Victron energy MPPT 150/45-Tr Manual De Instrucciones página 8

3.2 Grounding
● Battery grounding configuration: the charger can be
configured as a positive- or negative-ground system.
Note: apply a single ground connection to prevent
malfunctioning of the system.
● Chassis grounding: A separate earth path for the chassis
ground is permitted because it is isolated from the positive and
negative terminal.
● NEC requires the use of an external ground fault protection
device (GFPD). The Victron MPPT chargers do not have
internal ground fault protection. The system electrical negative
should be bonded through a GFPD to earth ground at one (and
only one) location.
● The charger must not be connected with grounded PV arrays.
WARNING: WHEN A GROUND FAULT IS INDICATED,
BATTERY TERMINALS AND CONNECTED CIRCUITS MAY BE
UNGROUNDED AND HAZARDOUS.
3.3 PV configuration (also see the MPPT Excel sheet on our
website)
● Provide means to disconnect all current-carrying
conductors of a photovoltaic power source from all other
conductors in a building or other structure. A switch, circuit
breaker, or other device, either ac or dc, shall not be installed
in a grounded conductor if operation of that switch, circuit
breaker, or other device leaves the marked, grounded
conductor in an ungrounded and energized state.
● The controllers will operate only if the PV voltage exceeds
battery voltage (Vbat).
● PV voltage must exceed Vbat + 5V for the controller to start.
Thereafter minimum PV voltage is Vbat + 1V.
● Maximum open circuit PV voltage: 150V.
The controllers can be used with any PV configuration that
satisfies the three above mentioned conditions.
For example:
24V battery and mono- or polycristalline panels
● Minimum number of cells in series: 72 (2x 12V panel in series
or one 24V panel).
● Recommended number of cells for highest controller
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