Price Solar Charge Controller

Choosing the right solar controller/regulator

The PWM is a good low-cost option:

for smaller systems

where the efficiency of the system is not critical, e.g trickle charging.

For solar panels with a maximum power voltage (Vmp) of up to 18V for charging a 12V battery (36V for 24V battery, etc).  

The MPPT controller is best:

For larger systems where the additional 20%* or more energy harvesting is worthwhile

When the solar array voltage is substantially higher than the battery voltage e.g. using house panels, for charging 12V batteries

An MPPT controller will yield higher returns compared with a PWM controller as the panel voltage increases.  I.e. a 160W eArche panel using 36 conventional monocrystalline cells with a maximum power amps of 8.4A will provide around 8.6A at 12V; while the 180W panel having 4 more cells will provide the same amperage but 4 additional cells increases the panel voltage by 2V.  A PWM controller will not harvest any additional energy, but an MPPT controller will harvest an additional 11.1%  (4 / 36) from the 180W panel.

For the same principle, all panels using SunPower cells with more than 32 cells require an MPPT charge controller otherwise a PWM controller will harvest the same energy from 36, 40, 44 cell panels as it does from a 32 cell panel.

Hot Tags: price solar charge controller, China, manufacturers, suppliers, factory, customized, quotation, low price, buy discount, pricelist