Also, the position of the sun has different effects on such vertically mounted solar panels than it would have on a rooftop array. Furthermore, there often is very little or no space behind the facade for mounting an inverter, and later it can become difficult to access the back of the panels for maintenance of the electrical components.
For that reason, special small inverters are used for solar facades which connect two panels in parallel rather than many panels in one serial string. This keeps the DC voltage fairly low, thus strongly reducing the risk of voltage surges or electrical arcs near the panels.
It also makes sense to use so-called DC optimizers or panel inverters (micro inverters). Connecting solar facades to conventional string inverters is usually not possible. Because of the wiring of the panels, it is necessary to consult a competent specialist when planning a solar facade. (HS)
Look at this, too:
Solar advice: String inverters vs. substations?
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