SAN GABRIEL VALLEY · 34.12°N 118.11°W
The house, the system, the power behind it.
Expert guidance for your real estate, smart home, and energy needs in the San Gabriel Valley
12+
Years Experience
200+
Transactions
CalRE# 01951860
Licensed Agent
98%
Satisfaction
SHEET A-1 · REAL ESTATE
SAN MARINO · SOUTH PASADENA · ARCADIA · ALHAMBRA
Homes we actually know.
Our real estate practice is led by Kofen Chang, whose intimate knowledge of the San Gabriel Valley has guided families through some of the most significant transactions of their lives. With a consultative approach grounded in market insight and personal attention, we help clients buy, sell, and invest with clarity and confidence.
- Buyer representation with personalized home search
- Seller services with professional staging and marketing
- Investment property analysis and portfolio guidance
- Deep knowledge of San Marino, South Pasadena, Arcadia, and Alhambra
SHEET E-1 · SMART HOME
HOME ASSISTANT · OPEN SOURCE
A house that runs itself.
Bryan Li designs intelligent living environments using Home Assistant and open-source automation. From lighting scenes and climate control to security systems and energy dashboards, every installation is tailored to how you actually live — not a one-size-fits-all package.
- Home Assistant setup, configuration, and optimization
- Custom automation and sensor integration
- Energy monitoring and smart dashboard design
- Open-source integrations: Moogo, Spintouch, IntelliCenter
SHEET P-1 · ENERGY
EG4 CERTIFIED · SOLAREDGE · ENPHASE
Power from your own roof.
We design and install solar panel systems and battery storage that meaningfully reduce utility costs and increase your home's energy independence. Our expertise spans EG4 battery systems, SolarEdge inverters, and Enphase microinverters — matched precisely to your property and consumption patterns.
- EG4 certified installer — hybrid inverters and battery storage
- SolarEdge and Enphase certified installations
- Custom system design for your energy needs and budget
- Backup power and off-grid solutions
TODAY 41.2 kWh → GRID 12.8 kWh
Get in touch
SHEET S-1 · OPEN SOURCE
6 INTEGRATIONS · 4 LIBRARIES · MIT LICENSED
Open source projects
We develop and maintain open source Home Assistant integrations and Python libraries that connect devices and unlock powerful automation capabilities.
Home Assistant
Complete pool and spa automation with real-time monitoring of water chemistry, temperature, pumps, heaters, and lighting—all controlled from Home Assistant.
Home Assistant
Professional water testing integration that brings lab-grade pool and spa chemistry analysis directly into your smart home dashboard.
Home Assistant
Monitor and control EG4 solar inverters, batteries, and GridBOSS systems with real-time power tracking and intelligent energy automation.
Home Assistant
Automated mosquito misting system integration with weather-aware scheduling, presence detection, and reservoir management.
Home Assistant
Smart mosquito repellent control with zone management, cartridge monitoring, and presence-based activation for outdoor living.
Home Assistant
Smart water heater integration for Rinnai tankless systems with temperature control, usage monitoring, and energy optimization.
“Kofen knew the blocks, the school boundaries, and the tradeoffs before we even asked. We never felt pushed; we felt prepared.”
SHEET C-1 · CONTACT
RESPONSE · 1 BUSINESS DAY
Ready when you are.
Let's start a conversation. Whether you're buying, selling, or exploring smart home solutions, we're here to help.
Get in touch