Grid Tie Systems often prove to be a bit difficult to understand for the people enthusiastic to learn about Solar. We have tried to present it in an easy to understand form with differently colored arrows showing the current flow. For further info mail tu us at info@statconenergiaa.com Or visit us at www.statconenergiaa.com

1. SOLAR GRID-TIE SYSTEM
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2. SOLAR GRID TIE SYSTEM
What is a Grid Tie System?
Grid-tied, on-grid, utility-interactive, grid inter-tie and grid back feeding are
all terms used to describe the same concept – a solar system that is connected
to the utility power grid.
50 KWp Grid Tie Central Inverter 20 KWp Grid Tie Inverter

3. ELECTRICITY PRODUCED <= CONSUMPTION
All Produced electricity is
Consumed on site
AC LOADS
GRID
Net Meter
Distribution Box
SOLAR GRID TIE SYSTEM
CONDITION ONE

4. ELECTRICITY PRODUCED > CONSUMPTION
Export Excess to Grid Through
Bidirectional Meter
AC LOADS
GRID
Net Meter
Distribution Box
SOLAR GRID TIE SYSTEM
CONDITION TWO

5. AC LOADS
GRID
Net Meter
Distribution Box
SOLAR GRID TIE SYSTEM
NO GRID=NO ELECTRICITY!
CONDITION THREE

6. AC LOADS
GRID
Net Meter
Distribution Box
SOLAR GRID TIE SYSTEM
Power supplied through Grid Only when PV is
Down but Grid is available
CONDITION FOUR

7. AC LOADS
GRID
Net Meter
Distribution Box
SOLAR GRID TIE SYSTEM
No Battery Bank= No Power Backup
when Grid is absent
CONDITION FIVE

8. SOLAR GRID TIE SYSTEM
ADVANTAGES
1. Save more money with net metering
• Better efficiency rates
• Lower equipment installation costs
• No investment for purchase and maintenance of costly batteries
• With NET METERING, consumer can put this excess electricity onto the utility grid
instead of storing it in batteries.
2. The utility grid is a virtual battery
The electric power grid is in many ways also a battery, without the need for
maintenance or replacements, and with much better efficiency rates.

9. SOLAR GRID TIE SYSTEM
DISADVANTAGES
1. No Electricity When grid is absent
In a power deficient country like India where the Grid is unreliable and power outages
are frequent, the Pure Grid-Tie Inverter will not work to give electricity even when the
sun is shining.
2. Cannot Guarantee 24x7 Electricity
As there is no storage, the consumer will have to suffer from lack of electricity.
3. Limitations While using with Diesel-Generator
4.Poor DG utilisation
With Solar power being generated, Lesser loading on DG Sets resulting into poor DG
utilisation , thus indicating higher cost per unit through DG.

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