CPT series Issue: 2 - 14/12/18
Electrical Performance
SEALED LEAD ACID BATTERY CHARGING PROCESS
LiFePO4 BATTERY CHARGING PROCESS
Topology
Inverter: Full bridge topology
Charger: Isolate boost topology
Because of high efficiency MOSFETS and 16bit, 4.9MHZ microprocessor and heavy transformer, it outputs PURE SINE WAVE AC with an average
THD of 15%(Min 5%, Max 25%) depending of load connected and battery voltage. Peak efficiency is 88%.
AC Charger
CPT inverter charger is equipped with an active PFC(Power Factor Correct
ed) multistage battery charger. The PFC is used to control the amount of
power used to charge the batteries in order to obtain a power factor as close as possible to 1.
Inverter charger is able to output max current as long as input AC volt
age is in the range of 95-127VAC, and AC frequence is in range of 58-64Hz.
Before attempting to use ‘8’ position to do De-sulphation cycle you must clearly understand what it does, when and how you would use it.
De-sulphation can occur with infrequent use of batteries(nor), or if the batteries have been left discharged so low that they will not accept a charge.
This high voltage charge cycle is designed to tbreak down the sulphated crust that is preventing the plates taking a charge and allow the plates to
clean up and to accept charge once again.
*
De-sulphation
CPT inverter charger allows start up only with utility power and power the d
epleted batteries.
For 12VDC battery bank, after battery voltage goes below 10V, if inverter charger is still working and battery voltage remain higher than 2 Vdc, then
inverter charger is able to charge the batteries once qualified AC inputs.
In DC priority model, the charging can be activated by restart inverter charger unit(turn off then turn on) manually before the battery voltage goes
down below 9Vdc.
CPT inverter charger unit allows adjust charge current manually by the swit
ch on the top of inverter. Please note the pointer is between two grooves.
NEVER reverse the pointer back over 0% position(as the silver point indicate) or switch over 100% position.
Charge Current
14.4V
13.8V
12.8V
Charge at rated
constant current
Stay at
13.5-13.8V
Maintain battery
in 100% charge
Rated voltage charge until current
drops to 6.5% rated current
CURRENT
BULK CHARGE ABSORPTION FLOAT CHARGE RESET TO BULK CHG
VOLTAGE
CHARGING SPEC
* Charge hours will be a little changed accroding to different battery type and capacity
Battery selector
* Battery selector is operational only in AC priority
Switch setting 0 1 2 3 4 5 6 7 8 9
Battery type Gel USA AGM 1 AGM 2 Sealed lead acid Gel EURO Open Lead acid Calcium De-sulphation LiFePO4
Boost (Vdc) 14.0 14.1 14.6 14.4 14.4 14.8 15.1 13.6
Float (Vdc) 13.7 13.4 13.7 13.6 13.8 13.3 13.6 /
15.5
4 hours off
Charge off
Bypass only
model MAX Currents MAX Currents model
3000W 12V 120V
2000W 12V 120V 50 ± 5 Amps 75 ± 5 Amps
14.4V
13.8V
Charge at constant current
& rising voltage
Maintain battery in 100% charge
CURRENT
CONSTANT CHARGE
VOLTAGE
CHARGING SPEC
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