Installation; Mounting; Battery; Pv Array - Victron energy SmartSolar MPPT 250/70 Manual

4. Installation

The DC (PV) input is not isolated from the battery circuit. Therefore the PV, battery and control circuit are
considered hazardous and should not be user accessible.
For proper temperature compensated battery charging the ambient temperature of the solar charger and the
battery must be within 5°C (9°F).
The battery and PV connections must be guarded against inadvertent contact. Install the solar charger in an
enclosure or install the optional

4.1. Mounting

Mount the solar charger vertically on a non-flammable substrate, with the electrical terminals facing downwards.
The Dimension drawings [67] chapter of this manual contains the dimension drawing of the solar charger, this drawing also
indicates the mounting holes.
Observe a minimum clearance of 10cm under and above the solar charger for optimal cooling.
Mount the solar charger close to the battery, but never directly above the battery. This is to prevent damage due to gassing of the

battery.

Avoid ambient temperature differences of more than 5°C between the solar charger and the battery. These
temperature differences can lead to incorrect temperature compensated charging, which can reduce the
battery lifetime.
If large temperature differences or extreme ambient temperature conditions are expected, use a direct battery
temperature sense source like the Smart Battery Sense or a BMV or SmartShunt equipped with a temperature
sensor.
If the optional MPPT WireBox is used:
• For solar chargers with screw PV terminal use the MPPT WireBox TR.
• For solar chargers with MC4 PV terminals use the MPPT WireBox MC4.
• Affix the steel WireBox base to the solar charger before the solar charger is mounted into its final position.
• For full mounting instructions, see the
4.2. Battery
The battery supply must be protected by a fuse as per the below table.
Solar charger type
MPPT 150/60 and 250/60
MPPT 150/70 and 250/70
For Canada the battery fuse must comply with the C22.2 standards.
The battery installation must be done in accordance with the local storage battery rules. For Canada this is the
Canadian Electrical Code, Part I.
Use flexible multi stranded copper cable for the battery connections Also see chapter
precautions [1].

4.3. PV array

The solar charger can be used with a PV configuration that satisfies both these two conditions:
Page 10
MPPT solar charger manual
WireBox [9].
MPPT WireBox TR or MPPT WireBox MC4
Minimum battery fuse rating
70A
80A
quick installation guide.
Maximum battery fuse rating
80A
100A
Wiring safety
Installation