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#DIY | Do It Yourself Solar Installations
Mar03

#DIY | Do It Yourself Solar Installations

Solar panels are a smart investment for modern, eco-conscious homeowners, but many people feel inhibited by the cost of installation. Fortunately, materials are starting to decrease in price and installation is becoming more manageable. At Modernize, we are watching homeowners reap the rewards of solar energy while saving thousands of dollars by tackling large scope projects like this on their own. If you are relatively handy, have a Smart Phone or Internet access, and are ready to harness the sun’s abundant energy for your home, it’s time to consider DIY solar installation. Know How Are you comfortable working with wiring? Safety is always the first priority in any home improvement project. Make sure you are well-versed with the dos and don’ts of high voltage wiring before attempting this project. Determining the correct panel placement and angle to harness maximum energy is pivotal. Precision is key to making this project worth your time and money. In addition to handy know-how, you also need to be prepared to navigate compliance laws and obtain permits before beginning your project. If you have the time and resources to do your own research and legwork, you will save the cost of hiring a company paying multiple people to perform these duties. Help From The Internet If you have Internet access, you have help with your installation. There really is an app for almost anything. Search for online calculators to determine the size of the kit that you will need, based on information found on your utility bills.   Measuring Solar Energy Savings Once your solar panels are installed, you will want to see how long it takes to recoup the cost of the materials. While you will save thousands of dollars by installing your solar panels yourself, this project will still be costly up front—but it won’t be long before you break even, and possibly profit from the investment.   After installing home solar, you may be eligible for a federal tax credit, and possibly a state tax credit. Be sure to research your state’s requirements, as some do require that the installation is performed by licensed installers. If these incentives are awarded, a sizable percentage may be recouped right off the bat. Finally, the value of your home will increase substantially with the addition of solar panels. A buyer’s offer may pay for your project in full if the attractive feature of energy-saving, money-saving solar panels sparks a bidding war. Research Make sure you have all of your research done before spending a dime on this project. You want to be sure that you are capable of handling the project in its entirety....

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The U.S.-China Trade Case Determination and What It Means for Solar Installers and Consumers
Jun19

The U.S.-China Trade Case Determination and What It Means for Solar Installers and Consumers

A few months back, we published a post on All You Need to Know About the US-China Solar Trade Dispute and how it might affect solar installers and consumers if the case isn’t settled. Well, a preliminary decision is in. The Department of Commerce (DOC) has made a preliminary determination on June 10th in favor of SolarWorld, the German/U.S. solar panel manufacturer who filed the suit. Before we get into the penalties being proposed and finalized, we should remind readers that there are two parts to this case: Part 1: The DOC Decision The first part, now in the preliminary determination stage, has to do with SolarWorld accusing China of illegally subsidizing its solar panel manufacturers with low interest loans and other cash-related subsidies that allowed Chinese manufacturers to manufacture solar panels and export them to the U.S. (and the rest of the world) at below their actual cost. The 2012 DOC decision determined that was the case and imposed over 23% to 254% in countervailing duties (CVD) on various solar cells made in China. However, Chinese manufacturers got around these tariffs by manufacturing their solar cells in Taiwan and other nearby countries, then assembling the rest of the panel in China. Consequently, this new 2014 DOC preliminary determination now includes solar cells and other basic solar panel materials being made in Taiwan and shipped back to China for assembly and export. So, how much in duties will be tacked on to the price of imported Chinese solar panels? The preliminary CVD varies and depends on the brand: For Suntech solar panels, the tariff is 35.21%. For Trina SolarEnergy, the tariff is 18.56%. For all other Chinese brands, the tariff is 26.89%. That means that the wholesale price of all Chinese-made solar panels coming into the U.S. may be increased by as much as 35.21%, and at the very least, by 26.89%! The DOC will make its final determination by August 18, 2014. But wait, there’s more: Part II: The ITC Decision Remember, we said that there were two parts. Now that the DOC has ruled, their evidence has been handed over to the International Trade Commission (ITC). The ITC is deciding whether China is intentionally overproducing (“dumping”) their artificially inexpensive Chinese solar panels on the U.S. market in order to flood the U.S. solar market, forcing SolarWorld to lower their prices to compete. The ITC previously said this was the case in the earlier 2012 decision, so most industry analysts think they’ll do so again, but now include solar panels and cells from Taiwan. Should the ITC rule in favor of SolarWorld again, then additional antidumping duties may...

