Grid-tied, on-grid, utility-interactive, grid intertie and grid backfeeding are all terms used to describe the same concept – a solar system that is connected to the utility power grid.

Advantages of Grid-Tied Systems
1. Save more money with net metering
A grid-connection will allow you to save more money with solar panels through better efficiency rates, net metering, plus lower equipment and installation costs:
Batteries, and other stand-alone equipment, are required for a fully functional off-grid solar system and add to costs as well as maintenance. Grid-tied solar systems are therefore generally cheaper and simpler to install.

The electric power grid is in many ways also a battery, without the need for maintenance or replacements, and with much better efficiency rates. In other words, more electricity (and more money) goes to waste with conventional battery systems.Additional perks of being grid-tied include access to backup power from the utility grid (in case your solar system stop generating electricity for one reason or another). At the same time you help to mitigate the utility company`s peak load. As a result, the efficiency of our electrical system as a whole goes up.

Equipment for Grid-Tied Solar Systems
There are a few key differences between the equipment needed for grid-tied, off-grid and hybrid solar systems. Standard grid-tied solar systems rely on the following components:
• On-Grid Inverter (Grid-Tie Inverter)  or Micro-Inverters
• Power Meter

On-Grid Inverter 
What is the job of a solar inverter? They regulate the voltage and current received from your solar panels. Direct current (DC) from your solar panels is converted into alternating current (AC), which is the type of current that is utilized by the majority of electrical appliances.
Power Meter
Most homeowners will need to replace their current power meter with one that is compatible with net metering. This device, often called a net meter or a two-way meter, is capable of measuring power going in both directions, from the grid to your house and vice versa.

List of 3kw-5kw On-Grid Solar System,others can be offer as your request

1	On-Grid Solar Power System Model	ON-3KW	ON-4KW	ON-5KW
2	Power	3240 Wp	4320 Wp	5400 Wp
Item	Description	Quantity
Solar Panel	CUPV-270P60,270w poly solar panel	12	16	20
Inverter	MPPT,pure sine wave	1
Solar panel bracket	Aluminum alloy,Flat and Slope Roof installation	1
Cables and accessoires	4.0sqm PV cable ,6.0sqm cable,including all spare parts	1

Solar Panel Specifications
				Futures
				Model:CUPV-270P60
				Type:Poly
				Power:270W per piece
				Vmp:27.9V
				Size:992 x 1640 x 45 mm
				Weight:18.8kg/pc
				Excellent module efficiency of up to:16.8%
				High PTC rating of up to 91.89%
				Outstanding low irradiance performance of up to 96.5%
				IP67 junction box for long-term weather endurance
				Heavy snow load up to 6000 Pa,wind load up to 4000 Pa
				5 years of liner power output warranty
				10 years of product on material and workmanshop warranty
				Mechanical Data
				Cell Type:Poly crystalline,6 inch
				Cell Arrangement:60(6x10)
				Front Cover:3.2mm tempered glass
				Frame material:Anodized aluminum alloy
				Connector:MC KST4/X and KBT4/X
				Per Pallet:26 pieces,520kg
				Max. System Voltage:1000V(IEC) or 1000V(UL)
				Max.Series Fuse Rating:15A
				Application Classfication:Class A
				Power Tolerance:0~+5V
Solar Inverter specifications
				4 inch LCD display
				MPPT controller
				Pure sine wave inverter
				ow frequency single phase
				Generator/Grid Hybrid system
				Remote monitoring(RS485)
				Remote monitoring GPRS/GSM
				Optioanl:7 inch touch screen
				Optional:output 3P4W three phases
PV Combiner Box Specifications
				Lightning protection
				Reverse protection
				Waterproof protection IP65
				Over current protection
				Over voltage protection
PV Mounting Bracket Specifications
				Aluminum alloy
				Wind resistance 24.5m/s-28.4m/s
				Optional:Pot Galvanized Steel
				Roof installation(tin/tile/cement)
				Optional: Ground installation
Cables Screws and Connectors
				4.0sqm. PV cable,6.0sqm. PV Cable
				MC-4 connextors IP65