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Originally Posted by Xringer
Hi Rex,
I just looked at some of your recent posts over on wind-sun. Wow, that's a big system!
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I bought the largest that would fit on my south facing roof. It's an all electric house and I have an electric car. So I'll probably still end up paying for some electricity, but the gas money saved will easily cover it.
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Anyways, SSRs from China work the same as the SSRs I've used at work.
Bolt them down on some metal and they run pretty cool. I've never had one fail.
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I have explored several ways of controlling the enphase inverters and SSRs seem to be the best. I finally bit the bullet and had the PV installer run 11 strings of 4 panels to an ac combiner panel. That will allow me to use AC SSRs more easily and avoids the DC side of the PV panels completely.
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The current sensors aren't cheap, but you can find them on Ebay.
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I have plans to AC couple the micro inverters. The combination of the current sensor switch and the SSRs may work. Still waiting for the electric company to commission the system before I get to ambitious making changes.
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Have you seen IOTA auto-change-over relays??
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You are way ahead me! I looked, briefly at ABT switches and was put off by the cost. These beauties are sending me back to re-evaluate my plans.
Thank you again!
Rex