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2m antenna and Micro Inverters
On 8/20/2015 5:40 PM, Tom wrote:
Yes, but Enphase Microinverters shut off, SolarEdge inverters shut off, for just that reason. This makes them certifiable. They are probably the better ones for my application. You mentioned it was possible with more equipment. Can you elaborate? I want to primarily be on the program, but when my grid goes down for any serious length of time what more equipment would you recommend me considering that both meets the code, made in Ontario and is tried and true, suitable for the program. I don't want knock offs or copies, or offshore stuff. Must be certified and meet the code, etc etc, and not so complicated it needs NASA Satelite Engineers to approve my drawings. Thanks Tom, Yes, there are systems which can operate independently from the grid. Typically they operate like a zero time switchover UPS - your house actually runs off batteries and/or rectified and filtered AC, through an inverter which generates the 60hz. But if you're talking 200A service at 230V, you're talking over 45KW maximum drain. An inverter which generates sine waves with that much power (not to mention the batteries required to support it) is quite expensive (and generating clean sine waves isn't all that efficient). Sure, you don't need it all of the time - but you need to be able to supply the peak draw. As Jim hinted - you have to isolate the output of your inverter from the power lines, even though they both feed the same equipment. Otherwise, when you lose power, your inverter is going to try to supply power to the whole neighborhood. Not only would that burn out your inverter, but it could electrocute someone. That's a big reason most backup systems use diesel generators. They are much more cost effective and will run as long as they have fuel available. Plus they generate pretty clean sine waves. Switchover is on the order of a few seconds; if that's too long one or more UPS's for critical systems can keep power up for that short of a time. -- ================== Remove the "x" from my email address Jerry, AI0K ================== |
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