Green Home

Browse 11 green home tools. Opening BESS Round-trip Carbon Cost Calculator.

Building Heat Loss & Insulation CalculatorEstimate heat loss watts from envelope area, ΔT, and R-value.Use this to find where your home leaks heat and size heating correctly.
Home Insulation Savings CalculatorEstimate annual heating and cooling savings from upgrading wall insulation and windows—before/after energy use and efficiency score.Use this to see if an insulation upgrade pays for itself in lower bills.
LED Savings & ROI CalculatorCompare legacy bulb vs. LED costs, CO₂ savings, and payback time for a single fixture.Use this to see how fast swapping one bulb to LED pays back.
LED vs. Incandescent ROI CalculatorEnergy and bulb replacement savings when matching lumens with lower watts.Use this to see the full savings of switching your lighting to LED.
Smart Thermostat Savings CalculatorHVAC kWh reduction from setback schedules and seasonal rates.Use this to check if a smart thermostat would really lower your bill.
Window Solar Heat Gain (SHGC) CalculatorCooling load from glazing SHGC, area, and sun exposure.Use this to see how much your windows heat the house and add to cooling costs.
Microgrid ROI CalculatorBreak-even timeline and 10–20 year returns for solar, storage, and on-site generation microgrids.Use this to see when a solar-plus-storage microgrid starts paying for itself.
BESS Round-trip Carbon Cost CalculatorEstimate annual kg CO₂ from battery round-trip conversion losses and compare grid charging vs. renewable charging.Use this to check your battery setup is helping the climate, not hurting it.
Solar Water Heater Efficiency CalculatorEstimate thermal efficiency, absorbed kWh, and electric heating savings from tank volume, ΔT, sun hours, and collector area.Use this to see how much a solar water heater cuts your electric heating bill.
Small Wind Turbine Yield CalculatorEstimate rotor power (W), daily kWh, and annual energy from blade diameter, average wind speed, and system efficiency.Use this to check if your site has enough wind to make a turbine worthwhile.
Standby Power AggregatorAdd TVs, chargers, consoles, and adapters to see total vampire power cost and what you could buy instead.Use this to total up your standby waste and see what that money could buy instead.

BESS Round-trip Carbon Cost Calculator

Inputs

Adjust values to update results live

Battery capacity (KWH)

Round-trip efficiency (%)

AC-AC or DC-DC energy out ÷ energy in per full cycle

Conversion-loss emissions (grid-charged)

Enter kWh, efficiency, cycles & grid gCO₂/kWh

CO₂ saved with renewables

Enter values above

Renewable-charged losses

Enter values above

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How to use the BESS Round-trip Carbon Cost Calculator

The Formula

Every charge/discharge cycle wastes energy as heat in the battery, inverter, and wiring. That wasted kWh still came from somewhere—if the grid, it carries a carbon tag. Storage is only as green as the electrons you put in.

Practical Example

Loss kWh per cycle ≈ capacity × (1 ÷ efficiency − 1). Annual loss = loss per cycle × cycles/year. kg CO₂ = annual loss kWh × (gCO₂/kWh ÷ 1000). Renewable charging assumes ~0 marginal gCO₂ on those loss kWh.

About BESS Round-trip Carbon Cost Calculator

Charge from on-site solar surplus, community solar, or documented renewable tariffs during low-carbon grid hours. Pair with Solar Daily Yield and Carbon Offset tools for full-site context.

Q: Include manufacturing emissions? A: This is operational loss only—embodied carbon is separate LCA. Q: Partial cycles? A: Enter equivalent full cycles per year (annual throughput ÷ capacity). Q: 95% efficiency? A: Loss shrinks—but never zero.

Related tools

Solar & EV Carbon Offset Calculatorkg CO₂ avoided from clean kWh vs. grid emissions factor.Use this to put a real number on the emissions your solar or EV avoids.
Solar Battery Bank SizeSize an off-grid battery bank from daily use and backup days.Use this to size a battery bank that carries you through cloudy days.
Microgrid ROI CalculatorBreak-even timeline and 10–20 year returns for solar, storage, and on-site generation microgrids.Use this to see when a solar-plus-storage microgrid starts paying for itself.
Building Heat Loss & Insulation CalculatorEstimate heat loss watts from envelope area, ΔT, and R-value.Use this to find where your home leaks heat and size heating correctly.

How to use the BESS Round-trip Carbon Cost Calculator

The Formula

Practical Example

About BESS Round-trip Carbon Cost Calculator

Charge from on-site solar surplus, community solar, or documented renewable tariffs during low-carbon grid hours. Pair with Solar Daily Yield and Carbon Offset tools for full-site context.

Appliances

Green Home

Backup

EV Charging

Cost

Pool

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