Solar Hot Water Presented by Utah Solar & Alternative Energy

UNDERSTANDING SOLAR: Current sources of energy

SOLAR WATER HEATING IS AN ESTABLISHED TECHNOLOGY IN EUROPE © GSS

THE US HAS BETTER SOLAR CONDITIONS THAN EUROPE… Not to scale

…BUT NORTH AMERICA TRAILS OTHER COUNTRIES IN THE USE OF SWH M 2 collector space installed/1000 inhabitants 6% 8% 26% 61% 5% 0,5% 26% 61% Share of residential water heating met by installed collectors Source: Sarasin, ESTIF. Note: Collectors used for commercial applications included. Europe 2020 is an industry projection for 2020

Closed loop glycol TYPES OF SOLAR SYSTEMS Thermo-Siphon Drainback Source: Home Power Magazine June/July 2005 Batch Water Heater Open loop direct k system

SOLAR THERMAL COLLECTOR TYPES and APPLICATIONS Aesthetics Flashing system Concealed points of connection. Ideally suited for our environment. © Roof integrated flatplate Non-integrated flatplate Vacuum tube collector Unglazed collector © Aquatherm Industries/ NREL Pix Cheapest Easy to install and transport. Ideally suited for pool heating. Advantages Theoretically the highest performance/Sq. ft. Better performance than flat plate at more northern latitudes. ©

ACTIVE CLOSED LOOP SOLAR WATER HEATING SYSTEMS

PRINCIPLE OF SOLAR THERMAL COLLECTION > 80% Efficient.

SOLAR COLLECTORS WITH VENTING SKYLIGHT

SYSTEM CONTROL System Controller Protects system from overheating Extends heat transfer fluid life Can be used to meter solar energy

SOLAR THERMAL LOOP

EXPANSION TANK OPERATION Out of the box Solar System Filled, with collectors covered Maximum Pressure at highest temperature of heat transfer fluid Heat Transfer Fluid Protects system from pressure buildup Collects heat transfer fluid as it expands

ANTI-SCALD MIXING VALVE Temperature Adjustment Knob Cold Water at street temp apx 50F Solar Heated water up to 180F Tempered Water Set To Code Max 120F

SYSTEM DESIGNS Stand alone tank either gas or electric Stand alone tank either gas or electric Solar preheat for existing gas unit Solar preheat for existing gas unit Solar preheat for existing electric unit Solar preheat for existing electric unit Solar preheat for tank less heater Solar preheat for tank less heater Solar preheat for boiler Solar preheat for boiler Boiler backed with dual heat exchange Boiler backed with dual heat exchange Combination heat for space and domestic Combination heat for space and domestic

SYSTEM INSTALLATION

Typical System Costs Before Tax Credits or Utility Rebate 2 Panel / 80 Gallon Tank 2 Panel / 80 Gallon Tank –$8,200 for new construction –$9,200 for retrofit 3 Panel / 120 Gallon Tank 3 Panel / 120 Gallon Tank –$9,500 for new construction –$10,500 for retrofit

TAX CREDITS & REBATES Federal Tax Credit: 30% of installed cost. Refundable Federal Tax Credit: 30% of installed cost. Refundable State Tax Credit through DNR 25% up to $2,000 NONREFUNDABLE. State Tax Credit through DNR 25% up to $2,000 NONREFUNDABLE. Questar Rebate of $750 when backing up gas hot water heater or boiler. Retrofit only. Questar Rebate of $750 when backing up gas hot water heater or boiler. Retrofit only.

SOLAR HOT WATER SYSTEMS YIELD FAST RETURNS Source: Findsolar.com and SEIA Assuming switch from electric water heater. Utility subsidies may be higher in some instances. Sales tax exemptions not considered Atlanta, GA Charlotte, NC St. Paul, MN St. Louis, MO Jersey City, NJ Jacksonville, FL Denver, CO Portland, OR Phoenix, AZ Salt Lake City, Ut Boston, MA E. St Louis, IL Los Angeles, CA San Jose, CA Honolulu, HI Years Payback for 3-4 people family house w/80 gallon tank Payback for 3-4 people family house w/80 gallon tank Faster payback in new build or when replacing water heater Faster payback in new build or when replacing water heater Slower payback switching from natural gas in most areas Slower payback switching from natural gas in most areas

WARRANTY Product warranty: Product warranty: 10 years on collectors and flashing system 10 years on collectors and flashing system 5 years on tank and all other components 5 years on tank and all other components Warranty on labor: Warranty on labor: Installers to give 5 years labor warranty Installers to give 5 years labor warranty

KEY MESSAGES – WHY SOLAR HOT WATER?

SOLAR WATER HEATING IS… … often the most cost effective way to go “green” for the average homeowner …supported by the Federal Government and several states with substantial tax credits …a complete system proven for years in Europe … installed by qualified and competent professionals – …safe, low maintenance, and great looking

QUESTIONS ?