Hawaiian Golf Course Completes Independent Field Test on the Earth Care Solar Charging System

Hawaii Prince Golf Course

Solar Golf Cart Top Pay Back Analysis

Report Furnished by Distributor # 09-07099

 

• Charging Costs when using Wall Charger

• Golf Cart Use

• Energy Consumption $$

• Test Results

• Yearly Savings Sheet

• Prolong Battery Life

• Pay Back Analysis

• Earth Care Solar- Peel and Stick Solar Charging System

 This cost analysis was prepared using data collected during the two-week trial test at Hawaii Prince Golf Course. This pay back analysis is an estimate based on environmental conditions, use of golf cart, and current utility costs. Actual savings and pay back time may be different from estimates.

Charging Costs when using Wall Charger

 A 120-volt battery charger is rated to draw 10 amps of power. The power you use in charging the batteries is measured in

kilowatt-hours. The formula is volts times amps equal watts:

   

	Energy rating	Multiplying Factor	Rates
Charger	120 volts X	10 amps =	1.2 Kilowatts (1200 Watts)
Hourly Energy Consumption (KWH)	1.2 Kilowatts X	1 hour =	1.2 Kilo-watt Hour
HI Utility Rate ($0.20)	1.2 Kilowatts X	$0.20 =	$0.24 per hour of Charging

 ***It costs $0.24 per hour to charge the cart

 

 

 

 Test Test Results

1. Conventional golf cart – No solar roof: 54 holes

2. Peel and Stick Solar System: 72 holes

 

Test Trial at Hawaii Prince Golf Course

 The trial test was conducted under Hawaii Prince Golf Course’s normal business operations, using golf course’s cart, employees, and guests. The test was not modified to produce favorable results.

 

Golf Cart Use

 

At the Hawaii Prince Golf Course, Golf Carts are used for one round, 18 holes of golf; then plugged in to charge. Golf Carts may be used again if needed for play.

 

# of Hours to Recharge Batteries

 

The golf carts’ battery is depleted approximately 30% after 18 holes of golf.

Golf cart battery takes approximately 5 hours to fully charge a completely depleted battery. Based on cart use, Hawaii Prince Golf Course charges the golf carts for 2 hours to charge a battery that is depleted by 30%:

 5 hour-full charge x 33% = 1.65 or approximately 2 hours

 

Energy Consumption $$

Using the equation and information provided above, Hawaii Prince Golf Course spends approximately $24,192 a year to charge 140 golf carts for two hours every day:

 

 

Energy Utility Rate # of Hours # of Golf Days / Total

Consumption Recharging Carts Year Recharging Costs / Year

 

1.2 KW $0.20/KWH 2 140 360 $24,192

 

 

1.2 KW x $0.20 x 2 hours of charging x 140 carts x 360 days in a year = $24,192

 Prolong Battery Life

Sulfation is the primary reason that batteries need to be replaced. Solar panels provide a constant charge to the battery bank preventing the crystallization of lead sulfate and can double battery life.

 

Batteries cost $600 per golf cart.

$600 x 140 golf carts= $84,000

Batteries at the Hawaii Prince Golf Course are regularly replaced every three years. 

 Over a period of three years, the golf course spends $28,000 a year:

 $84,000 ÷ 3 years = $28,000

A solar golf cart roof will extend the battery life by two years.

• By installing a solar top, battery life is extended to five years.

• Over a period of five years, the golf course spends $16,800 a year:

 $84,000 ÷ 5 years = $16,800

Hawaii Prince Golf Course will save $11,200 a year on battery costs.

 $28,000 – $16,800 = $11,200 yearly savings

 

If the batteries are purchased with the solar panels they also qualify for a

30% Federal Tax Credit. This also significantly reduces battery costs.

 $84,000 x 30%

Federal Tax Credit= $25,200

 

  Hawaii Prince Golf Course: Peel N Stick Solar Roof Kit Payback Analysis

 This payback analysis shows the total cost of 140 solar tops.

The tops are priced at $1,600

 

 Pay Back Analysis

  

Total Cost of Solar Tops	(1,600 X 140) = $224,000
	$224,000 X 30% =
30% Federal Tax Credit	$67,200
Cost after Tax Credit	$156,800
Yearly Energy and Battery Savings	$10,887 + $11,200 = $22,087
Cost ÷ Yearly Savings	$156,800 ÷ $22,087 = 7 Years

 After the seventh year, the system has paid itself off!

Hawaii Prince Golf Course will continue ton Save a total of $22,087 every year!

Payback without Tax Credit

$1,600 x 140= $224,000

$224,000 ÷ $22,087 = 10 years

 

Yearly Savings Sheet

 

 

Battery Depletion / Hours to Recharge
# of Holes Golf Cart Can Travel	Day 1	# of Holes Remaining		Cost per Recharge	Cost	Yearly Cost	Yearly Savings
	# of Holes traveled		(1% are based on 5 hours to reach full charge)	(one Cart)	(140 Carts)	(360 Days)
Battery					$67.20/	$24,192/
					Days to charge 140 carts for 2 hrs	Year to charge 140 carts for 2 hrs
54 Holes	18	36	33% depleted	$0.24/hr X 2 hours			N/A
	18 holes used54 holes total= .33  33% Battery Depletion		2 Hours to recharge	$0.48/day to recharge one cart
Batery + Peel n Stick					$36.96/	$13,305/
	18				Days to charge 140 carts for 1.0 hrs	Year to charge 140 carts for 2 hrs
		54	22% depleted	$0.24/hrX1.1 hr=			$24,192-
72 Holes							$13,305=
	12 holes used  54 holes total =. 22   22% Battery Depletion			1.1 hours to Recharge	$0.26/day to recharge one cart		$10,887
Solar panel puts back 6 holes per round

 

 

Yearly Savings of $10,887 with Peel N Stick Solar Roof Kit

 

 

 

 

Since this report done in 2009, more recent field evaluations with our improved technology shows greater efficiency giving more distance in some areas of the world, depending on temperature. Due to volume sales, Earth Care Products, Inc. has been able to reduce the price of the increased efficiency panels and the US Government offering a yearly tax credit for battery maintenance; allowing the Solar Charging Systems to be more profitable to the owner than previously shown in this report.