Solar Inverters – from

COMPETENCY to CREATION

.

Su-Kam Power Systems

Range Sweet Spot

Applications TAM

0 - 250W 5-10W

Rural Home Lighting, Street Lighting, Lanterns, Emergency Lights, Lighting Retrofits etc

20 million+ households, Remote Village Electrification program of MNRE covering about 10,000 villages

India’s Solar Market Classification

250W-5KW (off-grid)

1KW Residential, Small Commercial, SPV Pumps

Entire Power back-up industry market, 4 million inverters per year

5 - 50KW (roof-top, off-grid)

3KW

Big Commercial, Telecom Towers, Rural ATMs, Govt. Buildings

150,000+ rural telecom towers, 50,000+ rural ATMs

3 - 100KW (roof-top, grid connected)

3-25KW Big Commercial, Govt. Buildings

70% of commercial buildings in 2030 are to be built from now to 2030.

>100KW, IPP, Grid-connected

100KW-1MW Independent Power Plants

National Solar Mission – 1000MW by 2013, 20,000MW by 2022

5” Ceiling Retrofits

Quality of charge controllers are mostly not good Mostly non-PWM. No multi-step charging No Temp. compensation of batteries No State of Charge information

Solar Applications – DC / Low Power Apps

Solar

Charger

Controller

Essentially a Cost Vs Performance dilemma!

Energy

Source

PV Array

Loads

AC

Distribution

Panel for

Load

Utilization

Solar PV

Inverter

Battery

Mains

Solar

Charger

Controller

Energy

Conversion

Standalone Solar Power Systems for Households

Electronics Life – 10+ yrs

Efficiency – 96%+

Controlled DoD, Top-up Charging, Equalization

Battery Life –

1200-1500 cycles

@ 60-70% DoD

All of above with wider temperature / moisture /

dust / handling tolerances

High-efficiency charge

controllers

Low-cost MPPT

AMF Panel Solar Charge

Controller

Solar panel

Battery bank

Inverter

SMPS

Change Over switch

ACDB DCDB

DG EB Grid

DC Load AC Load

Controller & GSM/GPRS

Modem

Control & Measurement Bus

Off-grid Solar PV Systems (Telecom, ATM …)

Battery Management &

Control System.

High Efficiency

High Reliability, N+1

Redundancy

Modularity

Remote Monitoring,

NOCC Center

Alerts and Triggers

Roof-top Grid Connected Systems

Islanding – Creating Virtual Grid DG Set compatibility

Grid Stability

Grid Availability Net Metering

Feed-in Tariff

Su-Kam Solar Energy Products

1. Solar Home Lighting System.

2. Stand-alone Solar Power Systems for households.

3. Grid-Connected Solar Power Systems for household and small establishments

4. Solar Powered Street Lighting Systems.

5. Solar Powered Water Heaters for households

6. Solar Powered Tube-wells.

7. Solar Powering and Management Systems for Cellular Mobile Towers.

8. Solar Powering and Management Systems for Rural ATM machines.

Su-Kam’s Completed Project – Rural Solar Home

Lighting Systems

• 1.2 – 3.6W DC Consumption • 100 - 300 Lumens

Su-Kam’s Ongoing Projects – Solar LED Lighting

Solutions

Essential Features :

•More than 3 days of autonomy

•Automatic Dusk to Dawn Controller (DTDC) / Timer

operation

•Highly efficient charge controller

•Temperature compensated set points

•Weather proof luminaries

•All necessary protection

•UV stabilized bowl and canopy

•Anodized aluminum reflectors

• 7.2 – 14.4W DC Consumption

• 600-1200 Lumens

PV Module

SCC

Solar Inverter

LOAD

Battery

LOAD

Mains

Available in 250VA,

400VA, 650VA, 850VA,

1500VA packages!

Su-Kam’s Completed Projects –

Standalone Solar Power Systems for Households

Su-Kam’s Completed Projects –

Standalone Solar Power Systems for Households

Su-Kam’s Ongoing Projects –

MCD Aap Ke Dwaar

Solar powering of 2000 Information Kiosks for

Municipal Corporation of Delhi, New Delhi

Su-Kam Solar PCU Range: 1 to 10 KVA

Power Back-up

for

Telecom

Major Clients:

6 KW Hybrid Solar Powering of

Telecom Site in Uganda

Su-Kam’s Completed Projects ...

Su-Kam’s Ongoing Projects – Solar

Powering of ATM Machines

State Bank of Patiala ATM, Sangrur, Punjab – Turnkey Solution

for Hybrid Solar-Grid powering.

Su-Kam’s Completed Projects ...

40 KW Solar Inverter at Brahma Kumaris Ashram, Manesar

Three Phase Solar Inverter Range with Grid Charging: 10 to 100 KW

Su-Kam’s Ongoing Projects –

Grid-Connected Solar Power Systems for

household and small establishments

Grid-tied Solar Inverter Available from 3

KW – 10 KW

Grid-tied Solar Inverter

Monitoring Software Solar Inverter 1P

(till 10KW)

Solar Inverter 3P

(till 100KW) SMF Battery

(7.2 – 200AH)

Solar Panels Solar HF Inverters Solar Charge

Controllers

Solar Power Conditioning

Units (PCU)

Su-Kam Solar Products

Su-Kam’s Valued Clients

Testing Standards / Accreditation Agencies

IEC 61727

PV Systems - Characteristics of the Utility Interface. <10KW PV systems connected to low voltage grid.

IEC 62109

Safety of Static Inverters. Comparable to UL 1741. Mechanical and Electrical safety aspects

IEC 62116

Testing procedure of Islanding Prevention Methods for Utility-Interactive PV Inverters

IEC 60364

Electrical Installations of Buildings: Requirements for Solar PV power supply systems

G83/1 Engineering Recommendation For Small Scale Embedded Generator

Main focus on

Power Quality Parameters

Voltage & Frequency Range

Flicker, DC injection

Harmonics and PF

Loss of Mains test

Under / Over Voltage: 207V / 264V

Under / Over Frequency: 47Hz /

50.5Hz

IEC PV BoS Standards

NABL, Solar Energy Center,

Fraunhofer Institute, Intertek

Customize the PV Inverter testing standards for India

Testing Accreditation

Focus on new technologies • Multi-string inverters - a single inverter to

convert power input from several module strings, reducing inverter costs for PV systems.

• Maximum Power Point Tracker (MPPT) for each string, ensuring maximum energy yield.

• Modularity and N+1 redundancy

• Improve MTBF to give better reliability

• Improved Higher KVA product range.

• Minor KVA adjustments in the lower end inverters.

• HF Solar Inverters

• Micro inverters for maximizing the efficiency.

• Grid Interactive solar Inverters to be a part of the solar Power generation play – will be the dominant business in the coming years

Solar Inverter – R&D, Future

Needs R&D:

“Center of Excellence in PV” at IIT-Mumbai - Network of CoEs

MNRE’s PV Research Council – Industry Experts, Scientists,

Researchers, Reps …

CIIE at IIM, Ahmadabad

Innumerable Solar start-ups

1st Generation – Early adoption, Technology proofing. 2nd Generation –

Repeatability, Efficiency. 3rd Generation – Scaling-up.

Future Needs:

Need to create critical mass of researchers

Fill the link between lab to plant

Pre-competitive collaborative research thru’ open domain or

consortium model

Cost Effective Power Electronics – MPPTs, Micro Inverters.

Special Focus on Batteries and storage technologies

Innovative solutions – esp. Business models …

Summing Up …

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Thanks