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Solar 101: What’s the difference between microinverters and string inverters?
Mar19

Solar 101: What’s the difference between microinverters and string inverters?

If you’re a homeowner or an installer doing residential or small scale commercial solar installations, you essentially have three choices for converting the solar system’s DC power into AC power: You can either go with new microinverters or with string inverters—with or without DC power optimizers. All will work, but there are differences, especially in certain situations. String Inverters: The solar industry standard With residential string inverters, all solar modules are connected in a series circuit to a DC electric cable, which is then connected to a single inverter box mounted on a wall by the home’s main AC panel (as well as to any required DC disconnects). So it’s a very centralized system with a limited amount of labor. Modern string inverters not only convert the power from DC to AC, but also use Maximum Point Power Tracking (MPPT) to deliver the maximum amount of power available. This is important, since each solar panel can produce different amounts of power due to manufacturing anomalies, intermittent shading, leaves, dirt, passing clouds, and/or other factors. While a string inverter’s MPPT works fairly well, especially in sunny areas with no obstructions, having all solar modules tied in a series circuit can still be a disadvantage for several reasons: 1)   MPPT technology is essentially drawing the average amount of power available, rather than the full amount available from each module. As a result, the entire solar array can lose 15% to 30% or more of its full potential output because one or more panels in the string are temporarily shaded or have debris. 2)   If you have limited roof space and need two arrays with different sun orientations, each array will need its own string inverter. 3)   Similarly, since module mismatch can cause efficiency issues, you’ll need to use the same brand and panel voltage within each string. 4)   String inverters don’t easily allow for expanding the system in the future unless you purposely oversize the inverter, wiring, and other BOS parts. 5)   While it’s common to have online monitoring with string inverters, the monitors only measure the performance of the entire array. So, if an array isn’t producing the expected power, installers will need to individually test each panel for malfunctions. 6)   String inverters are typically warrantied for 10 years and have an expected lifetime of 12 to 15 years, while solar panels typically last 25 years or longer. Thus, the string inverter will need to be replaced at least once. Adding DC Power Optimizers to String Inverters Adding DC power optimizers to a string inverter system can solve most of the above string inverter challenges. Power optimizers are relatively new...

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3 Ways Enphase M215 Just Got Better
Jan27

