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EXHIBIT G - INDIAN DIVER COUNTY PHASE 2 ate' TECHNICAL ENERGY AUDIT ltttt ` BY FPL ENERGY SERVICESr INC. NOVEMBER 2009 For this system, 825,000 gallons per year (average of 68,750 gallons per month or 2200 gallons per day) are required during the solar radiation period at a 48 degree delta T (120F-72F). The solar system savings was calculated by applying the average weekday/weekend water/MBTU usage during the solar period (i.e., daylight) from Table 3 and converting to monthly. Then the solar fraction (or percentage generated by the solar system) was determined from running a F-Chart solar analysis for the desired system (refer to Appendix N). The solar fraction was applied to the overall MBTUs during the solar period to determine the amount of MBTUs generated by the solar system. Once known, the auxiliary energy necessary was determined by subtracting the amount generated by the solar system from the amount required during the solar period. Finally, the overall energy required was determined by adding the auxiliary energy to the amount of energy required during the non-solar period (i.e. night). The cost was determined by applying the energy rate ($/therm) to the total energy. Table 5- Solar Energy Use/Cost EnergyDays per Usage Month MBTUs Gals MBTUs Aux per . . Total MonthSolarWeek (During (During • . Month Energy days end Solar Solar Fraction Heating Req'd Req'd per per • Month Month Jan 23 8 70531.9 29270.8 0.372 10888.7 18382.0 57,739 76,121 761 $686 Feb 20 8 63289.4 26265.1 0.394 10348.5 15916.7 52,036 67,952 680 $612 Mar 21 10 69455.1 28823.9 0.462 13316.6 15507.2 57,441 72,948 729 $657 Apr 22 8 68117.8 28268.9 0.500 14134.4 14134.4 55,838 69,972 700 $631 May 22 9 69993.5 29047.3 0.498 14465.6 14581.8 57,590 72,171 1 722 $650 Jun 21 9 67579.4 28045.4 0.471 13209.4 14836.0 55,689 70,525 705 $635 July 23 8 70531.9 29270.8 0.508 14869.5 14401.2 57,739 72,140 721 $650 Aug21 10 69455.1 28823.9 0.491 14152.5 14671.4 57,441 72,112 721 $650 Sep 22 8 68117.8 28268.9 0.472 13342.9 14926.0 55,838 70,764 708 $638 Oct 23 8 70531.9 29270.8 0.450 13171.8 16098.9 57,739 73,838 738 $665 Nov; 20 10 67041.0 27822.0 0.376 10461.1 17360.9 55,540 72,901 729 $657 Dec 23 8 70531.9 29270.8 0.333 9747.2 19523.6 57,739 77,262 773 $696 Total • 1' 825177 342448.41: 190340.2 678,365 868,705 8,687 i i The solar HW savings was calculated by subtracting the solar energy usage/cost from the existing boiler usage/cost. In addition, a risk/safety factor of 85% was applied to account unknown/varying conditions, such as shading, variations in solar radiation, variations in hot water usage. Proprietary&Confidential 6 Modeling FPL..