250kW PV System Poultry Shed Solution - Gatton Document Created by Luke M Hardy lmhardy@smartconsult.com.au Smartcom P/L www.smartconsult.com.au 14 June 2013
Key Points for a PV System 250kW System at Gatton, Qld Highlights Control and stability of electricity prices over the next 25 years. Cost of generating power from - 13.55 Cents per kw over 10 years. Reduction in peak demand load from the grid Replacement of up to 40% - 60%of power usage in example shown (typical usage profile) Payback under 4 years Multiple self funding finance options Sustainable future power supply Technologically mature and sustainable green generation method The PV System is expandable for future site growth Assumptions used are very conservative Rapid deployment under 3 months for complete installation (roof array) Annual maintenance and technical support included in the assumptions Figure 1 Brown Section denotes replaced power from solar
Problem Case Study for a System 250KW Qld Poultry Shed Application Gatton, Qld Electricity is a significant component part of input costs of raising chickens in SE Qld. Power is used for lighting, fans for cooling, as well as water pumps. Annual usage for a set of 8 sheds approximately 891,000 kwh per annum costing approximately $204,000 per annum @ 22.91 cents per kwh on tariff 61. The cost of power is expected to rise significantly over the next few years. By installing solar the farmer is able to produce 47% of his own power at an average price of 13.557 cents per kwh amortised over 10 years. The chicken shed roofs are an ideal location to mount solar panels, and do not require a DA from the council. By installing a solar system, it allows the farmer to control his power costs for the next 25 years. Site Analysis The power usage log on a 30 minute basis for a typical year (baseline) was provided to Smartcom for analysis to determine the optimum size of installation for these sheds taking into consideration. A. Winter / summer usage profile B. Time of day usage profile C. Is any power going to be used elsewhere on the property D. Power usage split between, office, manufacturing plant, refrigeration etc. E. Roof area survey F. Roof loading limits etc (This installation is a behind the meter installation, with no feed in tariff or power purchase agreement (PPA) negotiations required or permissions from the electricity company). Solution In this particular instance the optimum size was determined to be 250KW installation providing the following data on the end solution to the farmer. The farmer was able to save 419,020 kwh PA and produce a saving of $108,473 in the first year. The payback is approximately 4 years. 1. Before Install Usage Times kwh per Day kwh per Month kwh per Quarter Explanation Daytime Usage (Estimate) 1,214 36,936 110,807 Mon-Sun 6-7pm Night time Usage (Estimate) 1,214 36,936 110,807 All other times Totals 2,429 73,871 221,614
System Sizing System Sizing Average System Production kwh per Day No of Panels Inverter Type Right Size for your Location 250kW 1148.17 1021 SMA 3 Phase X System Sizing 2. System Cost 250KW System Average System Production kwh per Day No of Panels Est. Price inc Est. Price Ex 250kW 1148.17 1021 $625,000 $568,182 3. Future Cost without offset Financial Est. ongoing Monthly Usage kwh Est. Future Monthly Bill No Est. Rate Cents Per KW inc avg demand charge Inc Current Per Annum Electricity Spend No Est. Projected Increase 2012-13 73871 $17,063 0.2301 $204,757 Today 2013-14 73871 $19,196 0.2588 $230,351 12.5% 2014-15 73871 $21,595 0.2912 $259,145 12.5% 2015-16 73871 $24,295 0.3276 $291,538 12.5% 2016-17 73871 $27,332 0.3685 $327,980 12.5% 4. Future Contribution and Payback of Capital Cost no LGC's* from a 200KW System Financial Annual Power Generated by @ Per kw Rate Annual Future Bill from Grid Ex Cumulative Saving Capital Cost Less Inc 2012-13 $0.00 $204,757 $0 $568,181.82 0 2013-14 $108,472.91 $121,878.16 $108,473 $459,708.91 1 2014-15 $122,032.02 $137,112.93 $230,505 $337,676.89 2 2015-16 $137,286.02 $154,252.05 $367,791 $200,390.87 3 2016-17 $154,446.78 $173,533.56 $522,238 $45,944.09 4 *Large Credits (LGC) paid on per megawatt solar production @.$35.00 ea
5. Future Contribution and Payback of Capital Cost including LGC's Financial Annual Power Generated by @ Per kw Rate LGC* Credits @$35 ea Cumulative Saving Capital Cost Less Inc 2012-13 $0.00 $0 $568,181.82 0 2013-14 $108,472.91 $14,667.81 $123,141 $445,041.10 1 2014-15 $122,032.02 $14,667.81 $259,841 $308,341.26 2 2015-16 $137,286.02 $14,667.81 $411,794 $156,387.42 3 2016-17 $154,446.78 $14,667.81 $580,909 -$12,727.17 4 *Large Credits (LGC) paid on per megawatt solar production @.$35.00 ea 6. Future Contribution and Payback of Capital Cost including LGC's Financial Monthly Quarterly Monthly Electric Bill Quarterly Electric Bill 2012-13 $0.00 $0.00 $17,063.04 $51,189.13 0 2013-14 $9,039.41 $27,118.23 $10,156.51 $30,469.54 1 2014-15 $10,169.34 $30,508.01 $11,426.08 $34,278.23 2 2015-16 $11,440.50 $34,321.51 $12,854.34 $38,563.01 3 2016-17 $12,870.56 $38,611.69 $14,461.13 $43,383.39 4 The real story is that the chicken farmer has pegged the rise in the price of electricity and replaced 47% of his power usage from solar. The solar installation if amortised over 10 years has fixed the electricity cost at 13.557 cents per kwh. After 10 years this portion of the power is produced at no cost save system maintenance. System Sizing Average System Production kwh per Day No of Panels Inverters Power Type Est. % of Bill Covered 250kW 1148 1021 SMA 3 Phase 47% System Depreciation Schedule (Per ATO Statutory rates over 20 s) Capital Cost $568,000 ex ly Depreciation Cumulative Depreciation % Depreciation 1 $56,800.00 $56,800.00 10% 2 $51,120.00 $107,920.00 19% 3 $46,008.00 $153,928.00 27% 4 $41,407.20 $195,335.20 34% 5 $37,266.48 $232,601.68 41% 6 $33,539.83 $266,141.51 47% 7 $30,185.85 $296,327.36 52%
7. Usage and Load Profile before & After installation a. Summer b. Winter