Product Manual

switch delay our inverter gives the generator enough time to spin up. This will depend on the size of the

generator and rate of charge.

Generally, the Bulk Charging Current should be limited to 20% of the capacity of the battery bank. Higher

charging current may be used if permitted by the battery manufacturer.

Warning: Items of note not covered under warranty.

To set the charge current control switch, use a small jeweler’s style flat-head screwdriver

and gently turn to

avoid breakage due to over‐turning.

To guarantee the best performance of the built in AC charger, when the AC input is from a generator,

the standby generator should be of a least 50% higher capacity than the inverter. Example, if you are

using a 2000 watt inverter, the generator must be 3000 watt or larger. If using a 3000 watt inverter, the

generator must be 4500 watt or larger, an so on. If operating with an under-rated generator with

unqualified wave form may cause premature failure and is not covered under warranty.

2.5.3 Transfer

Swift Power Transfer

While in Standby Mode, the AC input of the inverter is continually monitored. Whenever AC power falls

below the low AC voltage trip voltage (90VAC default setting for 120VAC), the inverter automatically

transfers back to the Invert Mode with minimum power interruption to your appliances – as long as the

inverter is turned on. The transfer from Standby Mode to Inverter Mode occurs in approximately 10

milliseconds. It is the same from Inverter Mode to Standby Mode. This transfer time is usually fast enough

to keep your equipment power up, thus our inverter can be used as a line interactive UPS.

Synchronized Power Transfer

When a load is transferred from inverter AC output to another backup AC source of power through the transfer

switch, there will be a finite interruption of power to the load for transfer to take place. A mismatch of phase

and frequency of the inverter AC output and the backup AC source in transfer is likely to damage the backup

AC source / a reactive load. With sophisticated circuitry design, our inverter will first lock on the frequency

and phase of the input shore power/generator power and make a smooth and safe transfer at the zero voltage

point of minimize the impact on the power modules.

Transfer Delay

There is a 15 second delay rom the time the inverter senses a continuously qualified AC is present at the input

terminals to when the transfer is made. This delay is built-in to provide sufficient time for a generator to spin-

up to a stable voltage and frequency and avoid relay chattering. The inverter will not transfer to generator until

it has locked onto the generator’s output. This delay is also designed to avoid frequent switch when input

utility is unstable.

2.5.4 Auto Frequency Adjust

The factory default configuration for inverters sold in the American market is 60Hz. If the output frequency

needs to be changed, this is done by putting in a valid input Power Source to the inverter’s input lines. Once

the inverter validates the input, the output will automatically change. NOTE: The inverter will oupt factory set

frequency of 60Hz controlled with DIP switch #4.

2.5.5 Power Saver

There are 2 different working statuses for the Global LF inverters:

“Power On” and “Power Off”.

When the power switch is in “Unit Off” position, the inverter is powered off.