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Calculators, Apps& Measuring Tools -Basic System Size-Up and CostUsing the new Beta version of this app is sel-explanatory. Click the arrow on the right side of pages to progress through the steps. When plotting four points on the roof for your array, be sure to click each one in clockwise order.Enter your zipcode, then you'll be asked to select your utility company from a list and input your average monthly electricity bill in dollars. (To get this amount, add the total you paid for electricity (not gas) on your last 12 utility bills, then divide by 12.) The calculator generates a report that includes average radiation for your city (e.g. 5.55 5.55 kWh/m^2 per day), and more importantly, the proposed size of a solar array (e.g. Scroll down the page to fin info regarding the required roof area needed to install this array (e.g. 320 sq.ft.), estimated cost of the installation and the reimbursement you can expect from tax credits and rebates.NOTE: IMBY will be discontinued sometime in 2014.First click on 'Go'.
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On the next screen, enter your address, which produces a Google Earth image of your house. You'll see an info box which explains the next step. Again, select 'Go', then drag an array size icon onto your roof. (For residential solar, it should be the '4kw' icon.) Click on 'Run' to generate a report.California Solar InitiativeClean Power FinanceCSIIf you find all these calculators and reports unhelpful or hard to decipher, consider getting a home solar report from TheSolarPlanner.com.
Click for details.Load Analysis and Sizing of System ComponentsTheSolarPlanner.comWhen you click on it, the spreadsheet may download onto your desktop rather than appear onscreen.You'll find lots of links on this page for different products and manufacturers. Provided by Soligent.SunWizeEnerzyTechBDBatteries.comSolar-Store.comWiringThe is a free mobile app (Android only for now) based on NEC 2008, 2011, and can identify the right utility company jurisdiction using your GPS coordinates. With it, you can calculate:- Wire Size & Ampacity- Grounding Tables- Motor FLC Tables- Voltage Drop- Box Fill- Ohm's/Ohms Law- Conduit FillBarr-Thorp.comElectrician2.comEnergy Development CooperativeCerrowire.comElectrician.comNoOutage.comSolarABCs.orgConstructionMonkey.com(scroll down)Electrician2.comLow-cost mobile software appSouthwire.com-Copyright © 2013-2015 TheSolarPlanner.com. The Unirac toolbelt app allows you to take solar measurements with your mobile phone. It includes a compass, clinometer (to measure slopes), and a theodolite (to measure altitude angles).
Download it for free. Array Placement, Orientation, Peak Sun Hours, Wind Speed & Temperature DataAllows you to find the compass orientation of a rooftop using satellite images. Requires free sign up. At Solmetric.Com.Enter either your zip code or longitude and latitude.
In Step 4, you can select 'Crop azimuth axis to fit plotted data' and in Step 5 'Crop elevation axis to fit plotted data' to make the chart easier to read. All other default settings should be OK.Enter your zip code to compute the correct longitude and latitude for your area, then hit the Calculate button. The value is given in degrees, minutes and seconds (e.g. 12° 4' 10'), and either positive (East) or negative (West). Note: The negative symbol is used for western locations. The sample value shown above is thus a positive / eastern declination.NRELWholesaleSolar.comSolmetric.comSolmetric.comWestern Regional Climate CenterNational Climatic Data CenterSolarABCs.org Shading Analysis- The Solar Pathfinder estimates shade at a given site over the course of a year. It costs about $300, and an additional software program is available for simulation and modeling.- A compact electronic device with a built-in cameral that measures potential shading at a site.
It costs $2,000 and includes simulation and modeling software. See also their free- Android mobile app that calculates solar radiation and shading. Like the devices above, the app takes into account solar angles and geolocation data. Unlike those devices, the app is free.A much cheaper, less high-tech gadget than the two items mentioned above. It costs $25. (Note: For many tax credits and rebates, you may still need to submit a Pathfinder or SunEye report.)Cost Estimator and Solar Contractor's Tools/SoftwareSimulators, modeling and design calculators that you can purchase or download for free.Energy AuditsEnter your zip code, then click the arrow next to Analyze Your Use.Enter your zip code, then click on Go. On the next page, select Detailed Input in the far left column, then Energy audit of actual house under 'Purpose of this Assessment'.
Address info is optional. Then press either Calculate to get a report, or Next to add more details about your home. (This site offers a lot of report options, so you can try different combinations to see what works best.)Appliance, shower (water usage), lighting and other usage tools. From Sacramento Municipal Utility District (SMUD).EnergyEfficiencyExperts.comSpheralSolar.com Incentive CalculatorsInverter SizingOther MeasurementsTemp, weight, length, etc.AskNumbers.comSolmetric.comCalculatorEdge.comCreativeArts.comEnter either a side and an angle, or two sides, or two angles, to find a missing dimension. The tutorial section discusses various roof and shade measurements that use the Pythagorean Theorem.