Philippines Microgrids Bring Sustainable Energy to Villages — A HOMER Pro Case Study

 The following is the first in the new Microgrid News & Insight feature, “A HOMER Pro Case Study.”

 Many communities in The Philippines lack reliable access to affordable power.Many communities in The Philippines lack access to affordable power.

HOMER Pro Makes Rural Philippines Microgrids Reliable at Lower Cost

The Challenge

Shell Foundation, Philippines, recently hired consultant Silver Navarro to assist its Dutch consultant with an Access to Energy program promoting Philippines microgrids. The program’s purpose is designing an off-grid power system that the community can sustainably operate and maintain to meet its basic electricity requirement.  Navarro’s project was for a community that already possessed several donated diesel gensets, but the cost of fuel made reliable power unaffordable. Delivery delays were an added fuel challenge as the nearby river floods on  rainy days. Rainy days do benefit the community’s low-head pico hydro turbine, but water flow is insufficient during summer months.

“Solar PV was an obvious solution to the hydropower deficiency,” says Navarro. Battery sizing is very important due to the high initial cost, but more importantly to the ongoing replacement costs for the batteries.

The Solution

“Using HOMER Pro as a design tool for simulation and optimization,” explains Navarro,  “the sizes of the power components were selected properly to meet the capacity and energy requirement of the community with the lowest operating and replacement costs.” Navarro’s video goes into more detail about the project. 

The Future

Navarro believes HOMER Pro is an essential tool for optimizing existing Philippine power systems. These are primarily fossil-based generating systems that can be hybridized with PV and wind, then augmented with an energy storage system to reduce operating costs, he says. He further explains that the Small Power Utilities Group of the Philippines’ National Power Corporation (NPC-SPUG) currently operates 529 of these generating units. Only 44% provide 24-hour electricity, with an average of only 18 hours. The high operating costs are passed on to consumers in their electric bills.

The government’s objective is to make electricity available 24 hours a day and  lower consumer costs by hybridization with renewables and optimizing operation. Navarro is enthusiastic about using HOMER Pro to build capacity within NPC-SPUG in the same way it helped the Shell Foundation project.



Silver Navarro

This installment was submitted by Silverio “Silver” Navarro, Jr., a Philippines-based independent renewable energy consultant  who  uses Homer Pro as a tool in designing clients’ systems and performing  analyses. His services include resource assessment, energy audit, power system design, techno-financial analysis, project implementation and management, and performance monitoring, among others.

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