Hail hail LED

I did it again! Left that damned powershed light on all night.

In the days of 2-battery power storage and CFL lighting, this was a serious and possibly even mortal sin. Now it’s rather more venial, probably worth no more than ten Ohm’s Laws and a trip out to throw the switch. But it’s still annoying.

Every morning, first thing before I turn anything on, I check the battery voltage. As I said this is more a vestigial habit now than a necessity, but I still do it and I still write the reading in my daily ledger…

ledger
So when I get a lower-than-expected voltage reading, I start wondering why. During the snow and weather of a few days ago I was getting 12.3 volts which is a solid two tenths lower than it should be, and I should have been more proactive about the cause. All was explained when I saw that I’d left that damned powershed light on. Again. For days.

But that was the closest my oversight came to doing any actual damage. This morning I went outside and turned the thing off, then went back to see what effect if any it had on the readout…

125
And in a few seconds the reading went right back to what it should have been. So two exterior LEDs, left on from dusk to dawn, barely removed the surface charge from two worn deep cycle batteries*.

Which ain’t bad. Non-dimmable LED lightbulbs becoming hermit-affordable is one of the best things to happen to my little power system.


*The 12-volt lighting is currently on a separate 2-battery bank unconnected to the inverter, just because I didn’t want to throw those batteries away.

About Joel

You shouldn't ask these questions of a paranoid recluse, you know.
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5 Responses to Hail hail LED

  1. Mike says:

    I remember the days when LEDs cost an arm, leg and a torso. Now I get them at Costco for a song. As of last December, all the lighting in my home is LED and I love it. The makers have managed to replicate sunlight, so there’s no serious eye strain and my power bills are down a few percent. Yes LEDs are a good thing.

  2. Kentucky says:

    Assume you’re keeping the other batteries charged up, right?

  3. Joel says:

    Of course! The four-battery bank runs the inverter and is powered by both charge controllers.

  4. Judy says:

    How hard would it be to wire a second light on the outside of the building wired to the same switch as the light inside? Dark rolls around you would see you left the light on.

  5. Joel says:

    Judy, that was actually my first thought because it would be very simple. But I only had two other exterior lamps and had other use for them, and also that’s kind of a kludge. A timer switch seems more in line with what, you know, normal people do. 🙂

To the stake with the heretic!