There has been a shaking out period going on for a while in the solar industry. Big names like BP and Bosch have dropped their solar divisions, while other companies have just gone under like Konarka and of course, Solyndra (which never really was that big).
Well which manufacturers have not only held on, but are the most popular for solar installations in America’s largest solar market? We’re only looking at the last 2 years plus the first quarter of 2013. So that’s Jan 1, 2011 to Apr 17, 2013.
So, the Sun shines on Earth and in that sunshine there is energy. Plants convert that energy into mass because energy is mass. E = mc2. Energy equals Mass times a constant (which is not important here). We eat the plants for energy, or we eat animals that eat the plants. That’s how we survive.
Well, solar panels are humans’ attempt at making “plants” that convert the Sun’s energy into energy we use – to heat, chill, or light our homes, to power our TV’s, fridges, computers, etc. Well, it’s not easy converting that sunshine into energy we can use. And as it turns out, most solar panels convert 12-15% of the Sun’s energy that falls on the panel. The Sun dumps ~1,000 W/m2 at sea level on a clear day (source: wikipedia). Read the rest of this entry »
So you’re thinking about installing solar on your roof in NSW or Queensland, huh? The Aussie government promotes ‘green initiatives’ and will help you financially, but they haven’t made it easy for you.
Solar Credits and STCs
First of all, you get ‘Solar credits’ for installing eligible solar systems in Australia. The credits are simply multipliers for renewable-energy incentives called STCs (or Small-scale Technology Certificates). What the heck is that? Well, it’s probably like a coupon or a gift certificate that you can redeem for cash (or tax credits), right? Wrong. They’re more like green energy stocks that are traded among registered agents or on a specific market called the ‘Clearing House’. What the heck is a registered agent? Maybe your installer. But maybe not.
Read the rest of this entry »
Think solar can’t pay for itself? With the right combination of State incentives and expensive electricity rates, a solar PV system can have a payback period of 10 years or less. Here are ten US States with a solar payback of 10 years or less.
1. Massachusetts – 4 years
2. Hawaii – 5 years
T-3. New Jersey – 7 years
T-3. Maryland – 7 years
T-3. Louisiana – 7 years
6. New York – 8 years
T-7. California – 9 years
T-7. Ohio – 9 years
T-7. Delaware – 9 years
10. Arizona – 10 years
If you want to know how much solar it could cost to go solar in your state? Check out the infographic below from 1BOG.org to see the average cost to go solar in your state. Then check out how much you can save each month, over 20 years, and the average payback time for solar.
Stop searching for the ‘best’ or ‘most efficient’ solar panels. Stop trying to compare brands. The solar panels don’t matter. Obviously they matter in terms of the solar pv system as a whole, but which panels you use, isn’t important. Let me explain.
1. All solar panels are warrantied for 20-25 years, which means the manufacturer guarantees the panels will still be producing at least 80% output 25 years from now. It’s the same for all brands. Don’t believe me? Ask the guy selling them. Read the rest of this entry »
(*Calculator at bottom)
Wanna know how to choose the best solar panels? It’s simple: find out which ones give you the most electricity for the cheapest price. Let’s call this ‘solar value’.
Well, how do you figure out which panels give you the most electricity? Do I need to know which panels are the ‘most efficient’? Nope. Efficiency is not the same as output. Efficiency is output per area. You should only care about output. Let your installer worry about the area. Read the rest of this entry »
So, you’ve got a few quotes from solar installers and want to know which solar power system will give you more energy / output / electricity. Let me teach you how to calculate solar output like the pro’s. This way you can double-check their quotes to know you’re getting a good deal.
Step 1: Grab your solar quotes and look for the specific solar module name and how many solar modules will be installed. Make sure you know the exact panel. Circle the panels and how many. Ex. 20 x SunPower SPR-200-BLK-U.
Then find the exact solar inverter in the estimate. This might be SMA SunnyBoy, Xantrax, Fronius, or Enphase. Circle this too. Ex. SMA SB4000US (240V).
One great thing about the California Solar Initiative (CSI) is that they keep pretty good data on the solar in their state. Thankfully it’s the US State with the most solar installations (4 times as much as 2nd place, NJ). So we can use CA’s data to find out which solar panel brand is the most popular.
So, now that we know which solar panel brands are being installed the most, let’s see how difficult it can be to compare solar panels.
Solar panel efficiency is simple, but there a few things you need to understand.
There are 3 main types of solar efficiency.
1. Module Efficiency
2. Area Efficiency (Density)
3. Cell Efficiency
1. Module efficiency measures how well a solar module (aka panel) converts the Sun’s energy into usable energy. If the Sun dumps 100 Watts of energy onto the module and the module spits out 15 Watts, the the module is said to have 15% module efficiency (15 W / 100 W = 0.15 = 15%). If you want to brag to your friends that you have a top tier efficiency panel, care about this. Read the rest of this entry »
To simplify solar efficiency further, we have divided all modules into 5 tiers based on their efficiency compared to all other solar panels. Now installers and consumers can easily communicate about module efficiency.
Are the solar panels in the most efficient tier (Tier 1) or do they have average efficiency (Tier 3)? If modules are in the least efficient tier (Tier 5), let’s hope they’re cheaper than the modules in the above-average tier (Tier 2).