Grid tie with Export Wind/Solar with Growth
Grid tie with export of excess, 240vac single phase: I am starting out with 1 each 500 watt rated wind turbine (24vac rectified to 24vdc). At 50 mph the wind turbine has been documented to produce 45 amps so we have to take care of this situation also. I am planning on adding 3 more of the wind turbines and Solar panels up to maximum of 4000 watts combined output of wind and solar as finances permit. I also have to take into consideration when the charge controller offloads the wind turbine what to do with the power generated to not overspeed the wind turbines if the utility grid fails (which would probably happen in high wind situations). What charge controller, 240vac single phase grid tie inverter, battery combination, monitor equipment, etc do you suggest as not to waste initial investment and use the same equipment later with the completed larger system. Would it be better to put a transformer after the wind turbines to boost the output from 24vdc to 48vdc so 48vdc solar panels can be used? Is 48vdc that much better than a 24vdc system? Can the system also serve dual purpose and be used to generate stand alone off grid if the grid fails for an extended period of time like after a Hurricane with the same inverter? :grr Is it better to use 2 smaller inverters and tie inverter outputs together? Is there a way to limit the export if required to keep batteries charged? My day loads are normally 4800 watts (I have seen 12,000 watt peak) and night 1,700 watts. I have been monitoring utility power usage with a TED (The Energy Detective) unit. I also have a portable generator (120vac or 240vac outputs) that can be used to charge the batteries with the right charger if required during outages.
(5.1kw Solar/SMA SunnyBoy 5000 GT String Inverter),( 5.4kw Solar/GT Aurora 300 MicroInverters), (3kw Solar/Xantrex XW6048 Hybrid Inverter with Xantrex XW60-150 MPPT Charge Controller with 3 strings T-105 Batteries (48VDC)), (32 SqFt Solar Drain Back Water Heater), (10kw Bergey Wind Turbine/12kw GT PowerSync Inverter).