Mauna Lani Bay Hotel, Hawaii
Mauna Lani Bay Resort's first 100 kilowatt photovoltaic system (100 kW DC, 75 kW
AC) was installed in May of 1998. The PV cells are mounted on insulating roof
tiles, which reduces heat gain through the roof and reduces the air conditioning
load. (This means that the PV tiles help in two ways: they produce electricity
AND help save electricity!) The project was partially funded by the Utility
Photovoltaic Group. Components are from the PowerGuard system and installed by
PowerLight Corporation. The
system is rated to withstand 140 mile per hour winds. Time from contract to
completion was 5 months; actual construction took 2 weeks and testing took one
week. Expected energy production is 423 kWh per day. Measured roof temperature
reduction was over 60 degrees (from about 160 to about 100 degrees) Farenheit.
A second photovoltaic system (110 kW DC, 83 kW AC) was installed in January of
1999. The PV panels are on the maintenance shed for the golf course, and the
power is used in the maintenance buildings as well as in the clubhouse. Some of
the golf carts have also been outfitted
with PV panels, and allowing them to operate for several rounds in a row without
having to be plugged in! The specially-outfitted golf carts were used by the
likes of Arnold Palmer during the 1999 Senior Skins tournament at the Mauna Lani.
The Mauna Lani is shown
on the energy map, Hawaii island, site number 11.
2001, a 250 kW PowerLight
system at the Mauna Lani Resort (their fourth large PV system) will provide
power for irrigation of the resort's two golf courses. Also, 122 of the Mauna
Lani's golf cars are SunCaddies: they have PV panels on top, to help charge the
batteries for extended play time.
combined total of the four systems is over 500 kW, making Mauna Lani the largest
resort user of photovoltaic electric energy in the world.
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