Why So Many Voltage Variations
I'd like to cut my GRID power consumption to near neutral or even give back some for compensation. But one thing that has struck me as confusing is the variance in system voltages 24V/48V wind, some off grid 12V/24V, while on grid are going up to 1000V DC Fronius (with most in 400V-600V DC input range SMA, OUTback) with a solar array.
Why so much of a spread? Is it to force incompatibility between off grid solar, even wind and on grid systems? Or is it more of an economics thing with cable sizes and costs? Do the high voltage systems actually do a DC-DC conversion back down with a buck converter to increase usable household current before inverting. Can you go grid and still reserve a small battery bank for backup if the grid is disrupted? Or is a backup generator the cheaper way to go?
I was hoping to find a system that would provide an inverter that could run off of many variations of green sources and even provide a backup from battery or a generator option for when there are disruptions on the grid. I can only predict that this will increase with the growth of metropolitan areas. And even the utilities say that they switch power around to limit the disruption for any one group to less than an hour if they can, while killing power in a perfectly clean area.
Is there one vendor that is plug and play with a variety of sources more than the others?