The E-site is an energy saving site solution designed to reduce the energy consumption of telecom BTS sites from 75%-95%.

1. E-site

3. Key advantages with the E-site solution
Complete turn-key solution for off-grid sites
• This fully complete solution includes tower, wind turbine,
solar panels, shelter, batteries, back-up diesel genset, cooling systems,
CW and installation of Diriflex control system.
Power efficient solution
• Extremely power efficient solution specially designed to
generate and use energy in an optimal way.
Low life-cycle cost
• The solution lower the OPEX costs compared to traditional diesel sites.
Intelligent control system
• Diriflex®, the intelligent control- and management system,
allows for optimized use of all energy resources.
One stop shop
• E-site® is provided by one supplier with full responsibility.
JARLSØ .

4. E-site, Site layout. Vara Sweden
Leading technology for Telecom Solutions
TeleE-site Case Study
This E-site case study is based on information from our Renewable Energy site solution in
Africa.
A vast amount of data and performance statistics has been derived from the real-time intelligent
control and management system, Diriflex® which is part of the E-site®. Presented below are the
main conclusions from a six month measuring period on a trial site with an average total power
requirement of 1.4 kW.
95 % Diesel Reduction
As shown below, the diesel generator has run only 250 hours in six months, which is 6 % of the
total operating hours. Assuming that the average wind will remain at the same level for the next
six months, the total diesel consumption will be less than 600 liters per year. Compared to a
diesel driven site consuming 2 liters/hour, this would mean a yearly diesel saving of about 16
700 liters, adding up to at a 95% diesel reduction.

5. E-site, Site layout. Vara Sweden
One yearly visit resulting in substantial Renewablening hours
OPEX reduction
Diriflex® allows for remote site operation, Genset 6%
thus considerably reducing the need for site Renewabl
visits. Together with the limited diesel genset es
run hours, 250 hours during the 4 100 hour
measuring period, this means that the need
for fuelling and maintenance visits to site is
reduced to once annually(!). With off-grid
Renewable
sites, like the one in this case study, being 94%
very difficult and time-consuming to reach,
reducing the number of site visits has reduced
OPEX substantially

6. Dirif
E-site, Site layout. Vara Sweden
One yearly visit resulting in substantial OPEX
reduction. The average wind speed during the whole
period was 5.3 m/s at the wind turbine. This
corresponds to average wind speed of 3.8 m/s at 10
metres. These figures are derived from wind speed
measurements on site with adjustments for the actual
height of the wind turbine, which in this case is 60
metres. Note that the 5,5kW wind turbine is placed on
top of the telecom tower, which is a unique feature of
the E-site® compared to other renewable site
solutions.

7. d E-site, Site layout. Vara Sweden
1200
1000
800
600
Consumed power
400 Wind power
Solar power
200
0

8. t E-site, Site layout. Vara Sweden
The chart above shows that in the first three months wind
conditions were very good with an average wind speed of 7.4
m/s at the wind turbine. This corresponds to 5.3 m/s at 10
metres. During this period wind power catered for 86% of the
total consumption. Solar power complemented with 11 % of
the site’s energy need. An important fact is that the Diriflex®
never started the diesel generator during the first two montIn
the seasonal low wind period, November to January, the
average wind speed at the wind turbine was 3.3 m/s, which
corresponds to 2.3 m/s at 10 metres. Even with this low wind
speed the wind power contributed with 24% of the total power
consumption and solar power complemented with 27%.
hs.

9. E-site, Site layout. Vara Sweden
Conclusions
During the six month measuring period the site has performed with excellent results. The diesel
generator did not start at all in the first two months and compared to a traditional diesel driven
site, diesel consumption has been reduced by staggering 95 %. Based on an integrated renewable
site solution where our technology know-how allows for the wind turbine to be placed at the top
of the tower or mast, the Diriflex control system has demonstrated its efficiency and superiority
in reducing site OPEX. Furthermore, by reducing the maintenance and fuel visits to once per
year, not only OPEX savings from the diesel reduction, but also the savings from avoiding
visiting sites in far away rural areas site will be considerable.

10. E-site, Site layout. Vara Sweden

11. E-site, Diriflex Control
system, web interface
DiriflexPresentation.

12. E-site, Simulations

13. E-site, Site layout. Vara Sweden

14. E-site, Site layout.
Main shelter, Solar
array, and Wind turbine

15. E-site, Site
footprint

16. E-site, Main
shelter

17. E-site, Battery Bank.
20pc 12V VRLA 1150Ah

18. E-site, Cooling
systems

19. E-site, Diriflex Control
system, HW

20. E-site, Electrical
single line diagram

21. E-site, Tower
and lifting
device

22. E-site, Wind
power. 6kW 5,6m

23. E-site, Genset. 5kW
Diesel generator, 48VDC

24. E-site, Solar power.
12 panels, 2400W

25. E-site, Genset shelter

26. E-site, Future.
46m Tower with 2pc
5,6m 6kW
windturbine

27. E-site, Future.
10m 10kW Windturbine
3m 1,55kW Windturbine

28. Contact information:
Lars Strømme
Jarlsø
Rambergv 3
3150 Tønsberg
Tel: +47 93019436
Fax: +47 33373801
E-mail: lars.stromme@jarlso.com
www.jarlso.com

29. E-site, Future.
Genset with Perkins
engine