When using the ENERGY-S device, utility tokens INVX are credited from the saved energy. For every 100 kWh consumed, 10 INVX are credited.
The total volume of utility tokens for all device owners amounts to 100 MWh.
The received tokens are stored in your wallet. The INVX exchange rate is determined by trading on the exchange.
Details about the utility token can be found here: www.invxcoin.com