Recent content by garybryan33

Using my case as an example, using freezing as a record low, I should keep my solar panel array at or below 409 volts?

I am a bit lost with the difference between the DC input range and the full-power MPPT voltage range. If I understand, the 18Kpv can support intake voltage from an array up to 600 volts.

The worst-case scenario brings me within 19 volts of max. What is the consensus? Total string OC voltage: 450.09 Nominal maximum power: : 4050 Worst case temperature: -1.1 Temperature coefficient (Voc): -0.27 Temperature coefficient (Pmax): -0.34 For these, your: Total worst case...

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

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

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...

Does the ground have to be of the same size?

The EG4 18kv will live In the carport, 170 feet away from the critical loads panel it will feed. The subpanel will have a 70-amp (80-amp if possible) main breaker. Do I need #2AWG or would #4 AWG for the approx 170tf run? A bit confused on whether the max voltage drop of 3% is for continuous only.

Live and learn! Thank you

The 18k manual calls for DC disconnect and suggests the IMO. I am also running the Tigo 2f's with the 18K built-in RSD

I was considering that option, Thanks for the input.

In short, I need to install these outside the structure

NEC dictates DC circuits are to be in metal conduits within a structure. The IMO DC disconnect is Plastic/pvc, do I need to install these inside a metal enclosure? I planned to mount 3 DC disconnects on top of a metal enclosure using chase nipples. Run my PV wire to the metal enclosure via a...

Front ISC: 13.96 Rear: ISC 9.84 Do you add the front and rear values or is the amperage of the panel determined by the lowest current value? Thank you

At that point, we were discussing liquidtight Flxible MC. The run from the roof to where it goes into the structure is 10ft. Four feet on the roof and about another 4 feet down the wall.