6 Home Solar Myths Debunked

Hearing mixed messages about solar electric power? We dig into some energy facts to help refute six common renewable energy myths and reveal the many advantages of home solar technology.


| April/May 2016



Solar Panels

Solar panels prove an aesthetically pleasing addition to any home.


Photo by Shawn Lessord

Despite the many advantages of solar electricity, including its recent cost effectiveness, some remain skeptical about photoelectric technology. A number of common misconceptions fuel this skepticism. In this piece, I’ll debunk six of these, most importantly those regarding the cost and reliability of home solar electricity. Let’s get started.

1. There’s Not Enough Sunshine In My Area for Solar

America is bathed in sunlight. Solar works, even in the Pacific Northwest or the Northeast where cloudy days are more frequent — you’ll just need a bigger system. Photoelectric systems produce optimally in spring, summer and early fall. Bear in mind, you don’t need a crystal-clear, blue sky to generate electricity. Even on cloudy days, solar electric systems easily generate 10 to 20 percent of their full capacity.

2. The Cost of Solar Is Too High

The costs associated with home solar electric systems have plummeted in recent years, mostly because of industry streamlining. In fact, solar has never been cheaper.

Moreover, solar electricity’s lifetime cost per kilowatt-hour (kWh) is significantly cheaper than other North American utility options, in part because of the federal Investment Tax Credit extension, which is now good until 2022. (See http://goo.gl/F3iPHt for more on tax credit extensions.)

In the Midwest, electricity from a solar electric system currently costs around 6 to 7 cents per kWh with the 30 percent credit, based on installation costs. In sunnier regions, such as the West and Southwest, the cost of electricity from a solar electric system is even lower. For comparison, large, investor-owned utilities typically charge 10 to 17 cents per kWh, sometimes more.

Even without the federal tax credits, solar electricity is still less expensive or on par with energy costs from

envirostudiesdotnet
4/9/2016 2:07:54 PM

The 2-year method mentioned in this article is experimental (using fluidized-bed reactor) and damages the manufacturing equipment. State of the art scalable manufacturing of that type of PV requires 3 years of electricity. Scaling up would cause national electricity shortages since there are not enough hydro power dams. The type of solar electricity that is cheap and practical are solar trough plants, which like dams last indefinitely and generate millions or more times the energy required to manufacture, and are financed like dams. For an example search for P131256 at worldbank.org, built near a dam. PV manufacturing plants could be connected to such power plants, but just sending the cheap electricity from those plants straight to consumers saves costs and requires less plants to be built.


envirostudiesdotnet
4/2/2016 5:08:55 PM

Solar photovoltaics (PV) is not ready for widespread use and may never be. Further R&D is needed. PV panels wear out, especially fast in dry/sunny climates, and cannot be recycled. Unused power must be dumped by utilities that are required to buy it from PV users without being able to use it. Meng Tao, Terawatt Solar Photovoltaics, p. 77, states: "Recycling of solar modules...will become obvious in about 15 years when today’s installed solar modules have gone through their life cycles and start to scatter along highways or pile up in junk yards." Manufacturing PV causes pollution and wastes energy, using a lot of electricity. Tao (p. 74) states: "To contain cost, many polycrystalline-Si and Si wafer producers place their factories near hydropower plants for cheap electricity. This strategy works only when the solar cell industry is small, since the availability of hydropower is limited." Small scale PV is more practical, can be used for low-power portable devices, smaller water pumps that run all day instead of intermittent pumps, heat transfer liquid pumps for solar water heaters, etc. PV may also be used for remote locations that would otherwise not have any electricity.


patriot1st
3/18/2016 10:15:04 PM

Well here is a factual example of just how ready solar electrical generation is for prime time. http://constitution.com/solar-plant-got-1-2-billion-feds-2011-now-look-well/ Extremely high cost of production and very low output, coupled with billions of dollars of taxpayer money = possible closure! This is no myth, this is just cold hard fact!! Solar is good for cooking and heating, but poor for electrical generation!


patriot1st
3/11/2016 2:12:23 PM

Not any thing like a really poorly written article to put one off towards solar! Where are the Myths being Debunked, as the title states??? All that is written is some vague conjectures about power, with nothing in the way of supported facts! I only pay .075576421 cents per kWh per year. At a range of "6 to 7 kWh", it will only take me, oh forever to pay back the system cost!!! Not to mention none of the panels are actually rated for more than 20-25 years by the installers. Shorter in the high UV areas and high snow load areas. The costs of inverters is glossed over also, they are not cheap! At a cost of a few thousand dollars for a new grid tie inverter, along with installation, that is a major expense, which adds a significant amount to the cost per watt!! While PV solar is making strides, it is far from cost effective for most people. If one needs to include the government subsidies, money stolen from other people, to make it cost effective, you have a serious problem in the making! Solar heating makes sense and can be done cost effectively most places around the world. Solar PV is not really ready for prime time and this article shows nothing to indicate it is yet!


jamesv
3/11/2016 9:57:27 AM

Efficiency has nothing to do with the viability of solar PV. It is all about cost. If costs are going down, it might be better to wait rather than get a high priced system now that you will be stuck with for many years. I built a solar DHW system over 20 years ago, and I'm sure it has paid me back well over the years. That was low hanging fruit. Still haven't gotten a PV system.






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