Victron Toolkit is a free Android app developed by Victron Energy BV that is designed to help users with electrical calculations and provide information on Victron Energy Multi and Quattro inverter/chargers. The app is perfect for professionals and hobbyists in the electrical and electronics industries, as well as those who own Victron Energy products.

The app's main features include cable size and voltage drop calculation, LED code decoding, and temperature derating calculation. The cable size and voltage drop calculation feature is particularly useful in determining the right cable length, amperes, and cable cross-section to determine the voltage drop over the cable. Meanwhile, the LED code decoding feature allows users to understand all LED codes from Victron Energy Multi and Quattro inverter/chargers. Finally, the temperature derating calculation feature helps users calculate output power derating for inverters and chargers based on the expected ambient temperature.

Overall, the Victron Toolkit is a versatile and easy-to-use app that provides valuable information for professionals and hobbyists alike. It is a must-have for anyone who wants to ensure that their electrical calculations are accurate and efficient.