{"uid":"cap_wdImv2KegiqXwmiqpF73i","slug":"solar-halowerk-inverter-cable-loss-calculator-e4bfa44d","name":"Solar Halowerk Inverter & Cable Loss Calculator","description":"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.","url":"https://solar.halowerk.com/inverter-losses","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"cable":{"type":"object","required":["length_m","cross_section_mm2"],"properties":{"length_m":{"type":"number","maximum":200,"minimum":0.1,"description":"One-way run; the calculation doubles it."},"material":{"enum":["copper","aluminium"],"type":"string","default":"copper"},"cross_section_mm2":{"type":"number","maximum":500,"minimum":0.5}},"additionalProperties":false},"load_w":{"type":"number","maximum":100000,"minimum":1,"description":"AC power drawn at the output."},"inverter":{"type":"object","properties":{"idle_w":{"type":"number","default":15,"maximum":500,"minimum":0},"rated_w":{"type":"number","default":1200,"maximum":100000,"minimum":50},"peak_efficiency":{"type":"number","default":0.93,"maximum":0.99,"minimum":0.5},"efficiency_at_load":{"type":"number","maximum":0.99,"minimum":0.3,"description":"Measured efficiency at this exact load, overrides the model."}},"additionalProperties":false},"battery_voltage_v":{"type":"number","maximum":1000,"minimum":6},"max_voltage_drop_percent":{"type":"number","default":3,"maximum":10,"minimum":0.5}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Iif60WDFVAP0_T2vTmXSw","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates DC cable resistive losses and inverter efficiency losses for a solar power system given cable specs, inverter parameters, battery voltage, and load.","exampleAgentPrompt":"For my 24V solar system, calculate the cable and inverter losses when running a 600W load — the copper cable is 4mm² cross-section with a 3-metre one-way run, and my inverter is rated at 1200W with 93% peak efficiency and 15W idle draw.","exampleUseCases":[{"title":"Off-grid van build wiring check","prompt":"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?"},{"title":"Inverter efficiency at partial load","prompt":"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."},{"title":"Oversized cable vs thin cable comparison","prompt":"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."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:37:15.253Z","isFirstParty":false}