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Solar Grid Tie Inverters

Like all inverters, a grid-tie or grid-interactive inverter converts the direct current (DC) power from your renewable energy source into the alternating current (AC) used in homes and businesses. These inverters are intended specifically for grid-tied applications where they will be tied into the utility grid.

While it is possible to completely eliminate your utility bill with a grid-tie system, many homeowners use grid-tie systems to supplement their usage by using a combination of both their utility grid and their solar array (ie. 70% solar, 30% utility grid). A grid-tie system can also offset 100% of your energy needs.

One of the major benefits of a grid-tie system is net metering, where unused energy is fed back into the utility grid. When no power is being generated by the renewable energy system, the home's power is drawn from the utility grid. The energy the homeowner pays for is the difference between the power drawn from the grid and the power fed into the grid. Most grid-tie inverters cannot be used independently of the utility grid.

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Fronius Symo 10.0-3 208/240 > 10000 VA Grid-Tie Inverter Fronius Primo 5.0-1 > 5000 W Single Phase Grid-Tie Inverter SMA Sunny Connection Unit 1000-US > SMA Tripower DC Connecton Unit
Our Price: $3,190.00
Our Price: $1,895.78
Our Price: $474.00
Fronius Symo 10.0-3 208/240 - 10000 VA Grid-Tie Inverter Fronius Primo 5.0-1 - 5000 W Single Phase Grid-Tie Inverter SMA Sunny Tripower DC Connecton Unit - SMA 1000-US
Fronius
10000 VA
Grid-Tie Inverter
Fronius
5000 W
Grid-Tie Inverter
SMA Sunny Tripower DC Connecton Unit
SMA 1000-US
SMA Sunny TriPower 12000TL-US > 12250 Watt Grid Tie Inverter with installed SWDM-US-10 SMA Sunny TriPower 15000TL-US > 15300 Watt Grid Tie Inverter with installed SWDM-US-10 SMA Sunny TriPower 20000TL-US > 20400 Watt Grid Tie Inverter with installed SWDM-US-10
Our Price: $4,030.18
Our Price: $4,318.25
Our Price: $4,441.00
SMA Sunny TriPower 12250 Watt Grid Tie Inverter - SMA Sunny TriPower 12000TL-US SMA Sunny TriPower 15300 Watt Grid Tie Inverter - SMA Sunny TriPower 15000TL-US SMA Sunny TriPower 20400 Watt Grid Tie Inverter - SMA Sunny TriPower 20000-US
SMA
Sunny TriPower
12250 Watt Grid Tie Inverter
SMA
Sunny TriPower
15300 Watt Grid Tie Inverter
SMA
Sunny TriPower
20400 Watt Grid Tie Inverter
SMA Sunny TriPower 24000TL-US > 24500 Watt Grid Tie Inverter with installed SWDM-US-10 ABB PVI-3.6-OUTD-S-US-A > 3.6 kW Single Phase Grid-Tie String Inverter ABB PVI-3.0-OUTD-S-US-A > 3.0 kW Single Phase Grid-Tie String Inverter
Our Price: $5,032.00
Our Price: $1,770.00
Our Price: $1,610.00
SMA Sunny 24500 Watt Grid Tie Inverter - SMA Sunny TriPower 24000TL-US ABB - 3.6 kW Single Phase Grid-Tie String Inverter - ABB PVI-3.6-OUTD-S-US-A ABB - 3.0 kW Single Phase Grid-Tie String Inverter - ABB PVI-3.0-OUTD-S-US-A
SMA
Sunny TriPower
24500 Watt Grid Tie Inverter
ABB PVI
3600 Watt
Single Phase Grid-Tie String Inverter
ABB PVI
3000 Watt
Single Phase Grid-Tie String Inverter
ABB PVI-3.8-OUTD-S-US-A > 3.8 kW Single Phase Grid-Tie String Inverter ABB PVI-4.2-OUTD-S-US-A > 4.2 kW Single Phase Grid-Tie String Inverter Chint CPS SCE4KTL-O/US > 4000 Watt 208 / 240 / 277 Volt Inverter
Our Price: $1,820.00
Our Price: $1,980.00
Our Price: $2,092.09
