Power Inverter with Power Factor Correction Battery Charger (PFC Charger)

The Sigineer Power pure sine wave inverter/charger is equipped with an active PFC (Power Factor Corrected) multistage battery charger. The PFC feature 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.

Power Inverter with Power Factor Correction Battery Charger (PFC Charger)

Power Inverter with Power Factor Correction Battery Charger (PFC Charger)

Unlike other inverters whose max charging current decreases according to the input AC voltage, High Power pure sine wave inverter/charger is able to output max charge current as long as input AC voltage is in the range of 164-243VAC(95-127VAC for 120V model), and AC freq is in the range of 48-54Hz(58-64Hz for 60Hz model).


Power factor correction (PFC) circuit is designed to draw a sinusoidal current from the AC input line that is exactly in phase with the input voltage. As a result, the charger exhibits a power factor that is very close to unity or one, which is ideal. The Sigineer Power factor corrected battery charger are rated at greater than 0.99 power factor, which is much higher then chargers that are not power factor corrected. The improved power factor results in approximately 30% less AC input current required to deliver the same DC charging current.


Benefit of using PFC charger:

  • Improve Charger Efficiency
  • Decreased Input Apparent Power and Operation Cost
  • Minimizes the harmonic distortion and Reduces EMI/RFI noise.

battery charging stages curve

The Sigineer Power pure sine wave inverter/charger has a very rapid charge current available, and the max charge current can be adjusted from 0%-100% via a liner switch on the DC side of the inverter. This will be helpful if this powerful charger apply charging on a small capacity battery bank.
Choosing “0” in the battery type selector will disable charging function.
There are three main charging stages:

Bulk Charging: This is the initial stage of charging. While Bulk Charging, the charger supplies the battery with controlled constant current. The charger will remain in Bulk charge until the Absorption charge voltage (determined by the Battery Type selection) is achieved.
Software timer will measure the time from charger start until the battery charger reaches 0.3V below the boost voltage, then take this time as T0 and T0×10 = T1.

Absorb Charging: This is the second charging stage and begins after the absorb voltage has been reached. Absorb Charging provides the batteries with a constant voltage and reduces the DC charging current in order to maintain the absorb voltage setting.
In this period, the inverter will start a T1 timer; the charger will keep the boost voltage in Boost CV mode until the T1 timer has run out. Then drop the voltage down to the float voltage. The timer has a minimum time of 1 hour and a maximum time of 12 hours.

Float Charging: The third charging stage occurs at the end of the Absorb Charging time. While Float charging, the charge voltage is reduced to the float charge voltage (determined by the Battery Type selection*). In this stage, the batteries are kept fully charged and ready if needed by the inverter.

If the A/C is reconnected or the battery voltage drops below 12Vdc/24Vdc/48Vdc, the charger will reset the cycle above.
If the charge maintains the float state for 10 days, the charger will deliberately reset the cycle to protect the battery.

Use with Lithium Ion Battery Packs Or LifePO4 Battery from EV
“Lithium-ion” refers to a variety of lithium-based battery chemistries. The most popular is the large-format prismatic lithium iron phosphate (LiFePO4; LFP) battery.
Our smart battery charger works with various lithium batteries, pls check the battery specs and make sure our charging algorithm suits their charge voltage and cut off voltages.
The “3” position is for “AGM 2 / Lithium Battery” with CV at 14.6Vdc and Float voltage at 13.7 Vdc.

Currently, for our APC6048D, HP12048D, HP15048D HP18048D models,  we have a set of algorithm customized for the Tesla Model S 48vdc lithium battery module on battery type selector 9
That is
Low Battery Cut Off: 36/38Vdc
Low Battery Voltage Alarm/ Charger Activation: 37/39Vdc
Low Battery Cut Off Recovery: 47Vdc.
Charger Cut Off: 48Vdc
High Battery Voltage Alarm 50.5Vdc
High Battery Cut Off: 51Vdc

For our latest version of APC6024D, it works with Tesla Model S 24vdc lithium battery module with voltage settings at the half.
• Low Battery Cut Off: 18/19Vdc
• Low Battery Voltage Alarm/ Charger Activation: 19/20Vdc
• Low Battery Cut Off Recovery: 23.5Vdc
• Charger Cut Off: 24Vdc
• High Battery Voltage Alarm: 25.25Vdc
• High Battery Cut Off: 25.5Vdc

For Sigineer Power’s HP15096D inverter charger, the battery type selector position of “9” is customized with a special battery algorithm to work with Tesla Model 3 and Model S lithium-ion battery modules.
Battery type selector 7
Low Voltage cutoff: 73.6v
Low Voltage Alarm/ Charger Activation: 75v
High voltage alarm/ Charger Cut Off: 94V
High voltage cutoff:96v

Battery type selector 8
Low Voltage cutoff: 80v
Low Voltage Alarm/ Charger Activation: 81v
High voltage alarm/ Charger Cut Off: 103V
High Voltage cutoff: 105v

Battery type selector 9
Low Voltage cutoff: 72v
Low Voltage Alarm/ Charger Activation: 74v
High voltage alarm/ Charger Cut Off: 101V
High voltage cutoff:102v

Warning: The output of these units will be de-rated by about 10% when the battery voltage drops below the nominal cut off of 20V, 40V, and 80V.

If our current charging algorithms don’t match your lithium battery, welcome to contact us at info@sigineer.com for an OEM customization.

The de-sulphation cycle on switch position 8 is marked in red because this is a very dangerous setting if you do not know what you are doing. Before ever attempting to use this cycle you must clearly understand what it does and when and how you would use it.
What causes sulphation? This can occur with infrequent use of the batteries, nor if the batteries have been left discharged so low that they will not accept a charge. As the saying goes, desperate diseases must have desperate remedies. This cycle is a very high voltage charge cycle especially designed to try to break down the sulphated crust that is preventing the plates from taking a charge and thus allow the plates to clean up and accept a charge once again.
 Warning! The de-sulphation charging should not be carried out on batteries with good conditions.

Charging depleted batteries
The Sigineer Power pure sine wave inverter/charger allows start up and through power with depleted batteries.
For 12VDC models, after the battery voltage goes below 10V, if the switch is still(and always) kept in “ON” position, the inverter is always connected with battery whose voltage doesn’t drop below 2V, the inverter will be able to charge the battery once qualified AC inputs.
Before the battery voltage going below 9VDC, the charging can activated when the switch is turned to “Off”, then to “ON”.
When the voltage goes below 9VDC, and the power switch is turned to “OFF” or disconnect the inverter from battery, the inverter will not be able to charge the battery once again, because the CPU lose memory during this process.

Changing max charging current

The battery type selector position of “0” will disable battery charger.

The “Charge Current Control” knob will enable the user to control the max charging current from 15% to maximum.
Inverter charger battery type selector

Battery type selector
Switch setting Description Boost / Vdc Float / Vdc
0 Charger Off
1 Gel USA 14.0 13.7
2 AGM 1 14.1 13.4
3 AGM 2 / Lithium Battery 14.6 13.7
4 Sealed lead acid 14.4 13.6
5 Gel EURO 14.4 13.8
6 Open lead acid 14.8 13.3
7 Calcium 15.1 13.6
8 De sulphation 15.5 (4 Hours then Off)
9 Customized for EV Lithium Battery  12.625Vdc
12Vdc Mode (*2 for 24Vdc ; *4 for 48Vdc)
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