**4. Converter Requirements**

The discussion in Section 2.8 has led to the insight that a parallel power optimizer (PPO) approach is the most appropriate method to tackle the requirements that were set forward in Section 2. However, the previous analysis has shown that up to this date, the majority of BIPV installations still employ the more traditional string inverters to interconnect the BIPV modules. This section focuses on the specific requirements of a PPO for use in BIPV modules as an MLC. Every MLC is connected in parallel to the LVDC grid (the common DC bus) as shown in Figure 1d.
