Power calculator

Millipede Designs

About this app

Planning an off-grid solar system, preparing a home backup power station, or building a portable power box can be overwhelming with all the electrical formulas. PowerCalc simplifies this process by turning complex engineering calculations into a user-friendly experience. Whether you are dealing with frequent power outages, setting up an RV solar system, or designing a robust home energy backup, this app helps you size every component of your electrical system with confidence.

The journey to a reliable backup system starts with understanding your energy consumption. With our integrated load calculator, you can estimate your total power demand by selecting common household appliances or inputting custom devices. The system automatically accounts for runtimes and critical surge factors for devices with electric motors, such as refrigerators and water pumps, ensuring your calculations reflect real-world usage rather than just theoretical nominal values.

Choosing the right battery bank is crucial for system longevity and efficiency. This application calculates the precise battery capacity in Amp-hours or Watt-hours required to keep your appliances running for your target duration. It supports multiple battery chemistries including Lithium Iron Phosphate, Lithium-ion, AGM, and Gel, automatically adjusting the calculations based on their safe depth of discharge limits. You can customize your system voltage to twelve, twenty-four, or forty-eight volts and adjust the inverter efficiency slider to get highly accurate backup runtime estimates.

To prevent system failures, the app calculates the required continuous and peak power ratings for your inverter, adding a safety margin to handle simultaneous appliance startups. More importantly, it features an advanced wire gauge calculator that calculates the exact cable cross-section needed between your battery bank and the inverter. By calculating the maximum current draw, the app recommends safe copper wire sizes in square millimeters to prevent cable overheating and dangerous voltage drops.

PowerCalc is designed for DIY enthusiasts, electricians, solar installers, and anyone wanting to take control of their energy independence. Built with a modern, fast, and responsive interface, it provides instant recalculations as you adjust your parameters, making it the ultimate tool for designing safe and efficient power backup systems

What’s new

v.1.0.0