The 27.02 kWp Eriguel Residence system in Marikina is a fully net-metered installation serving a household with substantial daytime and overall electricity demand. Available roof area, rather than energy demand, was the main factor limiting system size, so the array was not intended to eliminate the property’s entire electricity bill. It nevertheless offsets a significant share of daytime consumption from air-conditioning, pool equipment, office use and normal household loads.

The roof itself creates an important maintenance consideration. With a pitch of only around 1%, rainwater does not wash dust and debris from the modules as effectively as it would on a steeper array. Regular cleaning is therefore particularly important at this site to maintain output and prevent soiling losses from accumulating over time.

The system has performed in line with expectations since commissioning in 2021. The original SMA inverters and Trina Solar modules remain fully operational and have proved remarkably reliable. The project is a useful example of why good solar design is not always about installing enough capacity to reach a zero bill: roof geometry and usable area can set a practical ceiling even where the household could economically consume more solar generation.