Commercial Solar Installations

Even though microinverters are not traditionally the first choice for commercial installations, Darfon microinverters have many advantages over string inverters. Darfon microinverter systems are easier to design, safer to install, maximize energy production, have lower installation costs and minimize operation overhead.
microinverter system layout With Darfon microinverters, there are no layout limitations as in string inverters. Since modules are wired in parallel, production is not restricted by low-performing modules, and the need to avoid spaces next to AC units or other shaded locations is less critical. There is also no need to balance DC strings. Each microinverter circuit is connected individually to the module and having unbalanced DC strings doesn't affect energy production. Thus, the design and layout become much more intuitive and easier to deal with and it can easily be expanded to fit future needs. Additional panels and microinverters can simply be added without redesigning the system, overcoming the "all or nothing" weakness of string inverters.
String inverter commercial systems are more difficult to manage due to the potential hazard of high-voltage electricity to the system and its personnel. String inverter systems have high voltage DC wiring that can carry up to 1500Vdc even without a grid connection and requires additional hardware for rapid shutdown requirements. Whereas in Darfon microinverter commercial systems, the DC to AC conversion is completed at each individual panel so there is no need for DC wiring and rapid shutdown requirements are met without any additional hardware. Darfon microinverter systems also use standard AC connections so installers do not need to worry about polarity.
In string inverters systems, solar modules are tied in a series circuit so production is only as good as its lowest-performing panel and can lose anywhere from 15 to 30 percent or more due to shading or debris. In the case of Darfon microinverters, they are connected in parallel so any shading or debris only affect individual panels and not the entire system, ensuring maximum energy production from available light.
Wiring takes up a large portion in the BOS cost of installation. Unlike string inverters, microinverters do not require DC wiring so there are savings in both material and labor cost. Some microinverter and string inverter also require neutral conductors and wiring, but not Darfon microinverters, which reduces as much as one quarter of the AC wiring cost.
The larger the PV system, the higher the maintenance cost. With string inverters, monitoring solutions can only measure the performance of the entire array. If the system is not producing the expected power, each individual solar panel will need to be checked to determine the cause. With Darfon’s monitoring system, individual performance is tracked to determine if a panel or microinverter requires maintenance, saving both money and manpower. And since it is cloud-based, Darfon’s monitoring system can be accessed from anywhere in the world, through a web portal, an Android or iOS mobile app.
Learn More About G320Why use Darfon for commercial installations in lieu of other microinverters brands? Darfon’s third generation microinverter, the G320 was built to be powerful, reliable and lower overall system costs.
The Darfon G320 microinverter is the solution for today’s high-power solar modules. With increasing power output from PV modules, many microinverters cannot handle them without clipping and clipping does matter. The G320 can handle both 60- and 72-cell modules up to 350W DC and outputs up to 300W AC. This means system designs can be built using the modules and inverters to satisfy the site requirements not the inverter requirements.
In the past, the reliability of microinverters has been questioned. But question it no longer with the G320. Its case has been designed to dissipate heat to increase the longevity of the product. It also features a redundancy capacitor design that continues working even if some of the electrolytic capacitors have problems over time. The G320 is backed with a standard 25-year warranty option.
microinverter system layoutDarfon microinverter systems use AC trunk cable with 10# AWG conductors allowing for a higher microinverter count per circuit and lowering BOS installation cost. Using the G320, up to 66 microinverters can be installed on a single 3-phase 30 amp circuit breaker. The Darfon G320 microinverter has 3-phase configuration designed to accommodate the electrical distribution systems of most commercial buildings and to reduce, if not eliminate, the need for expensive transformers.

An optional 10-year warranty is available at a lower cost to accommodate commercial installers that prefer a lower upfront cost.
Back to Top