3 Ways Enphase M215 Just Got Better

Enphase Energy just revealed some key improvements to the Enphase M215, 215 Watt microinverter and their system as a whole. Take a look at the new features… 1. Enphase M215 with Integrated Ground Photovoltaic (PV) systems in North America have normally required bonding each microinverter together with continuous copper grounding wire.  The purpose of this standard is to prevent fires, protect workers from shocks, and comply with National Electrical Code (NEC).  Some changes to NEC have allowed Enphase to incorporate integrated (DC isolated) ground technology into their 4th generation line, which now includes the M215. Because the DC circuit is isolated and insulated from the ground, you can now safely install Enphase M215 microinverters without a Grounding Electrode Conductor (GEC) connected to each microinverter. Coming soon… the 4th generation M215. Download the new M215 Microinverter data sheet (PDF). As you can see in the image above, the M215 now has a flat lid with no grounding lug. Yes, this product meets U.S. National Electrical Code (NEC) requirements Ungrounded Photovoltaic (PV) Power Systems and it’s actually a safer product. Integrated Ground(IG) technology simplifies this cumbersome installation process, reducing materials and labor costs.  Installers and D.I.Y. customers already prefer to use Enphase for residential systems because of its straightforward installation.  The new M215 further simplifies the process because there’s no need to run copper wire between each microinverter. Sound familiar?  Last year, Enphase released their fourth generation model, the Enphase M250, which also features this new IG technology.  The Enphase M520, however, is optimized for solar panels all the way up to 300 Watts. The Enphase M215 is compatible with modules up to 270W, a lower wattage range where consumers are finding the best dollar per Watt on solar panels.  So basically, Enphase put all the benefits of the M250 into the M215. Oh yeah, the new Enphase M215 also has a CEC efficiency rating of 96.5% compared with the previous version’s 96%. For more information on the new M215’s integrated grounding feature, please see Enphase’s M215 white paper. 2.  Wi-Fi option for the Envoy Communications Gateway Now Available! The Envoy Communications Gateway is the hub connects your Enphase microinverter system to Enlighten, Enphase’s web-based monitoring software for PV systems. Instead of running an Ethernet cable from the Envoy hardware into a broadband router, you can now connect the Envoy Communications Gateway with the new wi-fi option (pictured top right). The new Wi-fi option simplifies connectivity and makes finding a location for the Envoy way easier. Connect up to 600 microinverters to one Envoy.   3. MyEnlighten & Enlighten Manager Software Customers who use the Enphase Envoy to monitor their systems get...

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How to make a light source out of plastic bottles.
Jan08

How to make a light source out of plastic bottles.

Well over a billion people on our planet don’t have access to electricity and this D.I.Y. solar light can brighten homes during the day and replace toxic kerosine lamps. Watch this video: 4 easy steps to light a room with a solar bottle lamp: 1. Add a couple teaspoons of bleach to keep the water clean. 2. Drill a hole in roofing to fit the circumference of the plastic bottle. 3. Push the bottle up through the hole in the roofing. 4.  Seal the the bottle with polyester resin to prevent a leaking roof. [i] It’s a stunningly simple lighting solution: sunlight passes through the water inside the bottle, refracting light, and brightening the room. Even though you might not insert a 2-liter bottle into your roof, this might also come in handy if you’re want to illuminate the inside of a tree-house. Check out the infographic below and “share” this page if you think this is cool!    ...

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Texas $2 per Watt Rebate?
Nov27

Texas $2 per Watt Rebate?

Coserv’s per Watt Rebate If you’re one of the 141,000 member-owners of the  Coserv Electric Cooperative in Texas and you’re thinking about going solar, you’re smart. You might have heard that this co-op utility offers a $2 per DC Watt rebate on solar generation. $2 per Watt? This rebate means homeowners in Texas can get $2 per DC Watt installed.  Many solar rebates are based on the size of the solar system in AC Watts,  which is a measurement of the system after the electricity has been converted from DC to grid-quality AC power.  A $2/ AC Watt rebate would already be a very strong incentive, but this rebate is in DC, which means more money in your pocket. $2/W DC  >  $2/W AC For example:  you’re installing a 2kW (or 2,000W) grid-tied solar system.  That number “2kW” is based on the sum total of watts in your solar system – we’ll call it eight 250W solar panels. In this case, you would qualify for a rebate of $4,000, given that the funds allocated towards this rebate program haven’t yet been exhausted. Depending on the size of your system, this  rebate your 2 kW (or 2000 Watt) solar system will yield a couple hundred dollars more. This utility rebate program caps off at $5,000 for each system, which is equal to a 2.5kW solar system.  Contact us today for solar design help and while you’re at it, fill out the Coserv solar rebate application form.  All 2013 funds were reserved in early 2013.   Check their website at the beginning of 2014 for any changes to this rebate and get on the list so they can reserve funds for your project.   Rebates are paid out after your solar system is installed and inspected by a Coserv Auditor. On top of this rebate from Coserv, you’ll also qualify for the Federal Tax Credit.   After any state/local/utility rebates have been subtracted (including Coserv’s solar rebate), 30% of this net cost is returned to you in the form of a tax credit that directly reduces the dollar amount you pay on your taxes....

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