SolarEdge Distributed MPPT Grid-Tie Inverter System
The SolarEdge distributed grid tie inverter system combines module-level maximum power point tracking (MPPT), DC-DC power optimizers, and monitoring with high-efficiency transformerless string inverters to maximize the energy yield of a PV installation. The SolarEdge system provides design flexibility by mitigating shading, module mismatch, uneven soiling, and aging variance losses. It automatically maintains a fixed string voltage so the inverter operates at peak efficiency regardless of string size, shading, or temperature. This allows flexible string lengths ranging from 8 to 25 modules for single-phase and 16 to 50 for three-phase inverters as well as varying module sizes, tilts, and orientations. The system is scalable and simplifies expansions and replacements since future modules need not electrically match existing ones. Fewer but longer strings can also reduce DC-side balance-of-system (BOS) requirements.
SolarEdge inverters are ungrounded (non-isolated) on the DC side, so all PV array wiring must use PV Wire (including factory-installed module wire leads). The SolarEdge power optimizers have a 25-year warranty, and the SolarEdge inverters have a 12-year warranty (extendable to 20 or 25 years). Power optimizers and inverters are listed to UL 1741 for the U.S. and Canada.