Learning knowledgeable information from the previous content is necessary before making the decision to purchase a solar charge controller for your PV system. A comparison table, listing the difference between PWM and MPPT, is also suggested. So, we put their pros and cons together to make it more convenient for you to review.
ProsConsPWM
PWM technology has been available in PV systems for a long time and is a relatively stable and mature technology
They are cost-effective and are affordable for most consumers
PWM can withstand up to 60 amps load currently
Most PWMs have a reasonable heat dissipation structure that allows them to work continuously
PWM comes in different sizes to suit a wide range of applications
If PWM is applied to photovoltaic solar systems, the voltage of the solar panel has to match that of the battery bank
The current load capacity of a single PWM has not been developed and is still only up to 60 amps
Some smaller sized PWM charge controllers cannot be UL listed due to their poor structure design
Some smaller sized PWM do not have fittings of conduit
PWM has signal interference problems sometimes. The controllers generate noise in TV or radios
PWM limits the expansion of photovoltaic solar systems to some extent
It cannot be applied to high voltage off-grid solar arrays
MPPT
MPPT maximizes the conversion of solar energy from PV panels, and the rates can be 40% more efficient than PWM
MPPT can be used in cases where the solar panel voltage is higher than the battery voltage.
MPPT can withstand up to 80 amps load current
MPPT features longer warranties than PWM
MPPT does not limit the expansion of solar panels in the system
MPPT is the only solution for a mixed solar power system
MPPT are more expensive than PWM. The pricing of some models is double that of a PWM charge controller
Since MPPT has more components and functions, its physical size is larger than PWM.
MPPT are more complicated, so most time, we need to follow a guide when sizing the solar array
MPPT solar controller constantly compels the solar panel array wired in strings
