Conext SW 4024-120 Install Guide

Table Of Contents

Battery Information

975-0639-01-03 1–37

This guide for use by qualified personnel only

Restrictions on Motor Size

An appliance may require three to six times its normal running current in order to start.

The Conext SW can handle surges up to twice its rated amount (surge current) for five

seconds. For example, the model Conext SW 4024 120/240 is rated as having a

maximum continuous output current of 15 amps and a surge capability of 32 amps. In

motors, the locked rotor amp (also called its starting current) may be specified on the

motor nameplate as “LRA” or “LRI”. The LRA must not exceed the surge current rating

of 32 amps.

When considering appliances with large motors, follow these guidelines:

• Make sure that the motor’s LRA rating is no more than surge current amps. The

Conext SW may not be able to start a motor with a higher LRA, and the Conext SW

will shut down if the attempt is made.

• Make sure the battery bank, DC cables and DC fuses are capable of handling up to

600 amps DC for five seconds. A weaker circuit may not be able to provide

sufficient power to the Conext SW to allow the Conext SW to start up the appliance.

Again, if the circuit cannot deliver the required current, the system may shut down

or the fuse may open.

Table 1-5 Battery Sizing Worksheet

Appliance

(A) Power

Consumption (Watts)

(B) Operating Time per

Day (Hours)

Daily watt-hours

needed for this

appliance

(= A × B)

W hours Wh

Total daily watt-hours of AC load Wh

× Number of days between charges

= Total watt-hours of AC load between charges Wh

Battery Ah used between charges (divide by 20 for 24 volt system) Ah

Recommended Battery Bank Size in Ah (multiply by 2) Ah