3. Determine the
total
Watt-hours of energy needed. Then multiply
the average
power consumption
in
Watts by the number of hours of run time. For example:
2000
Watts for
10
hours
=
20,000 Watt hours. Using the
2000
Watts (or
200
Amps) for 1 0
hours
example
as above, then 200
Amps
is
needed for 1
0 hours.
This provides us with the basic Amp-hours
(AH)
of battery that
is
required.
Ten
hours at
200
Amps
equals 2000
Amp Hours (AH). This answer
is
just a
beginning because there are other conditions that determine actual
run time.
These
include:
•
AC
appliance load
and time
in
use (Basic Amp Hour)
• Cable
gauge and
length
•
Charge level
of the batteries (between use, chargers have to be
able
to fully
charge the batteries)
•
Temperature of the batteries (colder batteries provide fewer Amps)
•
Age and condition of the batteries
(older
batteries
lose
capacity Amp hours)
• Compliance
with turning off unnecessary
AC
and
DC
loads.
If
there
is
any doubt about sizing the battery bank, it is safe to over estimate the
Amp hour requirements of the battery bank.
Note:
The type of batteries you use to power your high-power inverter is
important. Operating a high-power inverter
will routinely
discharge batteries
and they
will require frequent recharging. Batteries used to start engines are not
designed to repeatedly
charge and discharge.
We
recommend using
"deep-
cycle"
or
"marine"
rated batteries.
CABLE GAUGES
When connecting the inverter to a battery bank use the thickest stranded
insulated copper wire
available
in the shortest
length practical.
LENGTH
PD2000
1ft.
6AWG
2ft.
SAWG
3ft.
SAWG
4ft.
3AWG
Sft.
2AWG
6ft.
2AWG
7ft.
1AWG
8ft.
1/0 AWG
9ft.
2/0AWG
1Oft.
2/0
AWG
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