Uh, 150 solar panels @ say 300w each will generate 45,000 Watts at noon on a sunny day during the summer.  So during that brief moment each day (in the summer months only), you can power 225 GPUs that consume 200 Watts each.

So unless you farm is floating in space with sun 24/7, you will only see a fraction of that power on an annual basis.

I currently have 128 panels with a total output of about 34,000 Watts at noon on a sunny day during the summer.  Last month I generated a total of 2,151 kWh from this array.  There were 28 days in February, so that works out to an average production of 77 kWh per day, or 3,200 Watts per hour.  That in turn translates into 16 GPUs @ 200 Watts.

During March, I have had a few days where I generated 175 kWh, which translates to around 7,300 Watts on a 24 hour average, or enough to power 36 200W GPUs.

Not sure why you want to go off grid.  It is MUCH more economical to be grid tied, especially if your POCO offers net metering.