45 Amp MPPT SOLAR Charge Controller PV Input Max 2400W to 12V/24V/48VDC Auto Charger MPPT-45F

$235.00  $189.00
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  • Model: MPPT-45F
  • Manufactured by: ROXSAT

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MPPT SOLAR Charge Controller 45Amp 12V/24V/48VDC Auto Charger MPPT-45F

A MPPT, or maximum power point tracker is an electronic DC to DC converter that optimizes the match between the solar array (PV panels), and the battery bank or utility grid. To put it simply, they convert a higher voltage DC output from solar panels down to the lower voltage needed to charge batteries.

MPPT charge controller

Battery Voltage PV Input Max Wattage PV Input DC Voltage Range PV Open Circuit Voltage * Max Charging Current
12V 600W 16VDC~100VDC 100VDC 45 amps continuous @ 40°C ambient
24V 1200W 32VDC~130VDC 145VDC 45 amps continuous @ 40°C ambient
36V 1800W 48VDC~130VDC 145VDC 45 amps continuous @ 40°C ambient
48V 2400W 64VDC~130VDC 145VDC 45 amps continuous @ 40°C ambient
*The open-circuit voltage, VOC, is the maximum voltage available from a solar cell, and this occurs at zero current.

More power from your panels

  • CE, ISO 9001
  • Solid built high quality
  • Lots of protections 
  • Large heatsink 
  • Auto green backlight on/off LCD display
  • PC software
  • Battery temperature monitoring 
  • DC voltage input auto detection 
  • Fault warning LED
  • Wall mount 
  • Solar in, battery in, load out 
  • Positive and negative separation wiring 
  • Distance wiring to prevent short circuit 
  • Large gauge wiring.  
  • Charge 2 groups: Lithium and Sealed Lead Acid, AGM/Gel, Nonsealed Lead Acid batteries 
  • Adjustable charging voltage and current

About this high efficient solar charge controller:

  • MPPT charge controller: 45A MPPT Solar charge controller(Air cooling).
  • High efficiency: MPPT efficiency>99%,Peak conversion efficiency >98%.
  • Multi-stage charging: Multi-stage charging mode.
  • DC load DC load support: 12V/24V/48V auto work.
  • DSP processors: DSP processors architecture ensures high speed and performance.
  • Protection: PV array short circuit , PV reverse polarity , Battery reverse polarity , Over charging , Output short circuit.

You should adjust the battery charging voltage set points according to your battery manufacture suggested charging voltage. 

if you don’t have it,  then you can set basic voltage set points following below

Battery Type Voltage Point Setting 12V 24V 48V


Sealed Lead Acid


Nonsealed Lead Acid

Absorption Voltage 12.5V 25.0V 50.5V
Refloat Voltage 13.7V 27.4V 54.8V
Float Voltage 14.3V 28.6V 57.2V
Lithium Absorption Voltage 13.2V 26.4V 52.8V
Refloat Voltage 13.4V 26.8V 53.6V
Float Voltage 13.5V 27.0V 54.0V

LCD/LED Display Information

  1. MENU: Enter or exit setting mode
  2. UP: Increase the setting data
  3. DOWN: Decrease the setting data
  4. ENTER: Confirm the selection in setting mode
  5. LED indicator System status
    PV Green On PV voltage normal
    Flashing every 1s PV fault is recovering
    Flashing every 2s PV fault can’t recover
    Off PV is off
  6. LED indicator System status
    BATT Yellow On Battery voltage normal
    Flashing every 1s Battery fault is recovering
    Flashing every 2s Battery fault can’t recover
    Off Battery is off
  7. LED indicator System status
    FAULT Red Flashing Fault
    Off Normal
  8. LCD display

Figure Back Panel Information

  1. LO+: The load positive terminal
  2. BA+: The battery positive terminal
  3. BA-: The battery negative terminal
  4. LO-: The load negative terminal
  5. PV-: PV array negative terminal
  6. PV+: PV array positive terminal
  7. REM: RS485 Communication network terminal(Use for computer)
  8. BTS: Battery Remote Temperature sensor terminal


Model MPPT-45F MPPT-60F MPPT-80F
Default Battery System Voltage 12V/24V/36V/48VDC (Auto detection)
PV Open Circuit Voltage 100VDC@12V/ 145VDC @24V/ 145VDC @36V/ 145VDC @48V
PV Array MPPT Voltage Range 16VDC~100VDC / 32VDC~130VDC / 48VDC~130VDC / 64VDC~130VDC
Max PV Input Power(12V) 600W 800W 1050W
Max PV Input Power(24V) 1200W 1600W 2100W
Max PV Input Power(36V) 1800W 2400W 3150W
Max PV Input Power(48V) 2400W 3200W 4200W
Absorption Voltage 12.5VDC/25.0VDC/37.5VDC/50.0VDC
Refloat Voltage 13.7VDC/27.4VDC/41.1VDC/54.8VDC
Float Voltage 14.3VDC/28.6VDC/42.9VDC/57.2VDC
Low Voltage Protection Point 10VDC/20VDC/30VDC/40VDC
Temperature Compensation coefficient -3mv/°C /cell (25°C  vef)
Peak Conversion efficiency 98% (MPPT Efficiency 99%)
Max Charging Current 45 amps continuous @ 40°C ambient 60 amps continuous @ 40°C ambient 80 amps continuous @ 40°C ambient
Radiating mode Fan cooling
LED indication Systematic operation, LV indication, LV protection, over charge protection, short circuit protection
LCD display Charge voltage, charge current, voltage of storage battery, capacity of storage battery, output current
Alarm Protections PV array short circuit, PV reverse polarity;Battery reverse polarity, Over charging protection;Output short circuit protection;Low voltage protection for storage battery.
Mounting Wall mount
W*H* D(mm)/Net Weight(kg) 167.6 x 257.1 x 82.9 mm /3kg
6.6 x 10.12 x 3.26 Inch / 7Lb
Environmental Rating Indoor
Operation Temperature Range -25~55°C
Ambient humidity 0~90% relative humidity(non-condensing)
Altitude ≤3000m


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