Victron energy MPPT 75/10 Manuel page 6

3. Installation
3.1. General
● Mount vertically on a non-flammable substrate, w ith the power terminals facing
dow nwards.
● Mount close to the battery, but never directly above the battery (in order to prevent
damage due to gassing of the battery).
● Use cables w ith 6 mm² cross section. Do not exceed 5 m cable length.
(if the cables to the PV panels must be longer than 5 m, increase cross section or use
parallel cables and install a junction box next to the controller and connect w ith a short 6
mm² cable to the controller).
● 20A battery fuse: replacable fuse in the controller, next to the battery terminals.
● Grounding: if grounding is required, use one grounding point only. Never ground both
the m inus of the solar array and the minus of the battery.
3.2. PV configuration
● The controller w ill 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: 75V.
The controller can be used w ith any PV configuration that satisfies the three above
mentioned conditions.
For exam ple:
12V battery and mono- or polycristalline panels
● Minimum number of cells in series: 36 (12V panel).
● Recommended number of cells for highest controller efficiency: 72
(2x 12V panel in series or 1x 24V panel).
● Maximum: 108 cells (3x 12V panel in series).
24V battery and mono- or polycristalline panels
● Minimum number of cells in series: 72
(2x 12V panel in series or 1x 24V panel).
● Maximum: 108 cells (3x 12V panel in series).
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