1. 8/28/2009 Harry Indig, PMP Prepared for Nicole and Ret Taylor 156 Northeast 59 th Street Seattle, WA 98105
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3. The customer’s objective is to look into the feasibility and long-term return on investment of a roof-mounted solar photovoltaic array. The owners believe the retail expense of power in the Seattle area is relatively inexpensive. However; both owners believe making decisions for the good of our community for the future, needs to be evaluated. The prospect of current energy prices increasing in the near future is also of concern. And with the incentives being offered by our government on federal and state levels coupled with the incentives being paid by the local power distribution companies for selling electricity to them; generating their own solar power becomes an attractive venture. Over all else, the owners would like to know if they are getting a good return on investment by putting their capital towards solar power versus investing in a security such as a secured bond or growth equity.
4. Is Solar Right for You? Yes, if you... Own the building where you want to install solar; Have a roof in good shape and shade-free; and Are interested in making a long-term investment to protect yourself from rising energy costs and want to reduce your environmental impact.
15. (8) Silicon Energy 185 Watt Modules w/ racking $8,880 (1) Outback SmartRE 2500 Inverter $4,440 2 strings of 4 modules, 121.2 volts, 15.8 amps SmartRE 2500 Battery Enclosure (4) Group 27 106 Ah batteries Balance of System Components $1480 (1) Combiner box (1) Ground Fault Circuit Interruptor (1) 600 Volt DC Fused Disconnect (1) AC Fused Disconnect (1) 240 Volt Production Meter Miscellaneous conduit and fittings Labor $1480 Grand Total $16,280 ($11 / watt installed)
16. Notes: 1) Meter sockets must be located near each other and outside or otherwise consistent with location allowed by Seattle City Light Requirements for Electric Service. 2) Standard utility socket with face cover (no round sockets). Socket wired per sheet 2. 3) When production meter is removed, bottom terminals will be energized and line terminals will be de-energized (opposite of billing meter). 4) Billing meter will run backwards and subtract when energy flows to utility, production meter only runs forward. 5) Delivered energy flows from utility. 6) Received energy flows to utility.
21. We have seen photovoltaic cells and arrays, also known as solar modules, convert sunlight into electrical energy. Now being used in a number of building applications, including shingles and fenestration, photovoltaic's are becoming a common onsite renewable energy source. Whether roof-mounted or built into the design, solar cells are connected in series to achieve proper voltages. The energy produced can either be stored in batteries or tied directly to the municipal grid. In some cases, you may qualify for tax credits or rebates when purchasing and installing photovoltaic modules. You also may be able to sell the extra energy you produce back to your local utility. The owner’s electric power consumption of 4845 kWh per year based on the past 2 years. This is 13.27 kWh/day. Several key parameters have been evaluated at this home site, which has excellent solar access. Based on the shade analysis performed we calculated 96.1 % solar available sunlight. There is 228 square feet on the east roof for solar array layout. Application of Solar Photovoltaic
22. In 1980 the Solar Rating and Certification Corporation (SRCC) was incorporated as a non-profit organization with the primary purpose being the development and implementation of certification programs and national rating standards for solar energy equipment. A simple installation of several PV solar arrays on this project could use the equivalent sun hours per day based on SRCC certification data as table 1 from the Average Daily Total Solar Radiation for City of Seattle with two tilt angles. The infrastructure of the entire system on your roof needs to meet the CAM requirements of the City of Seattle. Table 1 Average Daily Total Solar Radiation for U.S. Cities City MJ/m²·day 23° Tilt MJ/m²·day 45° Tilt Btu/ft²·day 23° Tilt Btu/ft²·day 45° Tilt Seattle 11.65 11.63 1026 1024
31. Use parallel wiring to increase current (power). This diagram shows a simple parallel circuit to increase current or power. Assume that we are using 12 volt batteries. The power of all 3 batteries add to give us the effect of a battery 3 times as powerful but the voltage stays the same at 12 volts. Parallel wiring increases current but the voltage does not change. This is the wiring used when jump starting a car for example. Use series wiring to increase voltage The voltage of all 3 batteries add to give us the effect of a battery 3 times the voltage or in this case a very large 12 volt battery. In this circuit the current is the same as the current in just 1 of the batteries. But since the 4 volt industrial batteries are very large, we have in effect created a huge 12 volt battery.
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Editor's Notes
The customers home at 156 Ne 59 th St in Seattle, WA has been owned by the current owners since 2005. They were fortunate this house has had no additions and minimally invasive remodels since its construction in 1909. Being its century year, the owners have sought to do an extensive remodel by lifting its 990 square feet main floor off its original foundation, raising it by 3 feet, upon setting it back down. This will double it’s conditioned square footage by allowing the current basement to become livable space. Conservation measures such as passive day lighting, increased insulation, improved circulation, the addition of a heating system, and replacement of the existing hot water system, and with the possibility of adding solar electric generation will all be incorporated into the remodel. As a class Project Photovoltaic at Shoreline Community College has agreed to review the analyze of cost, efficiency, feasibility, and return of investment using a roof mounted solar photovoltaic module array.
Objective The customer’s objective is to look into the feasibility and long-term return on investment of a roof-mounted solar photovoltaic array. The owners believe the retail expense of power in the Seattle area is relatively inexpensive. However; both owners believe making decisions for the good of our community for the future, needs to be evaluated. The prospect of current energy prices increasing in the near future is also of concern. And with the incentives being offered by our government on federal and state levels coupled with the incentives being paid by the local power distribution companies for selling electricity to them; generating their own solar power becomes an attractive venture. Over all else, the owners would like to know if they are getting a good return on investment by putting their capital towards solar power versus investing in a security such as a secured bond or growth equity.
