Heart Interface HF12-1200 - Battery Sizing

allows
the battery volta.ge
to momentarilV
drof
below 10.5 volts.
This
will
allow
the
voltage
to
dip
substantially while
starting
an induction
moror.
The high
b3tlery cut
out is
designed
to
protect
the
Heart
from
excessive
input
voltage.
When
this circuit is
activated
the
low
battery
LED comes
on red,
just
as in
the case
of the t6w
battery cutout.
once the
unit shuts
down, the
green
overload tight
is
left
on.
If
the
low
battery L.ED
comes
on
you
should
measure
the battery
voltage
to
determine
if
it is high
or
low.
If
it
is
high
you
are
probably
overcharging
the
baitery
an?
should check
both the
charging system
and the
water
level
in
the
battery. If
the
battery voltage
is low
then
it is
time
to
recharge
When
clgcking
for_lo,y
battery voltage
bear in
mind that
this low
voltage
will rebound
when
the
load
is
removed. If
the
low battery
protection
circuitry
shuts the
unit
down it is
quite
likely
that the battery voltage
will measure
higher
than the 10.5
volt
cutotT
point.
Put
a
ioad
on the battery bank
and recheck
the voltage.
MAINTENAI\CB
The
Heart is
a
solid-state electronic
device
that requires
no
maintenance.
It
is recom-
mended
that
you
clean
the unit
periodically
with
a damp
cloth.
. .
KeegtheHeartdryatalltimes.Ifwatergetsinsidetheunitimmediatelydisconnectfrom
the
batteries and dry
it
out.
Make
sure it
is completely
dry
before
attempting
ro
use the
unit.
WhiletheHeartdoes
notrequrlg
ally
maintenance,
it
isvery
important
to
performregular
maintenance
on the
battery
bank.
This
includes
checking the
electrolyte
level'and
filling-with
distilled
water as necessary,
and
cleaning
all
battery
cbnnections.
keeping
the rops
6f
tne
batteries
clean
will
help
reduce
their
tendency
ro
self discharge.
BATTERIES
_
The
performance
of
your
Heart Interface
will be highly
dependent
on
the
battery
bank
thatyou
use.
The
following
information
will
help you
to understand
how
to
size and
miintain
your
battery
bank.
BATTERY
SIZING:
. Th"
size
of
your
battery
bank
will depend
entirely
on
the loads
that
you
operare
and
the
time
between recharges.
We
recommend
that
you
use true
deep-cycle
batteries
with
your
Heart
Interface.
Golf
cart batterigs
are
a
good
choice.
RV
ormarine
deep-cycle
batteriei
ate
acceptable,
but
do not
have
the-life
expectancy
of the
golf
cart
b.1tt9{y.
Do
not use
auromotive
starting
barteries
as
they
will
die after
o$V
u very
few
a99n-Aipfrarge
cycles.
Even
the
8D
rype
dlesel
starting
batteries
will nothold
up
underdeep
disch#ging.
ttrere
is no
substitute
foi
a true heavy-dut!
deep-cycle
battery.
.
Gaining
increasing
popularity
is
the
sealed
gel-cell
type
battery.
Several
fearures
make
these
gel-cells
attractive, including
no maintenance,
no
chance
of
spiils,
and
some
types
are
capable
of accepting
a
very
high
charge
current
for
rapid recharging.
In
addition
theinternal