Naps Systems is a solar electricity systems company with over 25 years of experience. They provide complete solar power solutions for telecommunications applications. Their systems are extremely reliable and can operate in all weather conditions with little human intervention. This allows telecommunication lines in remote areas without infrastructure to remain operational. Naps Systems has supplied over 2,600 solar power systems for telecommunications applications in over 120 countries on 4 continents. Their case studies in Lapland, Finland and Mongolia demonstrate how their solar power systems provide reliable, low-cost power for telecom sites while reducing operating and maintenance costs compared to diesel generators.

1. Solar Electricity Systems
Since 1981 Experience and Expertise
Naps Systems Oy / Pakkalankuja 7 / FI-01510 Vantaa / Finland
www.napssystems.com / +358 20 7545 666 / +358 20 7545 660

2. Naps Systems Ltd.
Naps Systems is a solar electricity systems
company
We provide complete solutions
We operate on 4 continents and we have supplied
systems for over 120 countries
We have more than 25 years track record in the
industry

3. Core competences
Expertise in sizing, designing and specifying
systems
Extensive expertise in batteries
Extensive expertise in module production

4. Our telecommunications applications
Extremely reliable
Operate in all weather conditions
Little human intervention as possible
Equipped with an alarm signal and studied in order to
sustain the station’s operation for a period long enough for
maintenance personnel to arrive
Fuel cost and
replenishment visits are
saved annually
“Telecommunication lines often pass through remote, uninhabited
areas where no infrastructure exists”
Naps Arctic GSM/NMT Base Station

5. System management
An intelligent controller increases system life
All of our larger system controllers are:
Individually tailored to specific project requirements
Ideal for places where large power, extensive data logging, and
flexible system control is required
Optimizing the battery life time by controlling its charging and by
preventing excessive discharging
Deciding when the back-up generator (if in the system) needs to
be connected or disconnected
Providing the essential user interface for the system, showing
status of charging / discharging, data display, data logging, alarm
signaling and remote communication

6. Solar electricity vs grid connected
General Differences
Solar electricity
+ mobile system
+ decentralised energy
production
+ no transmission losses
+ low investment costs
+ fast and easy
installation
- limited power supply
- requires special low
voltage devices
Grid connection
+ even power supply
+ matches with sudden
large power demands
-
high initial investment
extensions expensive
transmission losses

7. Solar electricity vs diesel generators
General Differences
Solar electricity
+ Easy installation
+ Almost maintenance free
+ Unattended operation
+ Long life expectancy
+ High reliability
+ No fuel, no emissions
+ No excess heat
+ Low overall lifetime cost
-
High initial costs
Fairly large battery capacity
needed
Diesel
+ Easy installation
+ Low initial costs
+ Can be portable
-
Fuel supplies expensive
High maintenance costs
Typical service interval 250 hrs
(every 10 days)
Frequent site visits
Separate equipment room
Short life expectancy
Low efficiency & reliability
Noise and emissions
Excess heat
High overall lifetime cost

8. Case of study, Lapland - Finland
Telecom Operator TeliaSonera's Mobile Phone Base Station in Sokosti
Solar modules
168 pcs 50Watt
System control
unit, arctic version
of the NSCi
GSM/NMT
station
consumption
800 Watts
Battery
fuse box
Panel
centres
Vented single
cell 3600 Ah
batteries
48-Volt system
Diesels 12,5 kVA each
A good battery keeps operating costs down

9. Case of study, Lapland - Finland
Telecom Operator TeliaSonera's Mobile Phone Base Station in Sokosti
Conclusions:
Reliable thanks to the design trimmed to suit the required load
70% of the time solar electricity runs the station
Compared to the grid connection required less financial
investment (1/40)
Quickly set up (4 weeks), revenues to the operator started
coming in much sooner than with conventionally powered
systems
Obtaining permits from the authorities was easy as the solar
required no power lines or even road into a delicate wilderness
area
Solar modules withstand extreme weather conditions
Authorities are pleased with system that can be removed - at
the end of its life time - leaving no trace to the environment

10. Case of study: Mongolia
Telecom Mongolia's 800-kilometer Telecom Backbone
Capital
Centre province
Repeater station connected to electricity
Repeater station powered with solar electricity

11. Case of study: Mongolia
Telecom Mongolia's 800-kilometer Telecom Backbone
Conclusions:
Significant savings - the client’s operating costs reduced 90%
thanks to:
The status of the repeater stations is monitored remotely - no
need to frequent visits
As diesels are used only for back-up the life of
the equipment has increased and the
consumption of fuel has reduced
“Power supply to these stations was very expensive in terms of maintenance
and refuelling costs, and in-time refuelling was not guaranteed, as Mongolia is
completely dependent on imported oil products. From this reason we chose
solar electricity to provide reliable and economic alternative to power repeater
stations in remote area.”
Dr. Namjil Enebish, Post and Telecommunications Authority, Mongolia

12. Selection of telecom references
Sweden
5 telecom systems
Finland
2 telecom systems
Iraq
12 telecom systems
Mongolia
30 telecom systems
Algeria
20 Telecom systems
China
14 telecom systems
Nepal
27 telecom systems
Morocco
86 telecom systems
Bangladesh
14 telecom systems
Pakistan
13 telecom systems
Mali
36 telecom systems
Greece
114 telecom systems
Cameroon
9 telecom systems
Congo
2 telecom systems
Yemen
307 telecom systems
Sri Lanka
6 telecom systems
Uganda
53 telecom systems
Ethiopia
2.634 telecom systems
Libya
3 Telecom systems
Sudan
19 telecom systems

13. Naps Systems Ltd
Pakkalankuja 7, FI-01510 Vantaa, Finland
group@napssystems.com
Tel. +358 20 7545 666, Fax +358 20 7545 660
www.napssystems.com
Naps UK
Tel. +44 1235 529749, Fax +44 1235 553450
uk@napssystems.com