Section 4: Inverter/Charger Installation

For best performance, the wire sizes shown in the table below will allow the Prosine to operate properly. Please note that regulatory requirements may not allow you to use the wire size given for 5 foot and 10 foot distances. Also, increasing the wire size will provide longer inverter performance.

Recommended DC Cable Sizes For Proper Operation

Cable Length

 

 

 

 

 

in Feet (from

5 ft10 ft15 ft20 ft30 ft

invert/charger

 

 

 

 

 

to battery)

 

 

 

 

 

PS 2.5 12-volt

2/0 AWG

250MCM

350MCM

500MCM

750MCM

 

 

 

 

 

 

24-volt

2 AWG

2/0 AWG

4/0 AWG

250MCM

350MCM

 

 

 

 

 

 

PS 3.0 12-volt

3/0 AWG

350MCM

500MCM

750MCM

1000MCM

 

 

 

 

 

 

24-volt

1 AWG

3/0 AWG

250MCM

350MCM

500MCM

 

 

 

 

 

 

DC Disconnect

If a DC circuit breaker is used to provide over-current protection for the battery circuit, it will also meet the requirement to provide a disconnect. If a DC fuse is used to provide over-current, however, a separate DC disconnect switch or a combined “fusible disconnect” will be required. As with the AC disconnects, the DC disconnect is not intended for disconnection under load.

Battery Cable Routing

When a distance separates positive and negative battery cables, they have much more inductance than if they are close together, and when the high current drawn by the inverter is flowing, strong magnetic fields are generated. These fields may interfere with sensitive equipment, so it is very important to route the positive and negative cables in parallel, as close together as possible.

DC Cabling Connections

Color-code your battery cables with colored tape or heat shrink tubing. The standard is red for positive (+) and black for negative (–).

Use crimp-on ring terminals or set-screw type pressure connectors (i.e., “box lugs”).

For marine installations, you must use a wire protector between the set-screw and stranded wire.

If you are using crimp-on terminals, use the manufacturer’s recommended crimping tool to install them.

Prosine Installation & Operation Guide

47