Battery Selection - Tripp Lite APSX3024SW Owner's Manual

Battery Selection

Select Battery Type
Select "Deep Cycle" batteries to enjoy optimum performance from your Inverter/Charger. Batteries of either Wet-Cell (vented) or Gel-Cell /
Absorbed Glass Mat (sealed) construction are ideal. 6-volt "golf cart," Marine Deep-Cycle or 8D Deep-Cycle batteries are also acceptable.
You must set the Inverter/Charger's Battery Type DIP Switch (see Configuration section for more information) to match the type of
batteries you connect or your batteries may be degraded or damaged over an extended period of time.
Match Battery Amp-Hour Capacity to Your Application
Select a battery or system of batteries that will provide your Inverter/Charger with proper DC voltage and an adequate amp-hour capacity
to power your application. Even though Tripp Lite Inverter/Chargers are highly efficient at DC-to-AC inversion, their rated output capacities
are limited by the total amp-hour capacity of connected batteries plus the output of an alternator when one is used.
STEP 1) Determine Total Wattage Required
Add the wattage ratings of all equipment you will connect to your Inverter/
Charger. Wattage ratings are usually listed in equipment manuals or on
nameplates. If your equipment is rated in amps, multiply that number
times AC utility voltage to estimate watts. (Example: a drill requires 2.8
amps. 2.8 amps × 230 volts = 640 watts.)
NOTE: Your Inverter/Charger will operate at higher efficiencies at about 75% - 80% of
nameplate rating.
STEP 2) Determine DC Battery Amps Required
Divide the total wattage required (from step 1, above) by the nominal
battery voltage to determine the DC amps required.
STEP 3) Estimate Battery Amp-Hours Required
Multiply the DC amps required (from step 2, above) by the number of
hours you estimate you will operate your equipment exclusively from
battery power before you have to recharge your batteries with utility- or
generator-supplied AC power. Compensate for inefficiency by
multiplying this number by 1.2. This will give you a rough estimate of how
many amp-hours of battery power (from one or several batteries) you
should connect to your Inverter/Charger.
NOTE: Battery amp-hour ratings are usually given for a 20-hour discharge rate. Actual amp-
hour capacities are less when batteries are discharged at faster rates. For example, batteries
discharged in 55 minutes provide only 50% of their listed amp-hour ratings, while batteries
discharged in 9 minutes provide as little as 30% of their amp-hour ratings.
STEP 4) Estimate Battery Recharge Required, Given Your Application
You must allow your batteries to recharge long enough to replace the
charge lost during inverter operation or else you will eventually run down
your batteries. To estimate the minimum amount of time you need to
recharge your batteries given your application, divide your required battery
amp-hours (from step 3, above) by your Inverter/Charger's rated charging
amps (23A or 90A, depending on the DIP Switch #5 setting).
13mm (1/2") Drill Circular Saw
640W +
Appliances and Electronics
Refrigerator Table Fan
540W + 150W
1440 watts ÷ 48V =
30 DC Amps × 5 Hrs. Runtime
× 1.2 Inefficiency Rating =
180 Amp-Hours ÷ 23 Amps
Inverter/Charger Rating =
10
Example
Tools
800W = 1440W
Signal Desktop Computer with
Relay Tower Large LCD Monitor
+ 500W + 250W =
30 DC Amps
180 Amp-Hours
7.8 Hours Recharge
1440W