ABB - 3.8 kW Single Phase Grid-Tie String Inverter - ABB PVI-3.8-OUTD-S-US-A ABB - 4.2 kW Single Phase Grid-Tie String Inverter - ABB PVI-4.2-OUTD-S-US-A Chint CPS SCE4KTL-O/US - 4000 Watt 208 / 240 / 277 Volt Inverter
ABB PVI
3800 Watt
Single Phase Grid-Tie String Inverter
ABB PVI
4200 Watt
Single Phase Grid-Tie String Inverter
Chint
4000 Watt
Power Inverter
Chint CPS SCE5KTL-O/US > 5000 Watt 208 / 240 / 277 Volt Inverter Chint CPS SCE6KTL-O/US > 6000 Watt 208 / 240 / 277 Volt Inverter Chint CPS SCE7KTL-O/US > 7000 Watt 208 / 240 / 277 Volt Inverter
Our Price: $2,238.10
Our Price: $2,483.19
Our Price: $2,591.05
Chint CPS SCE5KTL-O/US - 5000 Watt 208 / 240 / 277 Volt Inverter Chint CPS SCE6KTL-O/US - 6000 Watt 208 / 240 / 277 Volt Inverter Chint CPS SCE7KTL-O/US - 7000 Watt 208 / 240 / 277 Volt Inverter
Chint
5000 Watt
Power Inverter
Chint
6000 Watt
Power Inverter
Chint
7000 Watt
Power Inverter
Chint SC20KTL-O/US-480 > 20000 Watt 480 Volt Inverter Enphase M215-60-2LL-S22 Micro Inverter > 215 Watt MC4 4MM > ARRA Enphase M215-60-2LL-S23 Micro Inverter > 215 Watt TYCO 4MM > ARRA
Our Price: $5,810.30
Our Price: $135.00
Our Price: $137.50
Chint SC20KTL-O/US-480 - 20000 Watt 480 Volt Inverter Enphase M215-60-2LL-S22 - 215 Watt 208 / 240 VAC Micro Inverter - MC4 Connectors Enphase M215-60-2LL-S23 - 215 Watt 208 / 240 VAC Micro Inverter - Tyco Connectors
Chint
20,000 Watt
Power Inverter
Enphase
215 Watt
Micro Inverter
Enphase
215 Watt
Micro Inverter
Enphase M215-60-2LL-S22-NA Micro Inverter > 215 Watt MC4 4MM > ONTARIO FIT Enphase M215-60-2LL-S24 Micro Inverter > 215 Watt SMK 4MM / ARRA Enphase M215-60-2LL-S22 Micro Inverter / 215 Watt MC4 4MM / ARRA / Zep Compatible
Our Price: $177.21
Our Price: $142.00
Our Price: $171.95
Enphase M215-60-2LL-S22-NA - 215 Watt 208 / 240 VAC Micro Inverter - MC4 Connectors, Ontario FIT Enphase M215-60-2LL-S24 Micro Inverter - 215 Watt SMK 4MM - ARRA Enphase M215-60-2LL-S22 - 215 Watt 208 / 240 VAC Micro Inverter - MC4 Connectors
Enphase
215 Watt
Micro Inverter
Enphase
215 Watt
Micro Inverter
Enphase
215 Watt
Micro Inverter
Enphase M250-60-2LL-S22 Micro Inverter > 250 Watt MC4 4MM > ARRA Enphase M215-60-2LL-S22-IG Micro Inverter > 215 Watt MC4 4MM > ARRA Fronius IG Plus V 3.0-1 UNI > 3 kW 208/240/277 Volt Inverter
Our Price: $157.00
Our Price: $138.00
Our Price: $1,272.90
Enphase M250-60-2LL-S22 - 250 Watt 208 / 240 VAC Micro Inverter - MC4 Connectors Enphase M215-60-2LL-S22 - 215 Watt 208 / 240 VAC Micro Inverter - MC4 Connectors-IG Fronius IG Plus V 3.0-1 UNI - 3 kW 208/240/277 Volt Inverter
Enphase
250 Watt
Micro Inverter
Enphase
215 Watt Integrated Ground
Micro Inverter
Fronius
3000 Watt
Power Inverter
Fronius IG Plus V 3.8-1 UNI > 3800 Watt 208/240/277 Volt Inverter Fronius IG Plus V 7.5-1 UNI > 7500 Watt 208/240/277 Volt Inverter Fronius IG Plus V 12.0-3 WYE277 > 12000 Watt 277 Volt Inverter
Our Price: $1,594.41
Our Price: $2,502.41
Our Price: $3,942.69
Fronius IG Plus V 3.8-1 UNI - 3800 W 208/240/277 Volt Inverter - Fronius 4,210,111,800 Fronius IG Plus V 7.5-1 UNI - 7500 W 208/240/277 Volt Inverter - Fronius 4,210,115,800 Fronius IG Plus V 12.0-3 WYE277 - 12000 Watt 277 Volt Inverter - Fronius 4,210,116,800
Fronius
3800 Watt
Power Inverter
Fronius
7500 Watt
Power Inverter
Fronius
12000 Watt
Power Inverter
Fronius IG Plus V 5.0-1 UNI > 5000 Watt 208/240/277 Volt Inverter Fronius IG Plus V 6.0-1 UNI > 6000 Watt 208/240/277 Volt Inverter Fronius IG Plus V 10.0-3 Delta > 10000 Watt 208 / 240 Volt Inverter
Our Price: $1,970.46
 
