Home energy math for agents: bills, appliance loads, solar sizing, heat loss, HVAC load checks, insulation, water heating, EV charging and fuel cost.
payments ON MAINNET (real money) · 9 live endpoints
| Endpoint | Price | What it answers |
|---|---|---|
GET /bill-estimate | $0.02 | Estimate a monthly electricity bill from kWh with block-tier rates, a fixed monthly charge and a tax or fee percentage. |
GET /ev-charging | $0.02 | Electric vehicle charging time, cost and range added from battery size, charge levels, charger power or circuit, and price. |
GET /heat-loss | $0.02 | Heat loss of a building in BTU/h and watts from surface areas and R-values plus air leakage, and yearly energy from degree-days. |
GET /heating-cost-compare | $0.02 | Cost per million BTU of delivered heat for resistance, heat pump, gas, propane and heating oil furnaces, from your prices. |
GET /household-load | $0.02 | Total a list of appliances (watts, hours a day, quantity) into kWh and cost per day, month and year, with each one's share. |
GET /hvac-sizing | $0.02 | Room air-conditioner BTU from floor area (ENERGY STAR chart), tons, and an under- or over-sizing check against a load. |
GET /insulation-r-value | $0.02 | R-value and U-factor of a wall or roof assembly from layers and thickness, with a framing-fraction correction and heat flow. |
GET /solar-sizing | $0.02 | Size a rooftop solar system from annual kWh and peak sun hours: kW, panel count, yearly output, savings and simple payback. |
GET /water-heater | $0.02 | Water heater recovery rate (gallons an hour), tank heat-up time and energy cost from input power, efficiency and rise. |
GET /catalog returns this list as JSON. Activity hub · uptime.
Home energy calculators using standard physics, published conversion factors (EIA, NREL PVWatts defaults, ENERGY STAR) and your inputs, provided as is. Results are estimates for planning, not engineering design: heating, cooling, solar and electrical work needs a qualified contractor, a Manual J load calculation and local code review. Utility rates, climate and equipment performance vary. Every paid response carries a disclaimer field.