Devel XPT Series, User Manual

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Before the battery voltage goes below 9VDC, the charging can be activated when the switch is turned to
“Off”, then to “ON”.
When the voltage goes below 9VDC, and you accidently turn the switch to OFF or disconnect the inverter
from battery, the inverter will not be able to charge the battery once again, because the CPU loses memory
during this process.
Tabel 2.5.3 AC Charging Current for XPT model 
The charging capacity will go to peak in around 3 seconds. This may cause a generator to drop frequency,
making inverter transfer to battery mode.
It is suggested to gradually put charging load on the generator by switching the charging switch from min to
max, together with the 15s 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.
2.4.3 Transfer
While in the Standby Mode, the AC input is continually monitored. Whenever AC power falls below the
VAC Trip voltage (154 VAC, default setting for 230VAC,90VAC for 120VAC), the inverter automatically
transfers back to the Invert Mode with minimum interruption to your appliances - as long as the inverter is
turned on. The transfer from Standby mode to Inverter mode occurs in approximately 8 milliseconds. And it
is the same time from Inverter mode to Standby mode.
Though it is not designed as a computer UPS system, this transfer time is usually fast enough to keep your
equipment powered up.
There is a 15-second delay from the time the inverter senses that continuously qualified AC is present at the
input terminals to when the transfer is made. This delay is built in to provide time for a generator to spin-up
to a stable voltage 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 switching when input utility is
unstable.
2.4.4 Auto frequency adjust
Model
Watt
Battery Voltage
AC Charger Current
Max
Model
Watt
Battery Voltage
AC Charger Current
Max
1.000
~
1.500
12Vdc 45 ± 5Amp
2.000
12Vdc 70 ± 5Amp
24Vdc 25 ± 5Amp 24Vdc 30 ± 5Amp
48Vdc 15 ± 5Amp 48Vdc 20 ± 5Amp
3.000
12Vdc 80 ± 5Amp
4.000
12Vdc 120 ± 5Amp
24Vdc 45 ± 5Amp 24Vdc 65 ± 5Amp
48Vdc 30 ± 5Amp 48Vdc 40 ± 5Amp
5.000
24Vdc 80 ± 5Amp
6.000
24Vdc 90 ± 5Amp
48Vdc 50 ± 5Amp 48Vdc 60 ± 5Amp
8.000
24Vdc 120 ± 5Amp 10.000 48Vdc 100 ± 5Amp
48Vdc 80 ± 5Amp 12.000 48Vdc 120 ± 5Amp