Our Price: $2,091.78
Our Price: $3,574.16
Fronius IG Plus V 5.0-1 UNI - 5000 Watt 208/240/277 Volt Inverter Fronius IG Plus V 6.0-1 UNI - 6000 Watt 208/240/277 Volt Inverter Fronius IG Plus V 10.0-3 Delta - 10000 Watt 208 / 240 Volt Inverter
Fronius
5000 Watt
Power Inverter
Fronius
6000 Watt
Power Inverter
Fronius
10000 Watt
Power Inverter
   
 
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What is a power inverter?

The basic function of a solar powered inverter is to convert the direct current to alternating current. Solar panels, and in fact almost all eco-friendly power sources such a wind turbines, generate “direct current”. But almost everything that makes up the fabric of civilization runs on alternating current. Current flows from a battery or solar cell in one direction, but an alternating current stream reverses direction 60 times each second. While this may seem wasteful, the detailed physics of the situation mean the alternating current can be sent over longer distances more efficiently that direct current. Don’t worry if the advantages of AC current do not seem obvious - even Thomas Edison was uncomfortable with alternating current! Suffice it to say that almost all the devices in your home; motors, appliances, televisions, use alternating current.

What is a grid tie power inverter?

Grid Tie Inverter

The main difference between a standard power inverter and a grid tie power inverter is that the latter also ensures that the power supplied will be in phase with grid power. This allows individuals with surplus power (wind, solar, etc) to sell the power back to the utility in the form of net metering or the arrangement your local utility offers.

On the AC side a grid tie inverter must supply electricity in sinusoidal form, synchronized to the frequency of the grid and limit the feed in voltage to no higher than the grid voltage. A grid tie inverter also must disconnect from the grid if the utility grid goes down (blackout). In the event of a blackout, the grid tie inverter will shut down to prevent potentially harming the line workers who are sent to fix the power grid. See wikipedia article on grid tie inverters.

On the DC side, the power output of a module varies as a function of the voltage in a way that power generation can be optimized by varying the system voltage to find the 'maximum power point'. Most inverters therefore incorporate 'maximum power point tracking' (MPPT).

How Solar Powered Inverters and Alternating Current work

The alternating current we usually need to get from our solar powered inverter needs to match the alternating current from our electrical utility. This current alternates because it is produced by rotating electrical generators. Current flows when a coil of wire passes thru a magnetic field. Generators are designed to pass coils of wire thru a magnetic field as they spin, so the current actually leaves, and then returns, to the power plant. As it happens, by using alternating current, the system can be designed for higher voltage and lower current, allowing more power to move thru the grid with less loss to heat.

Current is what causes energy to be wasted in power transmission thru wire. To reduce this ‘line drop’ loss, the voltage applied at the power plant which drives this current can be rather high. Along the way to your house, the voltage is ‘dropped’ in a series of transformers which can be thought of as big coils of wire, almost as a generator with no moving parts.

A solar powered inverter, like any inverter, converts steady direct current from a solar cell or battery to a smooth oscillating sine wave by switching the DC power on and off, very quickly. As a rough cut, switching the DC power 60 times a second creates what is called a ‘square’ wave. But if we subtract out power switched 180 times a second we can ‘round the corners’ of the square’ a bit. And by further switching in power at 300 and out at 420 times a second an inverter can approach a smooth AC wave quite closely. Some electrical components (capacitors and inductors) used on the AC Side of the inverter can store and discharge a bit of power as the many square waves pass, further smoothing out the stack of square waves and approximate regular AC Power.

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