Use of MNPV8HV 4X Or3 in grid tie

Started by EW Zuber, April 26, 2022, 04:02:48 PM

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EW Zuber

All the systems I have designed previously have been off grid so I have a few questions about using disconnecting combiners on a grid tied system.
I want to combine two strings of 5 panels each in series (10 panels total). The REC panels have a open circuit voltage of 48.8 VDC X 5 = 244 VDC. Probably a tad higher at -30°F that we get in winter. (Temperature coefficient of VOC: -0.24 %/°C)
Looks like the MNPV8HV 4X Or3 would be the combiner to use with a Fronius transformerless grid tied inverter. It appears to offer the breaking of both the negative and positive circuits for two strings. Correct?
(6) Solar World 175 watt, (14) Arco Solar 33 Watt, (15) REC 250 watt, 2KW Whirlwind turbine on 85' rohn 25 tower, Outback VFX 3648, Outback FM80 and Midnite Classic 150 w/WBJR, ( 8 ) Trojan L-16REB,