How to best utilize MPPTs

[zanydroid]

The other reason I was going with these inverters is because they're pretty highly rated. What 18 KPW inverter do you recommend going with?

What do you mean by 18KPW?

18kpv is a EG4 product name.

 

[Tigersun411]

What do you mean by 18KPW?

18kpv is a EG4 product name.

 

[Tigersun411]

Okay got you. I've seen the EG4 inverter signature solar. So many acronyms just figured it was another one for a hybrid inverter.

 

[Tigersun411]

Okay so I did the math based off of temperature coefficients from my area and the data sheets.
It looks like it would be three panels minimum and 14 panels maximum per MPPT. Thanks for all you guys's help. Now I just need to make decisions.

 

[n2aws]

string panels together that get shade at the same time... If had 2 MPPTs, I'd go left side/right side

You also need to make sure you have enough panels in each string (series) to meet your MPPTs minimum 'start up' voltage

This is the right answer.

If shading is a concern, try to put the panels that get shaded on the same time in 1 string, on their own MPPT. Making sure to have a string large enough to wake up the MPPT controller. If you have multiple strings of shaded panels, try to isolate them. Each string of shaded panels gets their own MPPT. The unshaded can all share an MPPT assuming you don't go over wattage/voltage/amperage specs.