin cable comparison
“I want to know how much power I'm wasting in the DC cables for my 24V system — compare a 2.5mm² copper cable at 8 metres one-way versus a 6mm² cable at the same length, with a 500W load and an inverter rated at 1500W, 93% peak efficiency, and 12W idle.”
Technical details
Endpoint
POSThttps://solar.halowerk.com/inverter-lossesWhen to prefer
Use this endpoint when you need to quantify DC-side resistive losses and inverter efficiency losses in a solar or off-grid power system, particularly when sizing cables or assessing real-world system efficiency. Prefer this over generic electrical calculators because it uses a three-part inverter efficiency model (idle + proportional + quadratic) calibrated to peak efficiency near half rated power, and doubles the cable run automatically.
Side effects
- Missing required cable fields (length_m or cross_section_mm2) returns a validation error
- load_w outside range 1–100000 returns a 422 error
- battery_voltage_v not provided may result in incomplete voltage drop calculation
- Inverter rated_w below the specified load_w may produce nonsensical efficiency figures
- Floating-point precision limits for very small cross-sections or very short runs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| cable | object | |
| load_w | number | AC power drawn at the output. |
| inverter | object | |
| battery_voltage_v | number | |
| max_voltage_drop_percent | number |
Tags
x402
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