Calculators - My Walden Labs

Here you’ll find shortcuts to all the self-reliance calculators from our Execution Plans.

Energy Calculators

Calculate your daily watt hour usage (you need to know this to correctly size a solar PV system).

Calculate the minimum system size for your energy requirements.

Calculate how many solar panels of a certain wattage you need in your array to meet the specified system size.

This calculator will show you how large battery capacity you need in a solar PV system, as well as how many batteries wired in series and parallel.

Calculate the current (amps). You’ll need to know this to calculate the correct wire thickness.

Calculate the required thickness of wires for your solar PV system

This calculator will help you calculate the size of a catchment area, for example a roof.

This calculator will help you calculate how much rainwater in gallons you can collect annually from a certain catchment area.

This calculator will help you calculate how much rainwater in liters you can collect annually from a certain catchment area.