A solar charge controller is used to handle the power from the solar cells to cost the batteries and provide the load within the photo voltaic energy system. The charge controller protects the batteries from overcharging or deep discharging, so as to ensure the security of the batteries, increase the service life of batteries and then enhance the photo voltaic system performance.

So, really it’s price doing more investigation in your solar system for best sizing a correct solar charge controller. It is the important thing for longer life and higher effectivity for your battery bank because the charge controller optimizes the Portable Power Station and voltage coming from your photo voltaic panels to supply greatest charging voltage and present to the batteries.

Most Power Point Monitoring (MPPT) Photo voltaic Cost controller

Up to now, we chosen the solar array voltage to be similar as the battery voltage, and made our calculation based mostly on this. Right this moment, with the presence of MPPT charge controller, we’re capable of have solar array with larger voltage than batteries voltage; due to the design of MPPT charge controller, it converts greater voltage to decrease voltage.

This amazing characteristic enables us to put in small gauge wires at photo voltaic array system aspect than earlier than as when the solar array voltage is doubled, the present can be lowered to the half and then the wire gauge will likely be decreased accordingly, consequently the wiring cost will dramatically cut back.

Even as a result of distinctive advantage of MMPT solar cost controller that has the aptitude of receiving increased voltage from photo voltaic array and dealing with lower rated voltage batteries, you develop into freed from matching voltage condition, and your design develop into open, that’s, you should use totally different design scheme with different material sizes as properly.

How one can size a solar charge controller?

This may be achieved by indicating 2 parameters as following:

1. Cost controller rated present

It’s best to know that the charge controller rated current is referring to its output present not the input present coming from the solar array.

So, suppose you will have solar array of 3500W and its working voltage is 96V and you have batteries bank of 48VDC, so to indicate cost controller rated present, allow us to apply power equation: P = V X I. Then I = 3500/forty eight = 72.91A and by bearing in mind the possibility of solar panels to provide greater energy on account of sunny days or reflecting lights coming from any outer supply like water or snow, we must always apply 25% security issue, then cost controller rated current = 72.91 x 1.25 = 91.13A. Consequently, we should always choose/set up 95A or 100A cost controller on this system.

2. Most solar array DC voltage

The MPPT solar charge controller has max enter DC voltage limit the place needs to be repeatedly bigger than solar array max DC output voltage, its Not allowed to be exceeded, that’s the condition.

So as to realize that, you might be needing to ensure that the open circuit voltage of the entire solar array won’t go above this restrict. Also, it’s best to have a certain margin above open circuit voltage worth to be in protected aspect because the open circuit voltage might enhance resulting from chilly weather. So, we advocate to take security issue of 25%.