Electric boat system for controlling charging and discharging

A vehicle to grid (V2G) system, comprising:

• a plurality of electric boats, each electric boat having a corresponding battery pack;
• and
• a plurality of charging-discharging units, each charging-discharging unit removably coupled to a corresponding electric boat, wherein each charging-discharging unit allows for bi-directional charging directing power to a corresponding battery pack of the corresponding electric boat in a first direction and in a second direction back to an electrical grid;
• wherein each of the corresponding battery packs are categorized into different monetization stacks for performing different functions for stability of the grid when the power is sent in the second direction back to the electrical grid, wherein the different monetization stacks are categorized based on price per kilowatt-hour (kWh).

A method for charging-discharging units to charge and discharge battery packs of electric boats, comprising:

• connecting the battery packs of each of the electric boats to a corresponding charging-discharging unit;
• using the corresponding charging-discharging unit for bi-directional charging, the corresponding charging unit directing power to a corresponding battery pack of a reciprocal electric boat in a first direction and in a second direction back to an electrical grid;
• categorizing the battery packs into monetization stacks based on price per kWh, the monetization stacks used for frequency regulation, peak shaving, energy arbitrage, demand response, renewable integration, capacity market, and backup power;
• and
• prioritizing a first group of the monetization stacks generating a higher price per kWh from a second group generating a lower price per kWh.