?? String inverters feasible for any roof ?? ?? ??

PV system design can be challenging. Complex roof shapes, shade, and obstructions require unique designs to offer high-performing systems.

Many installation companies standardize their designs or use expensive inverter technologies that seem to provide one-fits-all solutions. But this approach can be costly and complex.??

With the inverter playing a pivotal role when designing a system, exploring all options available on the market is worthwhile. Modern string inverters provide high flexibility while keeping cost and complexity low. ??

Fronius focuses on design flexibility and offers "SuperFlex Design" features that allow installers to choose a string inverter for any application. From single-phase residential to large three-phase commercial systems, from multiple roof angles to specific module counts for carports and trackers. ??

SuperFlex Design combines hardware and software features integrated into the string inverter, offering:

?? Wide voltage windows allow you to design systems from incredibly low start-up voltages (as low as 80V or three modules) up to the maximum DC voltage allowed by the code.

?? For example, the Fronius Primo single-phase inverter can handle up to 1,000V in non-residential systems. This voltage allows for a maximum number of modules in one string and reduces system costs.

?? Multiple power point trackers (MPPT) allow for different orientations or tilts, no matter if it's a simple east/west design with two symmetric arrays, an asymmetric design with a small sub-array, or a partially shaded system.

?? Split the system among the independent trackers as needed, from a 50/50 split to a 33/66 split. Using inverters with two MPP trackers makes sense if a sub-array only has one orientation and no shading.

This flexibility enables the connection of virtually any number of modules and thus ensures optimal use of the given roof space. ????

??Overdimensioning & maximum current carrying capacity. The maximum generator output can be over-dimensioned to 150% since the peak output of the PV generator is barely ever reached. With oversizing, the system produces more energy throughout the whole year.?? But that's not all: if, for example, the situation results in two arrays with the same tilt and number of modules (for example, East/West facing), then these two arrays can be connected to MPPT 1 due to the high current carrying capacity, and the small second array to MPPT2.

?? Due to the innovative Active Cooling technology, Fronius inverters can handle very high currents because the cooling technology mitigates the temperature effects of higher currents.??

????Shade mitigation with an intelligent software algorithm. Fronius inverters deliver maximum flexibility even with partial shading of the module array. The Dynamic Peak Manager always obtains the maximum energy from the PV modules, meaning that roof areas with partial shading are no problem.

??This highly efficient MPP tracking algorithm detects any shade and optimizes the yield at the string level. No additional, sensitive components are needed at the module level, as the inverter has the feature integrated. ????

This approach costs less because there are fewer system components. It also keeps installation and service costs to a minimum. ??

?? Design flexibility in modern string inverters comes from a set of features that goes far beyond the number of MPP trackers.

?? Fronius' SnapINverters are a prime example of how flexible an inverter can be when multiple MPP trackers, active cooling technology, and software-based shade mitigation are combined - making Fronius SnapINverters super-flexible and a solution for any project.

Get in touch to learn to use these features and differentiate your business from the rest.

*Photo credit: Landmark Supermarket case study, read here.