Our 100 Ah lithium ion batteries power the MarkSetBot for 24 hours in normal conditions (8-10 knots of breeze, 1-2 foot waves). Battery life is impacted by how much the Bot must move around (course changes, motoring to course), wind speed, waves, and current. In our experience, in windy conditions (over 20 knots), Bots are able to hold position for 16-20 hours… plenty of time for a normal race day. If extended battery life is needed, reach out and we can discuss options.
Navigation is when the Bot uses the most battery. For example, when navigating a Bot, it uses 30 amps; but when holding station, it uses only 5 amps. Sending a bot 1nm uses about 10Ah (20Ah round trip). That leaves you with 80Ah.
MarkSetBots report their battery status in the app, including the health of the battery, current power draw, and the percentage of power remaining, so you’re always equipped with up-to-date data.
We recommend charging your Bot after every use so that you always have a full battery for your next time on the water.