Important:
•
Use only PV systems with open circuit voltage below 55v & a minimum V
MP
of 17V
for 12V and 34V for 24V Charging.
•
Use wires suitable for at least 20A, but if wire runs are over 3m then larger wires are
recommended to limit voltage drop and losses.
•
Install the unit in a dry place out of direct sunlight and away from flammable liquids or
gases.
•
Battery fuse ( BF ) is always required and must be located as close to the battery as
possible, its sizing depends on the wire size and load ratings. Typically a 15A 24V
fuse would do.
•
Before connecting battery always check battery and PV panel polarity.
•
When used with panels over 200W @ 12V or 400W @ 24V the MPPT12-2P MUST
be fitted with the PVF fuse. Locate this fuse as close as possible to the MPPT. A 15A
60V fuse is recommended.
For optimal power output the following panel combinations are recommended:-
12V Charging
• 2 x 12V Battery Panels connected in series (Total V
OC
=42V & V
MP
=32V)
• 1 x 24V Battery Panel (Total V
OC
=42V & V
MP
=32V)
• 1 x 48 Cell Grid Panel (Total V
OC
=28V & V
MP
=23V)
• 1 x 54 Cell Grid Panel (Total V
OC
=32V & V
MP
=26V)
• 1 x 52 Cell Grid Panel (Total V
OC
=31V & V
MP
=25V)
• 1 x 60 Cell Grid Panel (Total V
OC
=36V & V
MP
=29V)
• 1 x 72 Cell Grid Panel (Total V
OC
=44V & V
MP
=36V)
24V Charging
• 1 x 72 Cell Grid Panel (Total V
OC
=44V & V
MP
=36V)
Page 2 of 8
Model:
MPPT12-2P
400W Solar Charger
Maximum Power Point Tracker
Operating Instructions
Please read these instructions before use
MPPT12-2P General Information:
• This MPPT is designed to auto detect 12V and 24V battery systems and select a suitable charge regime.
• Fully polymer encapsulated for improved humidity proofing and shock and vibration performance
• The absorption phase is entered following a low battery condition and is maintained for approx.1.5 hours.
• Custom float and absorption voltages and times are possible but minimum orders apply.
• This MPPT has a built in multilevel over temperature protection to improve product reliability while
maximising output power availability.
• The MPPT12-2P will efficiently charge 12V batteries from 24V panels.
• The panel voltage limits for the MPPT12-2P are: Maximum open circuit voltage below 55V.
• Minimum Maximum Power Point ( at the maximum operating temperature) must be above 17V for 12V
batteries and 34V for 24V batteries to ensure full power.
• Install the output fuse (OF) as close to the MPPT as possible a 20A fuse is recommended.
