Micro inverter technology provides significant advantages to conventional Solar PV design.Unquestionable advantages include maximised energy yield and flexibility with design and installation, optimal performance in non-ideal conditions and low DC voltage. A micro inverter, converts direct current (DC) to alternating current (AC). The output from several micro-inverters is combined and often fed to the electrical grid. Micro-inverters contrast with conventional string or central inverter devices, which are connected to multiple solar panels.Micro-inverters have several advantages over conventional central inverters. The main advantage being small amounts of shading, debris or snow lines on any one solar panel, or even a complete panel failure, does not disproportionately reduce the output of the entire array. Each micro-inverter harvests optimum power by performing maximum power point tracking for its connected panel.They are also simple to design and stock, as there is normally only a single model of inverter that can be used with any size array and a wide variety of panels.
Micro-inverters that accept DC input from two solar panels, rather than one, are a recent development. They perform independent maximum power point tracking on each connected panel. This reduces equipment cost and makes photovoltaic (PV) systems based on micro-inverters comparable in cost with those using string inverters
Micro Inverters provide power management to individual panels (or groups of two panels) which differs from conventional solar systems. Where conventional systems can sustain significant power loss of the entire array from module failure or shading, a micro inverter system will only affect the panel in question while the remaining panels still function at maximum efficiency. A micro inverter is a miniature inverter which powers only one or two panels opposed to one large inverter at ground level powering an entire array. Each micro inverter is placed on the roof, normally under the solar panels it manages.
Flexibility to expand
Modularity – Expanding the amount of solar modules is simple using micro inverter technology. As customers have more budget or their electricity needs change over time, additional panels can easily be placed essentially expanding the system. Conventional solar systems are typically more constrained when expanding solar modules.
What are the benefits for Micro Inverters
- Panels perform to their maximum potential at any given time – resilient to dust, debris, and shading
- MPPT efficiency greater than 99.5%
- No single point of system failure
- Simplied PV System design and installation
- Performance monitoring for each PV module
- No high voltage DC – safe installation
- Flexibility in panel orientation i.e. panels distributed over north, east and west roof
- Shading will only affect the individual panels opposed to the entire array
- Easier to install, resulting in lower installation costs
- Fault finding and panel performance monitoring
- Allowing panel wattage mismatching (due to unavailability of same panel wattage)
Difference between string inverter and micro inverter configuration
A typical Solar PV Array with central power management
STRING INVERTER: Solar panels connect in a series which connect to a single inverter.
Micro Inverter Solar PV System
MICRO INVERTER: Each micro inverter is connected to one (or two panels) independently managing the power source.
Click Here For The: Micro Inverter Data Specifications
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