Compare PWM & MPPT Type Solar Charge Controllers.

When assessing which type of solar charge controller to purchase, you need to know about their functionality and features but
it’s also helpful to see a straightforward comparison of your options. To that end, we’ve put together a comprehensive look at
the pros and cons of both PWM Type Solar Controllers and MPPT Solar Charge Controllers for your convenience!

 
Pros and Cons
 
   

PWM Type Solar Controllers
MPPT Solar Controllers
PROS
     – PWM controllers are built on a time
tested technology. They have been
used for years in Solar ystems, and
are well established- These controllers areinexpensive,
usually selling for less than $350- PWM controllers are available in
sizes up to 60 Amps

– PWM controllers are durable, most
with passive heat sink style cooling

– These controllers are available in many
sizes for a variety of applications

     – MPPT controllers offer a potential
increase in charging efficiency up to 30%- These controllers also offer the
potential ability to have an array with
higher input voltage than the battery
bank- You can get sizes up to 80 Amps

– MPPT controller warranties are typically
longer than PWM units

– MPPT offer great flexibilityfor system
growth

 
CONS
     – The Solar input nominal voltage must
match the battery bank nominal voltage
if you’re going to use PWM- There is no single controller sized over
60 amps DC as of yet- Many smaller PWM controller units are
not UL listed

– Many smaller PWM controller units
come without fittings for conduit

– PWM controllers have limited capacity
for system growth.

     – MPPT controllers are more expensive,
sometimes costing twice as much as a
PWM controller- MPPT units are generally larger in
physical size- Sizing an appropriate Solar array can be
challenging without MPPT controller
manufacturer guides

– Using an MPPT controller forces
the Solar array to be comprised of like
photovoltaic modules in like strings