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INNOVATION BUS
GROUP:INNOTHENTICTECH
PHASE 1
REFURBISHED BUS
THIS PRESENTATION CONCETRATES ON POWER SUPPLY AND LOADS ONLY
POWER SUPPLY
1.PV SYSTEM SIZING
DC to DC
inviters
DC load
example
Solar PV system for bus
Different components that should be selected according to the system type, site location and
applications. The major components for solar PV system are solar

charge controller-regulates the voltage and current coming from the PV panels going to
battery and prevents battery overcharging and prolongs the battery life.

inverter- converts DC output of PV panels

battery bank- stores energy for supplying to electrical appliances.


auxiliary energy sources-is the bus alternator-battery combiner
and loads (appliances).
Power requirement design for PV system

See spreadsheet-for estimate power requirements and further modification
1.
Determine power consumption demands
2.
Size the PV modules(solar panels)
3.
Inverter sizing
4.
Battery sizing
5. Solar charge controller sizing
PV and Wifi receiver layout

In spreadsheet estimate we will need 13 modules(e.g. 1m x 1.7m for 300WH)

min bus area=28.75m^2, therefore 16 panels max needed on the bus. Therefore 13
modules occupy 22.1 m^2 of the bus.
inverter
Invertor Description
Invertor units
installed with a
solar cells in
between. The
distance between
the solar cells and
the invertor is very
less to enhance
efficiency of the
Invertor

By using a DC 12 volt or 24 volt to AC 120 volt power invertor in a touring
bus you can install several different electronics to enhance the touring
experience. You can be setting up television displays and audio speakers.
By using a bank of batteries you can offer power on the go to your clients.
Some bus tours can be full day tours and now by using DC to AC power
invertors AC outlets can be offered as well to charge laptops, camera
batteries and cellphones as well. If you are setting up a 12 volt DC to 120
volt AC power inverter directly to 12 volt battery source of the bus you
should setup the power inverter as close to the battery as possible to
enhance high efficiency and then run extensions throughout the bus. If
you plan on using the dc to ac power invertor for several hours daily you
should add additional battery power. Make sure all additional batteries are
connected in parallel to retain the same voltage for distributing the
workload among inverter modules and lowering the duty cycle by
half. This load sharing technology greatly extends the longevity of the
inverter system
Battery sizing

From estimated calculation the batteries need for our system= 9

However we can add more batteries to this system to increase capacity.

During anatomy days this batteries can be charged by the alternator when the bus is on the
move.

Lithium ion(LiFePO4) batteries.
Alternator system as a solar supplement
(backup generator)

The basic idea behind the use of an engine alternator is to increase the
charge rate of the solar energy to battery bank system.

It can also happen that the alternator system can act as the sole provider of
electrical power to the battery bank in times when the amount of electrical
energy generated by the solar is sufficiently low to keep the batteries
charged for optimum operation of the appliances within the bus.
What is an alternator?

It is an electrical generator which converts the mechanical energy produced
by a combustion engine to electrical energy.
• It acts as the main electrical power provider to
factory installed accessories in a vehicle such as he
and tail lamps, aircon, radio etc.
How can an alternator be useful?

By considering the fact an alternator is one of the major devices in an
engine, coupling a share of its output to the battery bank is feasible.

However actions such as replacing the standard alternator with high
charge alternators can be taken thus increasing the amount of
electrical energy generated which in turn results to enough output
power to be shared amongst the engine, bus accessories and the
charging of the battery bank.
Alternatively, further improvements to the output power delivered can be made by
installing more than one alternator to the engine pulley system.
DC to DC inverters
Minimum Bus area=28.75sqr.m
Solar modulesaligned on top
Advertising
and
presentati
on LED
screen
Battery bank
compartment
Control area-for all
power supply.
• Charge controller
• Inverters
• power analyzer
• Load protection
circuit
• Circuit breakersisolators.
 Ventilation
included
Power control area( RC panel) and battery bank area
Scrolling
display
Advertising
screen
Control area
Battery bank area
Advertising screens(monitors)

Due to the larger width of LED advertising monitors(such as the one close to wernhil and town square),
TV monitors can be used instead. They have much less power consumption= max 180 W

This monitors can be directly connected to a computer just like a projector, thus it is ideal for any public
presentations

They also have flash drive input terminals. Thus any advertisement's can be loaded on a flash drive in
video format.

A 70-75 inch (177.8 cm-190.5cm long) TV monitors are ideal for this application.

Other monitor sizes can be used all over the bus.