Home editor's blog on going solar

Musings on going solar

solar panels with head shot of SCD editor superimposed on themIn the Editor’s “On Going Solar” blog section, I’ll write about experiences I have with going solar. While many of the entries will involve a description of the process of going solar, some will also be general musings on going solar. The entries about my, really, our – my wife and family are also part of the whole experience -- going solar experience will be more informal and more current than the articles about my solar-charged driving experience and my general experience going solar I’ve posted to the “SCD primer” and “Going solar” sections. I hope some of you find at least some of my musings on "going solar" interesting, potentially useful, and, ideally, thought-provoking.

Solar PV pick: Microinverters over central inverter

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Our SMA Sunny Boy 6000 central inverter as it was being installed by REC Solar workers in June 2010.

editors-blog-entry3I'm definitely a fan of microinverters, or tiny inverters -- inverters, which convert the DC electricity produced by your solar panels to the AC electricity needed, are necessary components of all solar PV systems  -- installed on the back of each solar panel. Studies have shown they are more efficient than central inverters.

Moreover, unlike central inverters with microinverters you don't have to deal with the silliness of solar panel "strings". Strings mean that the lowest performing panel on a "string" of panels, or a certain number of panels that must be linked together for electrical reasons that I'm not going to get into here, drags DOWN the production of ALL of the other panels on that string. 

In fact, if we had to do it again, I would definitely go with a microinverter rather than a central inverter based system (we have a 5.59 kW system with a SMA Sunny Boy 6000 central inverter).

Microinverters were really only beginning to take off three years ago when we had our system installed, but they've grabbed more and more the market here in the U.S.

Read more...

 

Up & down gas prices not best scenario for EVs

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Gas prices are spiking again in the U.S. -- but given the pattern of up/down, up/down gas prices over the past four years in the U.S., apparent in this chart, a lot of people are probably banking on prices coming back down again. [Graph Credit: United States Energy Information Administration]

editors-blog-entry3It’s a bit of a truism that every time gas prices rise in the U.S., electric car advocates shout: “See, we told you so!”

Heck, I confess to being part of the shout about gas prices crowd, and, yes, I’ll even cop to smirking a bit when gas prices go up. Any true EV advocate who claims he/she doesn’t smile, at least a little bit, when gas prices go up in the U.S. isn’t being truthful.

In fact, I’ve written more than my fair share of these types of the “sky is falling”, or, really, sky high gas prices are “skying”, as in skyrocketing, during the past 3 ½ years on SolarChargedDriving.Com. Check out a few of these entries, for example --> ‘Say goodbye to high gas prices forever’, ‘Say no to high gas prices: Fuel an EV with home solar’, ‘Why rising oil prices make me smile.’

As time has progressed, I’ve come to realize this approach may not be the most effective one, and may even be counter-productive.

How so?

Read more...

 

Germany has better approach to solar than U.S.

german-solar-graphiceditors-blog-entry3There's not much more to add to this 'infographic' that came across my Facebook newsfeed recently: Germany, with a national feed-in tariff tilted toward individual solar installations, is leaps and bounds ahead of the U.S on solar.

And, as this infographic notes -- and, as I, myself, have noted in previous blog entries, there's plenty of irony in this fact.

After all, the U.S. likes to cast itself as the world leader in free-market-ism and the biggest champion of the small (business) guy. But when it comes to electricity production, we're all about helping the big guys and utility monopolies, or just the opposite of what's going on in "socialist" Germany.

Go figure...

 

Home solar means an unthinkably low utility bill

xcel-bill2editors-blog-entry3Ho, ho, ho, ho! Our entire utility bill (gas + electric) for December 2012 was – drum roll, or, more appropriately put, a big Santa high five, please -- $36.99!

This in a household of four people and for a house that’s 2,100 square feet (if you include the furnished basement), and which is located in Aurora, Colo., not exactly a balmy climate at this time of year. In fact, according to our December 2012 Xcel Energy bill, the average monthly temperature was 32 degrees Fahrenheit.

Read more...

 

Should we feel guilty about heating with solar?

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As this monthly solar production vs. home electric use table produced by TED shows, November and December 2012 were off the charts for us in terms of our electric use. Of course, our natural gas use was also way down -- because we're primarily heating with electric, not gas.

editors-blog-entry3We burned though 1,600 kWh of electricity and generated just 300 kWh of solar electricity in December. This represented the second straight month in which: a) we used more than 1,000 kWh of electricity; b) our electricity use far exceeded our solar-electricity generation.

Yes, all of this extra use is planned: Since we don’t have an EV yet, we’re trying to do as much of our winter heating as possible with six wall-mounted eheat.com electric heaters while using our central, natural gas burning, forced hot air furnace as little as possible.

We’re taking the extra electricity we’re burning out of a “bank” of more than 10,000 extra solar-generated kWh we’ve produced in 2 ½ years with our 5.59 kW solar system.

Read more...

 
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