Products > Charge Controllers
A charge controller is used to keep the voltage across the battery within acceptable limits. The charge controller automatically regulates, stops, or diverts power when batteries become fully charged. Charge controller capacities range from 4 A to 100 A and multiple charge controllers can be used in parallel for larger systems. Some charge controllers offer additional features including charge status display, data logging, automatic equalisation charging, generator starting, and even lighting control.
The simplest charge controllers disconnect the power source (solar) when the battery reaches a set voltage, and turn it on when a low voltage set point is reached.
Pulse Width Modulated (PWM) charge controllers turn on and off very rapidly, maintaining the batteries at full charge voltage, which results in quicker and more complete battery charging.
Maximum Power Point Tracking (MPPT) charge controllers optimize the voltage of the PV array to maximise total power output then convert that to the correct voltage to charge the battery bank. This process significantly increases the power from a solar array, particularly in low temperatures when battery voltage is significantly below the PV array voltage. Most MPPT charge controllers work with higher array voltages, which can greatly reduce the required wire size between the array and the charge controller. Whole more expensive than PWM controllers, MPPT charge controllers can boost system performance by up to 30% making them very cost effective.
MPPT Charge Controllers
The table below shows our selection of MPPT Charge Controllers. Click through on the model number for more in-depth detail.
Please make use of the free on-line String Sizing Apps to calculate solar array sizing.
MPPT Charge Controllers at a Glance
Max Output Current
Maximum Recommended PV Array Size (Watts)
Max PV Array Voltage (Voc)
96 A @ 12 VDC
94 A @ 24 VDC
86 A @ 48 VDC
79 A @ 12 VDC
78 A @ 24 VDC
76 A @ 48 VDC
61 A @ 12 VDC
62 A @ 24 VDC
55 A @ 48 VDC
30 A @ 12 VDC
30 A @ 24 VDC
30 A @ 48 VDC
PWM Charge Controllers
The table below shows our selection of PWM Charge Controllers. Click through on the model number for more in-depth detail.
It is important to note that PWM charge controllers have limited voltage correction capabilities and should only be used with 36 or 72 cell modules in series or parallel to match the battery voltage.
PWM Charge Controllers at a Glance
Maximum Output Current
|MidNite BRAT||20A +10A Load Control|
|Morningstar SG-4 SunGuard||4.5 A|
|Morningstar SK-6 SunKeeper||6 A|
|Morningstar SK-12 SunKeeper||12 A|
|Morningstar SS-6-12V SunSaver||6 A|
|Morningstar SS-6L-12V SunSaver||6 A|
|Morningstar SS-10-12V SunSaver||10 A|
|Morningstar SS-10L-12V SunSaver||10 A|
|Morningstar SS-10L-24V SunSaver||10 A|
|Morningstar SS-20L-12V SunSaver||20 A|
|Morningstar SS-20L-24V SunSaver||20 A|
|Morningstar SL-10-12V SunLight||10 A|
|Morningstar SL-20L-12V SunLight||20 A|
|Morningstar SSD-25 SunSaver Duo||25 A|
|Morningstar SSD-25RM SunSaver Duo with Meter||25 A|
|Morningstar PS-15 / M ProStar||15 A|
|Morningstar PS-30 / M ProStar||30 A|
|Morningstar TS-45 TriStar||45 A|
|Morningstar TS-60 TriStar||60 A|
|Morningstar EC-10 / M EcoPulse||10 A|
|Morningstar EC-20 / M EcoPulse||20 A|
|Morningstar EC-30 / M EcoPulse||30 A|