Based in Cavite, Philippines. I write up long-running experiments at home — networking, residential solar and battery, EV/PHEV running costs, and whatever else turns into a project worth documenting.
📓 Notes & case studies: marfillaster.github.io
- ⚡ Residential 6.5 kWp solar performance — five months of real generation, self-sufficiency, battery behavior, and bill impact, with monthly tariff math and ROI payback.
- 🔌 Net metering journey in General Trias — getting a 6 kWp rooftop array approved with Meralco: the PEE-sealed A3 SLD, the forms, the venues, the fees, and a ~50-day timeline.
- 📋 Solar application guide for Lancaster New City — the exact CIDC documents to prepare before installing, with a copy-ready Letter of Intent, where to submit, and same-visit gate pass.
- 🚗 BYD Sealion 6 PHEV running cost — full-tank-method tracking turned into a real-world cost-per-km, EV-vs-fuel, and battery-health report.
- 🌐 A usable home network behind residential CGNAT — VLANs, UniFi on the router itself, routed IPv6 over WireGuard, and encrypted DNS, with paste-ready MikroTik snippets.
Most of these are data-driven and AI-assisted: real exported data, analyzed and written up, with the methodology and raw sources published alongside.
🔭 Currently logging refuels and inverter data and seeing what the numbers say.