An Eccentric Anomaly: Page 22

Ed Davies's Blog

AC Coupling

Most off-grid houses (and small boats) use DC coupling for the electrical system where power sources (PV panels, wind or water turbines, alternators, generators, etc) feed DC electricity to the battery via a charge controller. The DC from the battery is then either used as such or converted via an inverter to AC at normal household voltages for use.

A few, though, use AC coupling where the power sources feed their output as AC into the “mains” wiring to form a sort of mini-grid with the power flowing in and out of the batteries via an appropriate inverter which also acts as a charger.

I'd assumed I'd just use DC coupling for my house but I'm gradually coming round to the idea of using mostly AC coupling. I'm not really clear about some of the details so here's a snapshot of my thinking to help make things a bit more concrete.

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Hibernation

After having spent the second half of December at home busy recovering from Covid or whatever it was, I've more-or-less continued the theme this year. So far I've only been out six times.

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Tonga Eruption Detection

Volcanic eruption detected in Dunbeath!

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Covid?

Dunno, maybe I've got Covid.

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North Roof Done

Finally, I've finished the north roof.

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North Roof

As previously mentioned I've been interleaving work on the north and south roofs, mostly as the wind indicated. I don't seem to have many pictures for the north roof but here's a quick summary anyway.

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Miscellaneous Eye Candy

Some miscellaneous pictures which don't fit anywhere else.

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Corrugated Roof Sheets Round Velux Windows

After I abandoned my first attempt at fitting the roof sheets under the south-roof Velux windows it took me most of September to come up with an alternative plan I was not too unhappy with.

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