Electrical background: Zip. Nada. Zilch. Used How-to books to wire my house. Used how to guides to wire up original solar array and OUTBACK system. Outback is 48v. Original system was 640 watts. Keeping that system. New system is also 48 volts (by label) but made from different panels and even has different voltages. So, I was going to wire up another charge controller to handle the second system. Even tho the batteries are three banks (220 ah each), I was going to 'pulse' in the 'charge' from the old system into the front of the battery bank and MPPT charge the 'back end. Whatever the different 'types of charge were, they would be 'cushioned by the battery bank. I think.
Mountainous terrain. Solid rock, kinda. Ocean. Remote - beyond rural. Closest summer neighbours are half a mile but closest all-year neighbours are two miles.
My house is typical off-grid stuff. CF lights. Propane appliances. The odd drain from the washing machine or the monitor/satellite/computers. I can live 'off the sun' in the summer with just the old system (640 watts) but I expect to live off the sun for the spring and fall with 2100 watts.
Building codes hardly apply. NO one cares. No house insurance available. No roads. No 'grid' of any kind. Having said that, I built to exceed all codes so that part is NOT a problem.
When I say, "I built...", I mean: my wife and built it all ourselves. No help. Except this kind of thing - a forum.