The Cruise gets its energy either from lead batteries that have been connected in series (normally two 12 V batteries) or from the Torqeedo Power, lithium-based batteries.
When using lead batteries within the power range of the Cruise, the efficiency of a drive is important for two reasons. On the one hand, an efficient drive converts the used energy better into propulsive force. A high efficiency of the drive additionally ensures that more battery capacity is available for consumption: The more efficient a drive is, the more it prevents the effectively available battery capacity from being reduced due to unnecessarily high power intake (compare here the Background Knowledge on Calculating the Range of Electric Motors as well as the chapter on Battery Technology).
Due to the extraordinary efficiency of the Cruise, it wastes comparably little energy but its input power of 2,000 Watt is challenging to the lead battery supply. To compensate for the high-current characteristics and the loss of capacity of lead batteries concomitant to this, it is recommendable that you purchase lead batteries with comparably „good“ high-current characteristics as well as high rated capacities (ideally 4,800 Wh, i.e. two times 12 V / 200 Ah or higher rated capacities; compare Background Knowledge on Calculating the Range of Electric Motors).
Cable set for Cruise 2.0
The cable set for the Cruise 2.0 allows for a simple and safe connection of the motor. The cable set is comprised of high-current resistant connection cable corresponding to American Wire Gauge 3, high-current plugs, a main switch, a fuse, battery connections and a battery connection cable for serial connection of two 12 V batteries.
The cable set allows the motor to be connected to batteries up to 10 foot away from it. A 6 foot cable extension is available for larger distances.
Background information on the voltage indicator:
The Torqeedo Cruise 2.0 is designed to work with a nominal voltage of 24 volts in the form of two connected-in-series 12-volt batteries. When using new lead-gel batteries, the actual measured voltage depicted in the voltage indicator should range between 27 volts in a loaded state and 20 volts in an almost empty state.
The voltage range between full and empty batteries, however, depends greatly on the batteries used. For this reason, the use of the voltage indicator as an indicator of the charge state of the connected batteries requires some getting used to, and is imprecise. If the batteries are not to be included in a more complicated measuring system, however, the voltage indicator remains the best indicator for calculating the remaining residual capacity of the batteries; hence, it is integrated in the Cruise models.