Best MPPT Solar charger controller? Under $250

[erod707]

I want to invest in a MPPT solar controller. I have been looking at Blue Sky and Morningstar.

http://www.blueskyenergyinc.com/products/details/solar_boost_2000e/

http://www.morningstarcorp.com/en/sunsavermppt

What do you know about these two companies? Which one would you recommend?
And can someone explain to me what load means on a solar controller?

[Mike90250]

Blue Sky has a more limited input voltage range.


The LOAD outputs on a charge controller are only for small loads, that you woud have on at all times ( a bright green LED indicating All OK ) when the battery voltage gets too low (80%), the LOAD is cut off, to prevent 100% discharge of the battery. then your green OK light is gone, and you know something bad happened in the power shed on the far side of your lot.

[erod707]

What do you mean limited input voltage range?

[Mike90250]

http://www.blueskyenergyinc.com/prod...r_boost_2000e/

http://www.morningstarcorp.com/en/sunsavermppt

Limited:

MS MPPT: 15A output 75V max PV input 400W (12 or 24V systems)
BS2000e : 25A output 30V max PV input 300W

the 30V input limit, really narrows your choices for panels to drive it with, and the MS MPPT can manage 400W into a 24V battery system.

If you are not locked into a battery voltage, the 24V is the prefered method for the same power, less system losses.

[erod707]

perfect and again this is for a 12v system thanks