Entries Tagged as 'Solar'

Solar Panels

I just did a little exercise in trying to figure out if solar panels would be cost effective for me.

Using my latitude and longitude; NREL and NASA data; along with the ratings from a couple of the manufacturers of the most cost effective panels currently produced it appears that for about $750 I can produce enough electricity to run two [small] compact florescent lights — or a little less than $30 in electricity per year (at today’s rate).

So considering the energy and tax savings the panel couldn’t pay for itself in ten years (and that’s just the panel, that doesn’t include the batteries, inverter, installation, etc).  Plus, I suspect it’s unlikely that a solar panel would last ten years here.

I’d say that solar panels have to increase in cost/performance by a factor of roughly 2x before they’d be feasible here (and we get quite a bit of sun).

I’m always on the lookout for ways to be a little more “green”; but I also believe that any solution needs to be sustainable; and I’m sure if I consider the impact of the production of the panels into this “equation” I’m going to find [here] that solar panels really aren’t that “green”.

I’ll have to keep looking for other options that might be more effective.

Originally posted 2009-08-13 01:00:36.

Solar Lighting

I’ve been looking at several solar lighting products to potentially light my driveway, my walkway, and areas.

The first thing you notice is that prices are all over the map — for products that have very similar specifications.

You will find that some of the products have plastic housing, and some have aluminum (or even stainless steel) — but interestingly enough, that doesn’t seem to track their prices.  In fact one of the least expensive models for driveway/walkway lighting I’ve found is in a stainless steel case (now you do have to buy a six pack, but that’s actually about the right number even for short driveways).

For area lighting there’s a huge different in styles; and these are much harder to compare.  The biggest disappointment thus far with the area lights is the amount of light (Lumens) that they produce — they’re so low, in fact, that they seem like they’d be fairly useless without a backup light (run from AC).  In fact since I can run AC to all the locations I want area lights I’m considering just putting in motion/photo sensors and using outdoor LED lamps (that will use electricity, but it’s fairly energy efficient, and produces much more light).  One thing’s for sure, if you like the light your HID (like the sodium lamps I have) gives off, you’re not going to be happy with what you can get from a solar lighting system (or even an LED lamp).

I’ll do a little more “testing” and provide some brands (and where I found them) that you might want to consider; but keep in mind that everyone will have a slightly different set of requirements and there’s likely not going to be one model that’s right for every need.

If you want to buy something right away; make sure that you shop several different vendors before you decide — it’ll surprise you how much essentially the same item varies in price; and the “discount” stores don’t always have the best price!

Originally posted 2009-08-20 01:00:15.