Energy calculators

BP Solar Clean Power Estimator
The Clean Power Estimator works out how much pollution you can prevent and how much you can save on your energy bills by installing solar power. This is similar to the tool on the California Energy Commission web site, below.

California Energy Commission Clean Power Estimator
The Clean Power Estimator is an economic evaluation software program the California Energy Commission is licensing for use from Clean Power Research. The program provides California residential and commercial electric customers a personalized estimate of the costs and benefits of investing in a photovoltaic (PV) solar or small wind electric generation system.

A Performance Calculator for Grid-Connected PV Systems
PVWATTS calculates electrical energy produced by a grid-connected photovoltaic (PV) system. Currently, PVWATTS can be used for locations within the United States and its territories. Researchers at the National Renewable Energy Laboratory developed PVWATTS to permit non-experts to quickly obtain performance estimates for grid-connected PV systems.

Summary Solar Radiation and Climate
Data for San Francisco Area (MS Excel)
Collected from the National Renewable Energy Laboratory, this is a 30-Year Average of Monthly Solar Radiation (1961-1990) for San Francisco. This data is the basis for the CCEnergy Energy Estimator spreadsheet tools. Data is available for other cites, as well, from the NREL web site National Solar Radiation Data Base, which supplies hourly solar and meteorological data from 239 locations in the United States and its territories.

Bergey Cash Flow Calculator (MS Excel)
The Bergey Residential Cash Flow and Payback Period spreadsheet lets you calculate the payback period for a specified utility-intertied BWC system. Bergey Windpower Co. (BWC) is a manufacturer of small wind turbines and systems.

Bergey WindCAD Performance Calculator (MS Excel)
Use this spreadsheet to calculate the potential windpower of a Bergey Windpower WindCAD Model turbine based upon input about your installation environment.

CCEnergy Tools

CCEnergy Site Visit Worksheet (pdf)
CCEnergy will perform a site survey of your home or business to determine its suitability for a solar PV or thermal system. This worksheet details exactly what this survey entails so you know what to expect. Basically, you should have your utility bills for the past 12 months, and provide access to your roof or other desired location for your array.

CCEnergy Estimated Energy Output Calculator - Northern Bay Area (MS Excel)
This tool enables you to calculate an appropriately sized PV array if your home or business site is in the San Francisco area and northern California (latitudes 37 degrees to 43 degrees). This spreadsheet template uses Solar Pathfinder data and electricity usage data as input, and is based on Solar Radiation and Climate Data for this area. (Spreadsheet has multiple pages.)

CCEnergy Estimated Energy Output Calculator - Southern Bay Area (MS Excel)
This tool enables you to calculate an appropriately sized PV array if your home or business site is in the South Bay and Peninsula areas of San Francisco (latitudes 31 degrees to 37 degrees). This spreadsheet template uses Solar Pathfinder data and electricity usage data as input, and is based on Solar Radiation and Climate Data for this area. (Spreadsheet has multiple pages.)

CCEnergy Guidelines for making survey sketches (pdf)
CCEnergy will generate a scaled CAD drawing of the proposed array location as a means of determining how many modules or collectors can physically fit in a given space. These guidelines help our field representatives to create better sketches so that our draftsman can work quickly and efficiently.

CCEnergy Solar Electric (PV) System Installation Inspection Checklist (pdf)
When a member installation is complete, the co-op performs an in-depth inspection of the system to make sure that all components have been installed properly and that the system is performing within specifications.