Power & Energy Systems
Reliable Backup Power and Energy Storage for San Diego Homes and Businesses
When the grid goes down or energy costs spike, you need systems in place that keep your home or facility powered and protected. At Williams Mechanical, we install and service advanced power and energy systems designed to give you greater control, security, and efficiency. Whether you're preparing for outages, adding energy storage to your solar setup, or seeking full backup capabilities, our team brings licensed expertise and proven technology to every install.
We specialize in Generac generators, EG4 lithium battery systems, and Fortress Power batteries, delivering tailored solutions for residential and commercial properties across San Diego County.
Generac Generator Installation
Automatic Backup Power When You Need It Most
Generac is one of the most trusted names in standby generators. We install automatic whole-home and essential-circuit Generac systems that detect outages and restore power in seconds, keeping your lights, appliances, HVAC, and critical systems running.
Key Benefits:
- Seamless backup power without manual intervention
- Natural gas or propane fuel options
- Reliable protection during outages or rolling blackouts
- Optional Wi-Fi monitoring and mobile app control
- Ideal for homes, businesses, and medical or mission-critical facilities
We handle the full installation process including gas connections, transfer switch installation, and permitting. Whether you're backing up a few rooms or your entire property, Williams Mechanical ensures your Generac system is sized and installed for dependable performance.
EG4 Lithium Battery Systems
Affordable, Scalable Energy Storage for Homes and Off-Grid Applications
EG4 battery systems offer flexible, modular storage for residential energy needs. Whether paired with solar or used as part of a hybrid or off-grid system, EG4 delivers dependable lithium storage with built-in efficiency.
Why Choose EG4 Batteries:
- 48V rack-mounted LiFePO₄ (lithium iron phosphate) chemistry
- High cycle life and deep discharge capacity
- Compatible with solar inverters and generator integration
- Excellent value for homeowners seeking battery backup
- Scalable design with easy expansion as energy needs grow
EG4 is an ideal choice for budget-conscious homeowners who want solid performance without sacrificing quality. We install EG4 systems for solar backup, time-of-use savings, or off-grid functionality.
Fortress Power Battery Systems
High-Performance Storage for Whole-Home Backup and Energy Independence
When you need advanced storage and premium performance, Fortress Power offers a powerful solution. These lithium battery systems are engineered for full-home backup, large solar systems, and critical energy management applications.
Fortress Battery Features:
- Large storage capacity for full-home backup
- Safe, stable LiFePO₄ chemistry with long cycle life
- Compatible with leading hybrid and off-grid inverters
- Built-in battery management system (BMS) for smart protection
- UL 9540 and UL 1973 certified for safety and compliance
Fortress Power is ideal for homeowners or businesses looking to reduce grid dependence, achieve energy independence, or protect sensitive operations from interruptions.
Complete Energy System Design and Installation
Every property is different. We design energy systems that match your power needs, lifestyle, and long-term goals.
Our process includes:
- On-site load analysis and system sizing
- Evaluation of solar compatibility and usage patterns
- Integration with existing panels, solar arrays, and generators
- Permitting, compliance, and safe, clean installation
- System monitoring and support after installation
Whether you're installing a backup generator, a home battery system, or combining both with solar, we create a seamless, dependable setup built for your environment.
Why Choose Williams Mechanical?
- Licensed C10 Electrical Contractor
- Local experience with San Diego building codes and permitting
- Trusted installation of Generac, EG4, and Fortress Power products
- Clean, code-compliant work and expert system design
- Full integration with HVAC, solar, and plumbing systems
We bring more than just power storage. We bring whole-home energy solutions.
