Greenergystar 110V 1200W MPPT Micro Grid Tie Inverter For Solar Panel

Description

110V 1200W
MPPT Micro Grid Tie Inverter
For Solar Panel
Features:
Maximum Power Point Tracking (MPPT) to optimize output power
FOUR indendent MPPT input circuit allows power optimization on 4 sets of solar panel
Standard MC4 input ports for easy and safe installation
Stackable to another micro inverter with the included power cable
Pure sine wave output
Anti-Island Protection: Inverter will stop output during black out
Over-temperature, short circuit, and overload protection
IP65 Waterproof Rating
Input Specifications:
Recommended PV Modules
300W x 4 sets
Maximum DC input Range
50V
MPPT Voltage Range
14-20V / 25-40V
Operation Voltage Range
10.5-30V / 22-50V
Individual Circuit Maximum Input Current
20A
Output Specifications:
Output Voltage
@120VAC
Peak Power Output
1200W
Rated Output Power
1150W
Rated Output Current
9.58A
Rated Voltage Range
90-160VAC
Rated Frequency Range
50/60Hz Auto
Power Factor
>98%
Maximum units per Branch Circuit
3 Units (single phase)
Maximum Current per Branch Circuit
30A
Efficiency
MPPT Efficiency
99.5%
Maximum Output Efficiency
92%
Night Power Consumption
<50mW Max
Anti Island Protection
Yes, Inverter will disconnect from grid during black out
Output Current Waveform
Pure Sine Wave
Mechanical Specifications:
Ambient Temperature Range
-40'C - 60'C
Operating temperature range
-40'C - 82'C
Dimension (L x W x H)
370 x 305 x 38 mm
14.56 " x 12" x 1.50"
Weight
2.85kg
6.28lb
Waterproofrating
IP65
Cooling
Natural Convection
Casing
High quality finned aluminum to act as heat sink for fast heat dissipation
Display
1 Red LED
Other Specifications
Power Transmission
Reverse Transfer, Prirotiy Loads first
Electromagnetic Compatibility
EN50081.part1 / EN50085.part1
Grid Distrubance
EN61000-3-2 Safety EN62109
Grid Detection
DIN VDE 1026 UL1741
What are included:
1X 1200W Micro Grid-tie Inverter
1X AC Cable
Instruction manual
Mounting Bracket
Screws
Maximum Power Point Tracking (MPPT):
What is Maximum Power Point Tracking (MPPT)? MPPT is a techinque we implemented to get the maximum possible power from a solar panel. When trying to characterize the output of a solar panel mathematically, it can be represented by an IV-Curve (shown below). The equation for Power is
P = IV
. Where
I
is the
Current
,
V
is the
Voltage
, and
P
is the possible output
Power
. Each point on the curve is a possible combination for output power and our goal is to find the best combination to obtain maximum power.
In simple terms, we are trying to get the biggest rectangle to fit under this so called IV-Curve, the bigger rectangle we can fit, the more power we get. Below are graphs to help you understand the idea better. This is a comparison between inverters with and without MPPT on an 85W solar panel. Please note that different solar panels will have slightly different IV-Curves.
No Tracking Vs Tracking
Figure 1
No MPPT, with voltage fixed 17.5V
P = 17.5V x 4.6A =
80.5W
Figure 2
With MPPT, amount of current and voltage to draw are calculated
P = 17V x 4.95A =
84.15W
As we can see, Figure 2 is able to 84.15W with MPPT while in Figure 1, we can only get 80.5W. This is 4.5% increase in power output. Why do we care? Because solar panels are still quite expensive these days, and the increased power output will directly affect our return on investment (ROI). In addition, depending on weather, time of the day and amount of solar irradiation the panel receives, the IV curve will move along the Y-axis to reflect the possible increase / decrease in potential power output, and cause the maximum power point to shift along as well. Coming up are illustrations to visualize this idea.
IV-Curves Under different weather conditions
Figure 3.
Sunny, Clear Sky days in Summer
600 ~ 1000 W/m2
No MPPT
MPPT
Power
80.5W
84.15W
Color
Red
&
Yellow
Yellow
&
Green
Percent
N/A
+4.5%
Figure 4.
Scattered Clouds or Partly Cloudy days in Summer
300 ~ 600 W/m2
No MPPT
MPPT
Power
42.0W
46.4W
Color
Red
&
Yellow
Yellow
&
Green
Percent
N/A
+10.5%
Figure 5.
Cloudy or fog days, dawn or dusk in Summer
100 ~ 300 W/m2
No MPPT
MPPT
Power
5.25W
14.25W
Color
Red
&
Yellow
Yellow
&
Green
Percent
N/A
+171%
Figure 3 - 5 illustrate the power gain in different weather condition with MPPT compare to a non-tracking inverter that locks voltage at 17.5V. While 17.5V is randomly chosen, it does show what would happen in real life when there is not MPPT. Studies have shown, by making use of MPPT, there will be an average of 30% increase in power production. Since the maximum power point is a variable, we have implemented a tracking algorithm that utilizes the micro processing power of our inverter to calculate the optimum voltage and current to maximize our energy harvest.
Increased Power Rating:
In 2008, when we designed the first generation inverter, what we had in mind was an inexpensive device to allow the public to have a chance to test out renewable energy production and promote the green movement at an affordable price range. As people's environmental awareness increased over the years, the demand for bigger systems also increase. Therefore, once again, the power of this inverter has increased to accomodate market demand.
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