Energy

Estimate battery charge time from capacity, SOC window, charger or source limit, efficiency, taper behavior, C-rate guidance, cost, and deadline fit.

Choose a ceiling fan size from room area, ceiling height, airflow need, and location rating, then check blade span, clearance, downrod, and run cost.

Size a dehumidifier from room area, humidity, dampness, temperature, moisture sources, drainage, runtime, and energy-cost assumptions.

Calculate residential panel demand from dwelling area, appliances, HVAC, EV charging, and custom loads with service headroom checks.

Size a generator from running and starting watt loads, then compare surge method, derating, reserve, voltage, and priority warnings.

Estimate heat pump savings from current fuel use, COP or HSPF2, utility prices, installed cost, incentives, payback, and break-even checks.

Estimate LED upgrade savings, payback, lifetime net savings, and CO2 impact from wattage, fixture count, hours, rates, rebates, and lifespan.

Estimate rooftop solar panel fit from roof size, setbacks, obstructions, panel dimensions, orientation, losses, annual kWh, target size, and cost.

Size a solar panel array from monthly kWh, target offset, peak sun hours, panel watts, system losses, and roof-area fit checks.

Model a solar payback period from installed cost, incentives, production, utility rates, export credits, degradation, and annual cash flow.

Size a storage or tankless water heater from peak-hour use, fixture flow, temperature rise, reserve, and BTU or kW fit checks.

Compare current and proposed window U-values, total area, heat flow, R-value, and seasonal conduction savings with target and SHGC cautions.