I just ran some numbers:
Here are the specs of a silfab 370W Panel:
If you do 3 in series, it will operate at a typical VMP of around 35.91 X 3 = 108 V. That is getting close to the 120V so the gain of converting to AC will be limited.
HOWEVER: If we assume a worst case temp of -10F (-23.3C), the Voc from 3 in series will raise (25 - (-23.3)) x .279 = 13.148%
So the max Voc is 3 * 45 * 1.13148 = 152.74V..... and that is too high for your MPP input. Even at 0deg F it comes out to 151 volts so
you should not run 3 of these panels in series.
EDIT: I used round trip distance but the calculator needed one-way distance so my numbers were way off. I corrected everything below in purple
I ran a
voltage drop calculator and with a 600ft round trip and 5 sets of 2 panels in series would need
4AWG and would still see a
9.2% drop.
However if you could run 3 sets of 3 in series, you would need
8AWG and get about a
8.9% drop.
Keep in mind that this is just for ONE of the two MPPs. We are talking about a total of 1200ft of copper and with the copper prices where they are this is going to get painful.
Even running a single run for 120V AC will get expensive. You will need 4 AWG and still see a voltage drop of
6.62% ... that means you would be at around
112V at the house,
and some appliances may not like that very much....so the run should probably be 1/0 AWG!!!.
Have you already purchased the LV6048? Can you return it? If you could get something with a higher max PV voltage you would be better off. (Some all-in-ones with high voltages have recently come on the market)