Mr. Frank Liang / 梁世輝
Country Sales Director
|ABOUT THE SPEAKER|
With the current state of the PV market in Taiwan, the installation business is becoming more competitive. As the cost per watt of PV hardware drops, installers can find it more difficult to stay profitable. Installers are looking for ways to improve their competitiveness and bottom line. Inverter selection can be key to this process.
Inverters account for only about 10% of a PV system’s cost, but they significantly influence soft costs such as permitting, customer acquisition, Balance of System (BoS) costs, labor, and more. The inverter also affects secondary costs, such as monitoring, reporting, and Operation and Maintenance (O&M). The SolarEdge DC optimized inverter solution can reduce these costs and as such, can help installers to optimize their business.
Traditional PV inverters have two main functions: converting DC to AC and tracking the maximum power point for the string. However, by splitting the traditional inverter functionality into two functions, the power optimizer to maximize energy production for each module and a simplified inverter that is only responsible for DC-AC inversion and grid management, SolarEdge was able to overcome the inherent drawbacks of traditional inverters. This new solution offers system owners many benefits, but it also provides value for installers.
Connecting each module to a power optimizer allows the modules to produce at their individual maximum production potential. The maximum power harvesting from each module offers more energy by mitigating module-level mismatch. With the SolarEdge DC optimized inverter, installers and system owners benefit from constraint-free design. In a SolarEdge system, the string voltage is always fixed, regardless of temperature or string length, allowing longer strings and reduced BoS cost. This means that with SolarEdge, installers can design systems with parallel strings of unequal lengths, multiple module orientations and capacities, and layouts in a single string. This design simplicity allows installers to be significantly more time efficient in designing PV systems. The design flexibility also allows for longer strings of up to 12.75kWp per string. These longer strings allow for fewer strings to be installed and ultimately reduce BoS costs by up to 50%.
Another important aspect in PV systems is safety. With the SolarEdge DC optimised inverter, its SafeDC™ technology is embedded into the system – without any additional costs or design required. In a SolarEdge system, whenever AC power is off, DC voltage wires are reduced to a safe level. Power optimizers decrease the DC voltage in the PV wires to protect installers, maintenance personnel, and firefighters.
As PV systems age, a growing cost to both system owners and installation companies is Operation & Maintenance (O&M). However, with SolarEdge’s free cloud-based, module-level monitoring platform, this can turn a potential drawback into an opportunity. With module-level performance monitoring, automatic alerts, and remote troubleshooting, installers benefit from less trips to sites, less time spent on site, and system owners have a higher system uptime.