Solar PV savings & CO2 calculator API

Estimate rooftop solar output and value: annual kWh = systemKw x peak-sun-hours/day x 365 x performance-ratio (default 0.8 derate); annual savings = kWh x electricity price; CO2 avoided = kWh x grid intensity; payback = install cost / annual savings. Returns annual kWh, USD saved, kg/tonnes CO2 avoided, payback years and tree equivalents. Answers 'how much will solar save me','CO2 avoided by a 5kW array','solar payback period','annual output of my panels'.

Price$0.01per request

MethodPOST

Route/v1/calc/carbon-solar-savings

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

carbonsolarpvrenewablesavingsco2energypayback

API URLhttps://x402.hexl.dev/v1/calc/carbon-solar-savings

Integration docs

Example request

{
  "systemKw": 5,
  "installCostUsd": 12000
}

Example response

{
  "systemKw": 5,
  "sunHoursPerDay": 4.5,
  "performanceRatio": 0.8,
  "gridKgCO2PerKwh": 0.4,
  "electricityPriceUsdPerKwh": 0.15,
  "annualKwh": 6570,
  "annualSavingsUsd": 985.5,
  "annualKgCO2eAvoided": 2628,
  "annualTonnesCO2eAvoided": 2.628,
  "equivalentTrees": 125.14,
  "installCostUsd": 12000,
  "paybackYears": 12.18
}

Input schema

{
  "type": "object",
  "required": [
    "systemKw"
  ],
  "properties": {
    "systemKw": {
      "type": "number",
      "examples": [
        5
      ]
    },
    "sunHoursPerDay": {
      "type": "number",
      "default": 4.5
    },
    "performanceRatio": {
      "type": "number",
      "default": 0.8
    },
    "gridKgCO2PerKwh": {
      "type": "number",
      "default": 0.4
    },
    "electricityPriceUsdPerKwh": {
      "type": "number",
      "default": 0.15
    },
    "installCostUsd": {
      "type": "number",
      "examples": [
        12000
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}