marfillaster · notes
Long-running experiments, written down.
Field log · 2026-05
Net Metering Journey in General Trias
A realistic, step-by-step account of getting a 6 kWp rooftop array approved for net metering with Meralco in Cavite — the PEE-sealed A3 SLD, the forms, the venues, the fees, and a ~50-day timeline.
Build log · 2026-05
Building a usable home network behind residential CGNAT
VLANs, a UniFi controller running on the router itself, routed IPv6 over WireGuard, and encrypted DNS. Reproducible, paste-ready snippets for the MikroTik RB5009.
Case study · 2026-05
BYD Sealion 6 PHEV running cost — Cavite, Philippines
5,123 km of odometer- and meter-tracked driving: electric-vs-fuel running cost, 63% EV usage split, combined 6.0 L/100km efficiency, and battery health.
Case study · 2026-04
Residential 6.5 kWp solar performance — Cavite, Philippines
Five months of real generation, self-sufficiency, battery behavior, and bill impact from a 6.5 kWp / 14.3 kWh / 8 kW system, with monthly tariff math and ROI payback.
Guide · 2025-12
Solar Panel Installation Application Guide for Lancaster New City
The exact CIDC documents to prepare before installing solar panels on your Lancaster New City unit — with a copy-ready Letter of Intent template, where to submit, and how to get your gate pass on the same visit.
About
Ken Marfilla
Based in Cavite, Philippines. These notes are personal build logs and case studies from long-running experiments at home — networking behind residential CGNAT, residential solar and battery, and whatever else turns into a project worth writing down.
Find me on GitHub.