Murrell Residence
- Suburban Grid-Tied Solar Residential System
- System Size: 22.56 kWp
- Completion: 14-Dec-2018
- San Fernando, Pampanga, Philippines
Project Summary
This residential installation was engineered as a fully grid-tied system designed to match daytime household demand while exporting surplus generation to SFELAPCO under net metering. From the beginning, the objective was clear: eliminate electricity bills without compromising comfort.
Installed many years ago, the system has consistently delivered zero billing performance. Rather than oversizing blindly, the layout was calculated around actual consumption patterns, ensuring that daytime production aligned closely with air-conditioning loads and household appliances. Surplus energy flows back to the grid, generating credits that offset evening use. The result has been stable, predictable power costs over the long term.
The homeowner, a retired veteran, prioritized reliability and independence over short-term savings. Comfort was non-negotiable. The system was designed to support full residential living standards without forcing behavioral changes or energy rationing. Over time, as utility tariffs rose, the value of that early decision became even clearer.
This type of long-term residential strategy, including how net metering works, realistic payback expectations, and design considerations for Philippine homes, is explored in greater detail here.
What distinguishes this installation is not simply that it achieved zero billing, but that it has maintained that performance year after year. Longevity in residential solar does not happen by accident. It depends on proper inverter sizing, conservative string design, structural integrity, and ongoing system monitoring. In this case, those fundamentals were addressed correctly from day one.
Today, the home operates with energy stability and reduced exposure to rising grid costs. The system stands as a practical example of how a well-engineered residential solar installation can deliver lasting independence, financial control, and uninterrupted comfort for decades.
System Performance
- System Size: 22.56 kWp
- Annual Generation: 33,276 kWh
- Day Peak Load: 19.18 kW
- Payback/ROI: 4.6 years
Financial Impact
- Daily Savings: ₱1109
- Monthly Savings: ₱33,276
- Annual Savings: ₱399,312
- Lifetime Savings: ₱10,291,130
Technology Partners
- Inverters: SMA Germany SB 6.0
- Modules: SolarWorld Germany
- Monitoring and Control: SMA ennexOS / Sunny Portal
Sustainability Impact
- TREES Planted Lifetime: 1,098
- CO₂ Lifetime: 466 tons
- Houses Powered Annually: 14











