Alencon’s String Power Optimizers and Transmitters (SPOTs) are the most powerful DC-DC optimizers for utility scale PV applications found on the market today and the best solution for retrofitting PV plant.
can be used in combination with either Alencon’s central inverters, GrIPs or central inverters built by virtually any other major manufacturer.
offer a truly “best of both worlds” solution, offering the granularity of string inverters while allowing you to take advantage of the lower cents per watt cost of a central inverter while maintaining fewer connections to the grid.
SPOT allows to realize the improvement potentials identified by AES PIT, by offering PV plant retrofit solutions, which include the following benefits:
Alencon’s SPOT allows to improve the performance level of an existing plant by helping to compensate low performance sources like accelerated module degradation, poor quality modules etc. by performing maximum power point tracking at the granular string level on up to four separate strings at once.
This is particularly helpful when optimizing power across strings that may have degraded differently over time, have different power ratings or are even from different manufacturers.
Alencon’s SPOTs’ string-wise maximum power point tracking (MPPT) increases the annual electricity generation of an existing plant by about +7%.
Additionally, the retrofit solution allows to step-up voltage to medium voltage DC (MVDC), thereby drastically reducing conduction and line losses and retaining more of the energy harvested from the modules.
By stepping up voltage from lower voltage modules and providing to the inverter constant, optimal voltage, the inverter runs at higher efficiency.
Watch the video simulation shown here to see how all these components fit together to help increase PV energy yield while driving down Balance of System (BoS) costs to deliver lower overall levelized cost of energy (LCOE).