Solar payback calculator

Open Solar payback calculator on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "solar-payback-calculator",
  "category": "calculators",
  "built": true,
  "requirements": "Installed cost 0 to 1 trillion in one currency; first-year generation 0 to 1 billion kWh; self-consumption 0 to 100%; prices explicitly entered from 0 to 100,000 per kWh. Degradation 0 to 99%; annual price change -99 to 100%; horizon 1 to 100 whole years. Extreme combinations outside the shared finite-output limit are rejected. JSON report, results CSV and full year-zero-through-horizon cash-flow CSV.",
  "implementation": {
    "fields": [
      {
        "key": "installedCost",
        "label": "Installed cost",
        "value": 6000,
        "type": "number",
        "min": 0,
        "max": 1000000000000,
        "step": "any"
      },
      {
        "key": "generation",
        "label": "First-year generation (kWh)",
        "value": 4000,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "selfConsumption",
        "label": "Generation used on site (%)",
        "value": 50,
        "type": "number",
        "min": 0,
        "max": 100,
        "step": "any"
      },
      {
        "key": "importTariff",
        "label": "Avoided import price per kWh",
        "value": "",
        "type": "number",
        "min": 0,
        "max": 100000,
        "step": "any",
        "help": "Required. Use the marginal energy price avoided, not a standing charge. Enter 0 explicitly if excluded."
      },
      {
        "key": "exportTariff",
        "label": "Export payment per kWh",
        "value": "",
        "type": "number",
        "min": 0,
        "max": 100000,
        "step": "any",
        "help": "Required. Enter your export payment, or 0 explicitly if exports have no value."
      },
      {
        "key": "degradation",
        "label": "Annual generation degradation (%)",
        "value": 0,
        "type": "number",
        "min": 0,
        "max": 99,
        "step": "any"
      },
      {
        "key": "escalation",
        "label": "Annual import and export price change (%)",
        "value": 0,
        "type": "number",
        "min": -99,
        "max": 100,
        "step": "any"
      },
      {
        "key": "years",
        "label": "Scenario horizon (years)",
        "value": 25,
        "type": "number",
        "min": 0,
        "max": 100,
        "step": 1
      }
    ],
    "registrationFamily": "home-energy-planning",
    "input": false,
    "live": false,
    "presentation": "metrics",
    "note": "Calculated on your device for 1 to 100 years. Enter your own import/export prices. Cash flows are undiscounted scenarios, with no tax, subsidy, finance or return guarantee.",
    "experience": {
      "automatic": false,
      "single": true,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Solar value settings",
      "placeholder": "Use the fields below",
      "help": "Enter installation cost, generation, prices and scenario assumptions in the settings. No text input is needed. Up to 1,000,000 characters. Review the settings before running.",
      "helpParts": [
        "Enter installation cost, generation, prices and scenario assumptions in the settings. No text input is needed.",
        "Up to 1,000,000 characters.",
        "Review the settings before running."
      ],
      "action": null
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}

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