Studer Innotec SA
next3
Technical user manual V1.3 © Studer-Innotec SA 27
5.2 CONNECTING THE BATTERY
The next3 is a device which DC (battery) connection is to be connected exclusively to a 48V battery.
Due to high power of the next3, the battery cables are separated in two entries in parallel to have a
more convenient handling. The recommended battery cable size is 70mm2 for a total of 140mm2
with two cables in parallel. The maximal size is 95mm2 for a total of 190mm2 section.
Battery cables must also be as short as possible, and the cross-section must conform with the
applicable regulations and standards. Sufficiently tighten the clamps on the "battery" inputs.
Each next3 is connected directly to the battery through its own protective device (fuse or circuit
breaker) and disconnection device. It should never be connected to the output of a DC voltage
regulator like solar regulator, without having the battery as a buffer.
All other consumers or sources are connected directly to the battery by their own protective and
disconnection devices.
Battery cables must always be protected by one of the following measures:
Have a protection and disconnection device (fuse, circuit breaker) on each pole or
only on the pole not connected to earth.
The protection device must be rated according to the cable cross-section but must not
exceed 1.25 x next3 maximum current.
It will be mounted as close as possible to the battery. The maximum current is given
with 16000/48=333Adc with factor: 333x1.25=416Adc
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