PV solar Design and Installtion

PV Solar Design amp Installation

Consideration for Net metering fixed PV For low or high voltage grid connected

Prepared by Eli Israeli Green in Grid solar May 2015

1

Net Metering Equivalent to Energy Storing

2

A Basic Threshold

bull Aluminate shadowing on the Panels

bull Sustainable roof structure

bull Active consumption

bull Electricity board and cables infrastructure

bull Registries for IECrsquos available quota

3

Permits

bull IECrsquos Conditional license

(Temporary and more the 50KW systems)

bull Authorities building permit (more the 50KW)

bull Constructor and Electrical Engineer permit

bull Fire fitter requisite and permit

bull IECrsquos permanent license for production

4

Which parameters effect on the producing

bull Soiling level and hot spot

bull Panel PID phenomenon

bull Panel reflection and degradation

bull Mismatch between the panels

bull Inverter efficiency by load rate

bull Ambient Temperature Air ventilation

bull IEC grid quality such as Cos Ƥ (PF) different phase voltage harmonics spicks and Etc

5

Optional AdditionsUpgrade

bull Main cable diameter depend on the current and distance from the main board

bull Main board in case nan IEC standard bull Lightning rods protection connect to GND bull (In specific areas) bull Top-roof upgrade for Asbestos sealing or any obstacle

effect the PV array bull Roof Construction Strengthening in case of light roof no

compliable for PV panel + constriction weight and wind load (according to the standard)

bull PV plant is not an alternative of Generator In case GR connected PV switch-off automatically

6

Initial Design milestones

bull Technical survey

bull Roofs measurement

bull Pre-design sketches and imagining as option

bull Build an ideal place for Inverters switches DC amp AC boards and switchgear (normally indoor)

bull Poisoning deployment PV layout

bull Simulation analyzing and output power

bull Structure plan for the PV array and the inverters

bull Detail plans DC and AC including SLD

7

PV array deployment

8

Simulation

bull Simulation helps to indicate the system performance and predict the production

bull Simulation shows the analyzing and using base for system optimization

bull PVsyst software in being used by the most of the designers

bull Bankability (confirmed by the bank for credit)

9

System Losses and shadowing

10

Single Line Diagram

11

Generator changeover

Detail design and specifications

bull DC string array topographic

bull Contracture design

bull Panels and inverter manufacture choosing

bull DC amp AC cable infrastructure routing plan

bull DC and AC cable distances and loss

bull Grounding concept and connections

bull Electrical protection calculation and load flow

bull One line diagram module to the main board

12

Protections and Safety

bull PV system is not a source of hazard radiation

bull PV system committed to conform by IEC low and Electrical standard

bull System protection by Switch relays overvoltage and other devices

bull Fire fitter standard

bull Safety element install in the plant area

13

Main Project Milestones

bull First step for project rating bull Map the final PV affective area bull Opening request in IEC (deposit payment) bull Conditional permit receiving (Above than 50KW) bull Foundation and infrastructure preparation (Construction

installation and cable channels) bull Receiving the equipment and panels installation bull Electrical concretions Inverters installation and setup bull IEC inspection and reject action bull Fine tuning configuration production metering

installation bull Electrification for the IEC grid

14

Monitoring bull How to know how your system is good or bad

bull Monitoring system present the producing data

bull The precise indication for the system testing call PR the performance ratio Normally a good PR is above 78

bull PR = Energy out (actual) Energy in (reference)

bull Energy in = measure by the Metrologic sensors

bull Energy out = measure by the electricity output

bull Receiving a management reports

bull Receiving alerts (Inverter fail difference)

15

Preparing for installation

bull Check list

bull Visual inspection

bull Measuring and mapping

bull Preparing non penetration foundation base for the construction

bull Prepare functional and safe place for the solar equipment (Panels inverters and boards)

bull Water filter infrastruction on the roof for panel washing as possible

16

Installation process

bull Construction

Construction is preliminary step

Construction anchoring and foundation

Building the internal stand

The classic construction made from Aluminum

17

Installation non conventional construction and frameless made by SolaticsTM

Lightweight

ndash In some configurations as low as 25kgm2

Durable design and manufacturing

ndash Providing industry leading long-term reliability

Novel attachment system

ndash No need for racking amp brackets

ndash Lower BOS cost (balance of system)

ndash Low installation costs - Faster and easier installation

PID

ndash PID free design

ndash Bettercheaper invertors possible

Highly versatile beautiful design

ndash Ultra thin ndash from 4mm

ndash Easy integration into structures

18

Installation process (Continue)

bull Panels classification and installation

bull Cable DC and AC tunnels and wiring

bull DC and AC protection devices

bull Inverter connection

bull Signage and labeling for item identification

An example below

19

IEC test Metering and grid connection

bull IEC final inspection for the PV plant

bull Producing metering monitor by IEC and use for the annual credit offsetting

bull PUA operation permit

bull Electrification and power producing

bull OampM for the next 25 years

20

Actual Improvements in PV

bull More PV panels but lower panel tilt

bull Panels efficiency incising

bull Better system optimization

bull Movement toward increased DC voltage

bull Micro-inverters and Power sharing

bull Panel and strings losses improvement

bull Energy Storing

21

100KW Project Time table

22

Thank you

23

Link to Green In Grid Website