Submission of Plans * For new services or for rewire of existing services (including triplexes or larger multi-residential structures), the customer shall submit a plan package for SCL review and comment. The plan package shall contain the following elements: A plan set which includes: 1. A site plan including: — Any building on the property — Street designations and project address per DPD or L&I — Proposed location of service entrance, switchgear, and meter centers — “ North” and directional arrow — Property boundary designations 2. Legal description(s) (as required) 3. Elevation drawings 4. Diagram of floor plans with unit designation 5. A project schedule 6. A load summary and schedule 7. A paving plan, if applicable 8. Billing and owner information 9. Completion of SCL’s Application for Service (See end of this chapter for forms) 10. A riser diagram showing: — The size of the main disconnect or bus — A detailed sketch of the proposed route of service conductors from the service termination point to the main disconnect or bus — The size, type, and number service conductors — Provisions for metering
Much more could be done to improve the over all efficiency of the home, but the upgrades detailed below represent the “low hanging fruit” that will provide the greatest energy savings for their cost.. The home’s small size allows for choices that may not be practical in a larger dwelling (gas exhaust/vent runs are shorter, smaller units feasible, etc). Some efforts made to improve the home’s heat retention will also be under taken.
Increase insulation in attic space The current attic space has only a few inches of batt insulation dating back to the 1950’s. Six (6) inches of “Blow In” cellulose loose insulation (minimum R-3.2 / inch) will be added to the attic space to provide, at least, an additional R-19.2. Cost: $1,200 Incentives: $360 tax credit towards $5,000 2009 – 2010 credit cap. Savings : The additional insulation should result in 2.5 times less heat loss as without the upgrade. During the summer significantly less heat from the attic space will push down into the condition space so less cooling (via electric fans) will be required. Replace electric space heaters The home is currently heated multiple independent electric space heaters. These units will be replaced with a high efficiency natural gas unit. This change will eliminate the electrical load for warming the house and provide a system which can deliver more heat more quickly allowing the standing over night temperature to be lower. Cost: $2,000 Incentives: $600 tax credit towards $5,000 2009 – 2010 credit cap. Savings : Replacing the electric furnace should reduce the electrical consumption by 12%. Replace electric hot water heater with high volume tank less natural gas unit The home’s hot water needs are currently served by a 60 gallon electric hot water heater that is over 15 years old. Cost: $1,500 Incentives: $500 tax credit towards $5,000 2009 – 2010 credit cap. Savings: Replacing the electric heater should reduce electrical consumption by 10%. Switching to a tank less system will reduce the natural gas usage for maintaining water temperature by about 30% over a convention gas water heater. Gas stove replaces electric unit An electric range/oven is used for cooking. Switching to a gas range/oven will eliminate the electrical load for food preparation. Cost : $800 Incentives: $180 tax credit towards $5,000 2009 – 2010 credit cap. Savings: Replacing the electric range/over with a gas appliance should reduce the electrical consumption by 5%. Errata
I strive to obtain the best price and best technical product for our clients. Moreover, this site could be a net producer of electrical power using any of several systems. Every kilowatt-hour produced will earn at least 18 cents. If the solar modules and inverters are manufactured within the state of Washington the incentive raises to 54 cents per kilowatt-hour. Silicon Energy LLC of Arlington produces such modules, and has been self certified by National Laboratory met this requirement.
The new Silicon Energy design array is highly efficient and the solar cells are encapsulated between two tempered glass plates. With 228 square feet of available roof and modules being 16 square feet each, a total of 8 panels could be installed on your roof with an output of 1.48 kW . Panel size: Silicon Energy = 47 inches by 47 inches Power output: Silicon Energy = 0.165 kW per panel
Individual project – During the course each student will select a PV installation of their choice and develop an appropriate system design, this will include a site assessment, shading analysis, load calculations, conservation opportunity assessment hardware selection, wire sizing, wiring diagrams.
This diagram shows a simple parallel circuit to increase current or power. Assume that we are using 12 volt batteries. The power of all 3 batteries add to give us the effect of a battery 3 times as powerful but the voltage stays the same at 12 volts. Parallel wiring increases current but the voltage does not change. This is the wiring used when jump starting a car for example. The voltage of all 3 batteries add to give us the effect of a battery 3 times the voltage or in this case a very large 12 volt battery. In this circuit the current is the same as the current in just 1 of the batteries. But since the 4 volt industrial batteries are very large, we have in effect created a huge 12 volt battery.
This diagram shows a combination series and parallel circuit to increase both the battery current and voltage level at the same time. Assume this time we are using 12 volt batteries
![[object Object],The customers home at 156 Ne 59 th St in Seattle, WA has been owned by the current owners since 2005. They were fortunate this house has had no additions and minimally invasive remodels since its construction in 1909. Being its century year, the owners have sought to do an extensive remodel by lifting its 990 square feet main floor off its original foundation, raising it by 3 feet, upon setting it back down. This will double it’s conditioned square footage by allowing the current basement to become livable space. Conservation measures such as passive day lighting, increased insulation, improved circulation, the addition of a heating system, and replacement of the existing hot water system, and with the possibility of adding solar electric generation will all be incorporated into the remodel.](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)