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We recommend that you achieve the required battery capacity in Wh using as few par-
allel connections as possible with as few big batteries as possible. So, to give yourself a
battery capacity of e.g. 4,800 Wh (at 24 V) it is better to use two 12 V / 200 Ah batteries
rather than several parallel and serial linked batteries (e.g. four 12 V / 100 Ah batteries).
Firstly, this avoids safety risks from battery configurations. And secondly, capacity diffe-
rences between the batteries that already exist at the time of the configuration or that de-
velop later have a negative effect on the overall battery system (capacity loss, also called
drifting). When charging your battery, make sure to only use galvanic isolated chargers. If
you charge your batteries, please make sure to use only galvanically insulated
chargers. We recommend the use of one battery charger per 12-V battery. Your dealer can
probably assist you in selecting the proper charger. Furthermore, turn the main switch
of the cable set in the „off“ position in order to avoid damages due toelectrolysis while
charging.
4.5.2 Serial/parallel linking of batteries
To avoid safety risks, capacity losses and contact point losses with serial and parallel
battery configurations, always only combine the same type of batteries (same capacity,
same age, same manufacturer, same state of charge).
Um bei einer seriellen oder parallelen Verschaltung von Batterien Sicherheitsrisiken,
Kapazitätsverlust und Kontaktstellenverluste zu vermeiden, ist es erforderlich, stets nur
gleichwertige Batterien miteinander zu kombinieren (gleiche Kapazität, gleiches Alter,
gleicher Hersteller, gleicher Ladezustand).
• Serial and parallel configured batteries must always have the same
state of charge. That is why you must use only the same type of
batteries in configurations (same capacity, same age, same ma-
nufacturer, same state of charge) and fully charge each battery
separately in your charger before you connect it up. Differences
in the state of charge can lead to extremely high compensatory
currents or overloads on the cables and plugs or the battery itself.
In extreme cases this could even cause fire or injury.
• Protect batteries, the main switch, contacts and plug connections
from moisture
• When working with or near batteries avoid wearing metal jewelry
and laying tools on the batteries as this could result in a short
circuit.
• When connecting batteries ensure the right polarity.
• Only use Torqeedo cable set. When using different cables there is
a risk of wrong dimensioning and local overheating and even fire.
When using other cables consult a specialist.
4.5 Basic information on battery supply
Principally, Cruise R and Cruise T models may be operated with lead-acid, lead-gel, AGM
or lithium-based batteries.
For performance and ease of operation reasons, Torqeedo recommends to connect the
Power 26-104 (cf. chapter 4.6).
You may, however, also connect conventional lithium based batteries as well as lead-
acid, lead-gel or AGM batteries without any problem (chapter 4.7)
4.5.1 Short remarks on battery supply
In general the Cruise models can be operated with lead-gel, AGM or lithium-based batte-
ries.
We do not recommend using starter batteries as they can be damaged after a few cycles
if the discharge is lower. If lead-based batteries are to be used we recommend so-called
“traction batteries” or “deep cycle batteries“ that have been designed for an average
depth of discharge per cycle of 80 % as they are used for example in fork lift trucks.
So-called “marine” batteries can also be used. Here we recommend higher nominal
capacities (at least 180 Ah) so as not to exceed a 50 % depth of discharge.
To calculate the travel times and range of the batteries, you need to know the battery ca-
pacity. In the following, this is stated in watt-hours [Wh]. The number of watt-hours can
easily be matched with the input power of the motor in watts [W]: The Cruise 2.0 R has
an input power of 2,000 W and consumes 2,000 Wh in one hour at full speed. The Cruise
4.0 R has an input power of 4,000 W and consumes 4,000 Wh in one hour at full speed.
The nominal capacity of a battery [Wh] is calculated by multiplying the charge [Ah] with
the nominal voltage [V]. So a battery with 12 V and 100 Ah has a nominal capacity of
1,200 Wh.
In general, lead-acid, lead-gel and AGM batteries do not fully provide the battery’s
calculated nominal capacity. This is in particular due to the high current capabilities of
lead batteries. In order to counteract this effect we recommend using larger batteries.
For lithium based batteries this effect is negligible.
In addition to the actual available battery capacity of the boat type, the selected output
level (lower life and range at higher speed) and the external temperature also play an
important role for the range and life expected.
