Hawaii Residential Solar
Oahu Electric & Air provides complete residential solar solutions—from design and permitting to full system installation and interconnection.
Our licensed team handles everything in-house, ensuring your project meets local utility and state requirements while delivering maximum efficiency and reliability.
Whether it’s a new build or an upgrade to an existing home, we manage every step of the process so your system is installed right, on time, and to code.
Start generating today
we specialize in installing residential solar systems across the island, focusing primarily on battery systems for optimal efficiency. We take care of all the necessary permits and paperwork, ensuring that you receive any available rebates or tax credits without the hassle. Our extensive warranty on all labor means you can start generating clean energy with peace of mind, knowing you’re covered. Let us help you make the switch to solar and enjoy the benefits for years to come!
Financing Options
Take advantage of federal tax credits, state incentives, and flexible commercial financing options designed to maximize ROI.
Whether you’re looking to reduce costs or meet energy benchmarks, we’ll help you choose the right path forward.
Battery Storage
We’re certified installers for Tesla Powerwall homeowners reliable backup power and energy independence.
Tesla's storage system integrate seamlessly with your solar setup, keeping your home powered during outages and optimizing energy use throughout the day.
From consultation to installation, we design each system around your energy goals, budget, and home layout.​
Battery Storage
Whole-home backup
protection and increased
electricity bill savings
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Home Battery Storage Systems
Home battery storage allows you to store excess solar energy produced during the day and use it later when the sun isn’t shining or when the power grid goes down. In Hawaii, battery systems are commonly added to solar to improve reliability, reduce reliance on the utility, and provide backup power during outages.
Oahu Electric & Air designs battery systems that integrate directly with residential solar and electrical systems, tailored to how each home actually uses energy.
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How Home Battery Storage Works
During the day, solar panels supply power to the home first. Any excess energy is stored in the battery instead of being sent back to the grid. When solar production drops—at night, during cloudy weather, or during an outage—the home draws power from the battery automatically.
The system continuously manages the flow of power between solar, battery, and the utility, without requiring homeowner input.
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Battery Capacity and System Sizing
Each battery provides approximately 13.4 kWh of usable energy, which is enough to support essential household loads for several hours. Multiple batteries can be installed together to increase total storage capacity, allowing systems to be scaled for partial-home or expanded whole-home backup.
System size depends on:
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Which circuits you want backed up
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How long you want power during an outage
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Daily energy usage patterns
Proper load planning is critical to performance.
Power and Performance
Battery systems are designed to supply both continuous and peak residential loads when properly configured. They support daily charging and discharging and are engineered to operate efficiently without damaging the battery over time.
When paired with solar, batteries can reduce evening grid usage and help stabilize power during high-demand periods.
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Installation and Environmental Design
Battery systems are approved for indoor or outdoor installation and are built to handle Hawaii’s heat, humidity, and coastal conditions. The enclosure is sealed, weather-resistant, and designed for safe residential use.
Systems can be installed with new solar or added to many existing solar setups.
Safety and Monitoring
Modern home batteries are fully enclosed with integrated protection systems and no exposed wiring. Operation is monitored in real time through a mobile app, allowing homeowners to view battery charge level, power flow, and system status at any time.
During a grid outage, the system automatically disconnects from the utility and supplies backup power without interruption.
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Warranty and Long-Term Use
Battery systems include a 10-year manufacturer warranty with guaranteed capacity retention over the warranty period. They are designed for long-term daily cycling as well as backup operation, making them suitable for both energy management and emergency use.
Why Homeowners Add Battery Storage
Homeowners typically add battery storage to:
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Maintain power during outages
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Increase solar self-consumption
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Reduce reliance on the utility grid
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Protect against rising energy costs
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Improve overall energy resilience
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Summary
Home battery storage adds flexibility, reliability, and control to a residential solar system. When properly designed and installed, it allows homeowners to make better use of their solar energy while providing dependable backup power.
At Oahu Electric & Air, battery systems are designed around the home’s electrical layout, usage patterns, and long-term goals—not just equipment size.
