CEN-TECH 60704 Owner's Manual & Safety Instructions page 7

4. Battery capacity selection:
about 1 hour
Inverter discharge time
Output (Minimum battery
capacity)
500W 80 Ah
1000W 150 Ah
1500W 240 Ah
2000W 300 Ah
3000W 450 Ah
4000W 600 Ah
5000W 750 Ah
Consult the chart above for approximate run time
at different battery capacities. If the battery
does not have a capacity this large individually,
use a bank of batteries as explained below.
5. Battery Bank assembly instructions:
a. Read the following safety rules before
assembling the battery bank:
• Connect batteries in parallel
(negative terminals together to one cable;
positive terminals together to the other cable)
as shown in Battery Bank Example ONLY.
• Do not connect 12V batteries in series
(from negative of one battery
to the positive of the next).
This connection can result in voltage high
enough to cause ELECTROCUTION.
• Wear splash-resistant ANSI-approved
safety goggles and electrically insulated
gloves while assembling battery bank.
• Only connect similar batteries together in a
battery bank. Do not connect old and new
batteries together, flooded and gel cells together,
or batteries of different capacities together.
• Connect all batteries in the battery bank together
using cables of the thickness recommended
on the specification sheet or thicker.
Since amp draw on this low-voltage circuit will be
very high, thinner cables present a fire hazard.
• Locate battery bank in a clean,
well-ventilated area, away from ignition sources
and flammable materials. Batteries release
explosive hydrogen gas while charging.
• Charge, store, and maintain batteries
according to supplier's instructions.
Item 60704
about 4 hour
discharge time
(Optimal battery
capacity)
200 Ah
400 Ah
700 Ah
1000 Ah
1500 Ah
2000 Ah
2500 Ah
For technical questions, please call 1-800-444-3353.
(To Negative
Inverter Terminal)
OUTPUT
–
Capacity, Connect
–
–
12 V / 400^ Ah Battery Bank Example
* 200 Ah batteries shown for illustration.
^ Bank Capacity = (single battery capacity) x (# of
batteries) 400 Ah capacity is for two, 200 Ah batteries.
b. Connect the batteries in parallel as shown above.
Connect all of the positive terminals
to one another.
c. Then connect all the negative terminals
to one another.
d. Connect the negative and positive output cables
to opposite ends of the bank. Do not allow
the output cables to touch one another.
e. Test the voltages at the output cables to help
ensure that the battery bank is properly wired.
If the voltage is higher than 13 volts, then part
of the battery bank is likely connected in series
(a negative terminal of one battery attached to a
positive terminal of another) instead of in parallel.
Carefully examine the diagram and correct
the wiring before attaching to the Inverter.
6. Turn the Inverter's Switch off.
7. Connect the output cables from the
battery bank to the Inverter.
12 V /
200* Ah
Lead- Acid
+
Battery
To Increase
Additional
12 V / 200* Ah
+
Lead-Acid
Batteries Here
12 V /
200* Ah
Lead- Acid
+
Battery
OUTPUT
(To Positive
Inverter Terminal)
Page 7