eHome Solar, Inc.

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Reduce your energy cost and save the environment

To determine the cost effectiveness of your 1 KW system requires an understanding of how your utility company's rate structure works. The rate is usually based on a tier system and the more electricilty you use the higher the cost at the end of the rated month. The upper tiers are significantly more expensive than the bottom usually 4 times higher than the baseline rate. If your higher rate can be reduced by 1 KW that would add up to a large savings. There is a way to calculate your savings using your electric utility bill. Just reduce your kilowatt hours purchased by 150 KW. To forecast the dollar savings multiply your highest tier usage cost by 150 (kWh) and reduce your utility cost by this amount. Depending on your usage make sure you incrementally increase your system size and thus this will incrementally decrease your utility bill.

To calculate the state incentives available to you for installing a system, use the current California Solar Incentive of $1.55 per installed watt.  For a 1 kilowatt system this would be $1,550.00 (1000 watts * $1.55) which is sent to you in the form of a check at the completion of the system installation.  Be aware that this is calculated on the EPPB – Expected Performance-Based Buy-Down – which uses the AC output rating of the system to predict energy production and savings.  The AC rating takes into account the efficiency of the module (PTC rating) and inverter to determine the performance of the system.  For New Solar Homes and Commercial systems there are separate rebate amounts and programs – visit http://www.gosolarcalifornia.org/ for more information.