For Off-grid Renewable Energy Applications

SANTA FE SPRINGS, Calif., Oct. 21, 2013 -- Trojan Battery Co., the world's

leading manufacturer of deep-cycle batteries, has developed an automated
battery sizing calculator to accurately size a battery bank for renewable
energy applications. The battery sizing calculator can be found at
www.batterysizingcalculator.com.

Trojan's battery sizing calculator is designed to simplify the task of
properly sizing a battery bank for off-grid renewable energy systems. A
battery bank is a vital component of a system, so careful attention must be
paid to battery sizing to ensure maximum battery performance and longevity.
Three factors must be considered when sizing battery banks for renewable
energy systems: 1) the electrical power required, or load, of a particular
application, 2) the maximum depth of discharge (DOD) the battery will be
allowed to go down to and 3) the autonomy desired, or the number of days the
battery will be used to power the loads.

"Failing to properly design the system to meet specific load requirements,
leads to improper sizing of the batteries which can reduce the life of the
battery bank. Therefore, it is important to optimize systems to meet the
load requirements of a customer's particular application requirements," said
Kalyan Jana, technical product manager at Trojan Battery. "Not fully
understanding the system's load profile for both the real energy demands and
the duty cycle can have a dramatic impact on system performance. It also
can potentially cause the system to lose power or require a replacement
battery bank sooner than necessary. Trojan developed its battery sizing
calculator to simplify this process and make it more convenient for our
customers to determine their battery needs."

Trojan's battery sizing calculator is an easier way to determine battery
capacity than manually calculating load requirements and then converting
them to battery capacity. Customers simply fill in the appropriate
information on the electronic form such as battery voltage, desired to
depth-of-discharge (DOD), days of autonomy, AC and DC loads, device types
with power ratings, and hours per day or days per week used, and the
application automatically determines the required battery capacity. It then
recommends the Trojan battery models for their particular set up. The
calculator also allows customers to run "what if" scenarios to find specific
battery options to meet their budget or configuration requirements.

"It is important to optimize battery systems to meet the load requirements
of the application," Jana said. "If manufacturer's data is not available
for a particular load, steps should be taken to measure actual power use
before calculating the total energy storage requirement. Equally important
is the need to truly understand the specific nature of the application and
customer expectations."

To learn more and receive a demonstration of the battery sizing calculator
tool, please visit the Trojan Battery booth #4226 at Solar Power
International from Oct. 22 - 24 in Chicago at McCormick Place.

About Trojan Battery Company

Trojan Battery Company is the world's leading manufacturer of deep-cycle
batteries, offering a complete portfolio of technologically-advanced
deep-cycle flooded, AGM and gel batteries that provide maximum long-lasting
performance to meet the requirements of today's advancing renewable energy
systems. Trojan Battery Company, founded in 1925, is ISO 9001:2008 certified
with U.S.-based operations in California and Georgia. For more information,
visit www.trojanbatteryRE.com