EG4 18Kpv Solar Panel Strings

[garybryan33]

I have 24 panels at the moment, the space where they are installed can handle 30. Is it possible to run 10 panels on mppt 1 and mppt 2 and the remaining 4 on mppt 3 until the other 6 panels are sourced? The manual suggests all 3 strings need to have the same amount of panels. Please advise.

10 Panel string Specs with temp coefficient factored in:

4,600 watts 416 volts 13.96 amps

 

[RinVt]

Each MPPT is superette except for 1 and 2 are together 3 and 4 are superette MPPTs.

 

[garybryan33]

Each MPPT is superette except for 1 and 2 are together 3 and 4 are superette MPPTs.

Correct, I meant to say one string on mppt 1 and the other two on mppt 3 and 4 with the fourth one only having 4 panels

 

[Quattrohead]

Depending on their voltage, it may be too low for the MPPT to work.

 

[garybryan33]

Depending on their voltage, it may be too low for the MPPT to work.

Does that mean each mppt input requires the minimum 140-volt start-up voltage? In this case it would around 160 volts for he 4 panels

 

[EG4_Jared]

I have 24 panels at the moment, the space where they are installed can handle 30. Is it possible to run 10 panels on mppt 1 and mppt 2 and the remaining 4 on mppt 3 until the other 6 panels are sourced? The manual suggests all 3 strings need to have the same amount of panels. Please advise.

10 Panel string Specs with temp coefficient factored in:

4,600 watts 416 volts 13.96 amps

This would be fine. Although, with only 4 panels on the third MPPT, I would make sure that they combine above 141v, or you may not see MPPT 3 utilize the solar production.