8
6. Temperature Compensation
The charge voltage changes with battery temperature.
Temperature compensation of charge voltage leads to
increase battery life and decrease battery maintenance. MP-
3735 is supplied with a 3 meter temperature sensor cable for
the provided external battery temperature sensor. Charge
voltage will continuously adjust to the proper value based on
actual battery temperature, which ensures that the battery
receives the proper charge voltage as battery temperature changes during the normal operation.
MP-3735 has both internal and external temperature sensor to detect the ambient temperature. The
controller defaults to use internal temperature sensor if external temperature sensor cable is not
connected. Once the external temperature sensor cable is connected, the controller will automatically
switch to the external temperature sensor.
The graph below shows how the MP-3735 would use the external temperature sensor to adjust the Float
Voltage based on the ambient temperature.
Installation
Danger
of
explosion
from
sparking!
Danger
of
electric
shock!
Only
install
the
controller
near
the
battery
on
a
suitable
surface.
This
surface
should
be
solid,
stabile,
even,
dry
and
nonflammable.
The
battery
cable
should
be
as
short
as
possible (1-2m)
and
have
a
suitable
cable
diameter
size for
minimum
loss.(Recommended
cable
for
MP-3735
is
25
sq.mm
and
2
m
length)
Do
not
install
MP-3735
outdoors,
the
unit
should
be
installed
so
that
it
is
protected
against
humidity,
dripping,
rainwater
as
well
as
direct
and
indirect
warming from sunlight.
To
ensure proper
air
circulation
for
cooling
MP-3735,
an
area
of
15cm
on
each
side
of
the
MP-3735
must
be
kept
free.
The
LCD
display
should
be
protected
against
UV
rays(e.g.
sunlight).
Long
time
exposure
to
UV
rays
can
permanently
discolor
the
LCD
The
solar
charge
controller
may
only
be
connected
to
the
local
loads
and
the
battery
by
qualified
personnel
and
in
accordance
with
the
applicable
regulations.
Follow
the
installation
and
operating
instructions
for
all
components
of
the
PV
system.
Ensure
that
no
cables
are
damaged.
Ensure
that
polarity
of
Solar
panel/battery/load
is
connected
in
proper
way.
Ensure all terminations are secure and clean.
