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Improving Economics of Solar
through Technology Innovation

igrenEnergi’s 8-module Solar DC Optimizer boosts lifetime energy production by minimizing losses caused by module mismatch. Each solar Optimizer connects to 8 modules independently, operates each at its maximum power point (MPP) and draws out their highest power at all times. Optimization maximises energy output and eliminates the system-wide propagation of losses from few underperforming modules. An online analytics platform with module wise generation data enables close monitoring of system performance, early diagnosis and rapid resolution of problems.
 
igrenEnergi’s Optimizer recovers up to 80% of energy lost by the system due to mismatches.
 

Top Optimizer Benefits

Harvest more energy

Output of entire string is reduced by single weak module.
igrenEnergi Optimizer ensures that each module is always operated at its maximum power point (MPP). Hence minimizing series mismatch losses and increasing energy output from the system.

Monitor output effectively

Optimizer monitors the performance of each individual module, providing extra-ordinary visibility and control of system performance. Pin pointed alerts enable immediate fault identification and quick resolution, leading to higher uptime.

Analytics platform provides actionable intelligence with custom reports and alerts for top management, project managers and O&M team.

Protect your solar investment

Single management dashboard for multiple sites ensures best performance from all sites. Individual module monitoring enables easy enforcement of warranties. Optimizer provides future compatibility as new modules can be used in same string with old ones.

Assure safety

Lower and regulated DC voltages minimize fire and accident risk. Module level shut down capability with software and manual control enables rapid response in emergencies.

Future proof your project

The configurable design and software controlled operations make the igrenEnergi Solar Optimizer inverter and modules agnostic. Ensuring future compatibility with and harnessing of future equipment capabilities.

Module Mismatch and economics of solar

ROIs of most solar projects under perform against plans due to unforeseen drops in actual energy output. An important and often unidentified cause is the negative impact of mismatched modules in the array. Module mismatch creeps in due to several independent and uncontrollable factors such as non-uniform age related degradation, shading (clouds, objects and structures), temperature variance, dirt, dust, pollution etc. When series connected in strings, losses of mismatched modules are propagated system-wide resulting in 10-20% losses in lifetime energy production. Conventional inverter technology is not designed to diagnose or address this problem.

 

Causes of Module Mismatch

Widespread instances of module mismatch within an array are inevitable in any solar project. Since the underlying factors are unpredictable and difficult to model, they work in invisible ways to sap the energy output. Major reasons for mismatch are explained below.

Uneven degradation – Individual modules degrade at a non-uniform rate, creating mismatch within a string. System losses after few years can be substantially higher than manufacturer provided averages.

Manufacturer variances – Impact of mismatch due to in built capacity variances can be mitigated by careful selection, but not entirely eliminated. Initial mismatch is compounded by uneven aging.
Shading – Shadows cast by towers, poles, structures, clouds can have a disproportionate impact. A single pole shadow can reduce the output by 30%.
Soiling – radual accumulation of dust, dirt, bird droppings across modules produces mismatch. Annual losses can exceed 15%. Manual cleaning processes by remote and under supervised teams are imperfect and partially effective.
Temperature Variance – Differing air-flows results in uneven cooling, differing insolation results in uneven heating. Up to a 0.5% efficiency loss can be caused per 1 degree of temperature variance.
Potential induced degradation (PID) – Can lead to substantial power losses of as much as 30%. Despite manufacturer assurances, instances of PID continue to be frequently discovered.

Module mismatch saps system energy

A module produces maximum power at exactly one voltage and current value – the “Maximum Power Point” (MPP). MPP characteristics vary from module to module because of a variety of reasons. In order to optimize output, solar inverters use “maximum power point tracking” (MPPT) to continually operate the system at its peak efficiency point.

 

The drawback to this approach is that MPPT algorithm can only be applied to the string as a whole. Because the I-V curve is non-linear and the modules are wired in series, a small change in a single module performance causes the string MPP to change and move the rest of the modules away from their best performance. Hence minor power mismatch in few PV modules can lead to a drastic and disproportionate loss of power from the entire array.

How igrenEnergi Optimizer works

Each igrenEnergi Optimizer connects to 8 modules and allows all modules to independently operate a maximum power point tracking algorithm, ensuring that each module is producing the greatest amount of energy possible while getting the benefit of the higher DC voltages of string inverters and subsequent higher efficiencies. As the modules are no longer connected in series, the negative impact of underperforming modules is eliminated. Since each module is managed and monitored individually, this arrangement allows unprecedented benefits in increased output, safety, versatility in the system design and higher resolution monitoring.

 

Technology

igrenEnergi’s roadmap of innovative products is designed to solve unaddressed industry pain points. The ‘Energy Packetization Architecture’ is a pioneering approach in managing the generation, conversion and utilization of energy. The technology involves ‘packetization’ of incoming power; software enabled ‘processing, routing and scheduling’ of the same and finally load specific ‘recombination of packets’ to deliver required output. Our products, built on this framework, deliver significantly higher energy output per unit cost as compared to existing options. If you would like to learn more about Energy Packetization, and independently develop products using it, please contact us at info@igrenEnergi.com