FranklinWH home battery system mounted on exterior wall with warm living space visible

Battery storage for Oklahoma homes

Three systems. Every budget. Backup power that keeps your home running when the grid goes down.

How It Works

Solar charges your battery. Your battery powers your home.

Solar panels charge the battery during the day. The battery powers your home at night or during outages. Excess energy goes to the grid for credits. When the battery is low, your home pulls from the grid as backup.

Why Battery Storage

Oklahoma storms don't wait. Neither should your backup plan.

Oklahoma ranks in the top 5 states for severe weather events. Ice storms, tornadoes and straight-line winds knock out power for hours or days. A battery keeps your refrigerator running, your sump pump working and your family comfortable while your neighbors wait for the grid.

Solar panels shut off during a grid outage. It's a safety feature to protect line workers. A battery disconnects your home from the grid and lets your panels keep producing. Your home runs on stored solar while the grid is down.

With $246M in approved rate increases and another $597M pending, storing your own solar energy instead of selling it back at a blended credit rate is becoming the smarter play. Use your power when you need it, on your schedule.

Top 5

Oklahoma's rank for severe weather events

<20ms

Automatic switchover during outage

10-15

Year battery warranties

Equipment

Three systems. Every budget.

EG4 PowerPro ESS

✓ Up to 30.72 kWh (stackable)
✓ 12 kW continuous output
✓ Built-in MPPT charge controllers
✓ 200A transfer switch capable
✓ 10-year warranty

Best for homeowners who want reliable backup at the lowest cost per kWh. Also the foundation of our off-grid solar systems.

Tesla Powerwall 3

✓ 13.5 kWh usable capacity
✓ 11.5 kW continuous (22 kW peak)
✓ Integrated solar inverter
✓ Storm Watch weather alerts
✓ 10-year warranty

Best for whole-home backup with app control and weather-aware charging. Pre-charges before Oklahoma storms.

FranklinWH aPower 2

✓ 15 kWh per unit (stackable)
✓ 10 kW continuous (15 kW peak)
✓ Generator integration
✓ Circuit-level energy management
✓ 15-year warranty

Best for homeowners who want the longest warranty, generator backup and total control over every circuit.

If you want the full tradeoff breakdown between these systems, see Tesla Powerwall vs FranklinWH and EG4 vs Tesla Powerwall.

Built for This

Whole-home backup or essentials only. Your call.

Every battery system we install can be configured two ways. Whole-home backup covers everything: your AC, appliances, lights, garage. Essential backup covers the circuits that matter most: refrigerator, medical equipment, lights, internet.

Whole-home requires more battery capacity (and costs more). Essential backup stretches a single battery through a multi-day outage. We help you decide what makes sense based on how much coverage you want and how often your area loses power.

All three systems switch over in under 20 milliseconds. You won't even notice the grid went down. Your lights stay on, your food stays cold and your home stays connected.

Process

From consultation to backup power

Free Consultation

We review your utility bills, outage history and energy goals. If you already have solar, we assess how your existing system integrates with a battery.

System Design

We map your critical loads, outage goals, and budget to a specific battery size and backup strategy. You see exactly what changes between essential backup and whole-home backup before you commit.

Permits and Paperwork

We handle electrical permits, utility interconnection and any HOA requirements. You sign once. We take it from there.

Installation

Battery installs typically take 1-2 days. We mount the unit, wire it to your panel and configure your backup circuits. Full cleanup when we leave.

Activation and Training

We commission the system, verify the switchover works and walk you through the app. You'll see your battery charge level, energy flow and backup status in real time.

Not sure which battery is right for your home?

We’ll review your energy usage, outage history, and budget, then show you which battery setups fit your home and what each one changes.

Talk to Us

Common Questions

Battery storage FAQ

Can I install a battery without solar panels? +

Yes. All three batteries we install (EG4, Tesla Powerwall 3, FranklinWH) can charge from the grid alone. This gives you backup power during outages. But the economics are better with solar: you're storing free energy from your roof instead of buying from OG&E or PSO at 13+ cents/kWh to fill the battery. About 80% of our battery customers pair with solar.

How long will a battery power my home during an outage? +

Depends on what you're powering. A single 13.5 kWh battery running essential loads (fridge, lights, internet, phone chargers) can last 12-24 hours. Add solar panels and the battery recharges during the day, extending backup indefinitely as long as the sun shines. Whole-home backup draws more power and drains faster, which is why we help you choose the right configuration.

Should I back up my whole house or just essential circuits? +

It depends on what you're willing to go without during an outage. Essential backup (fridge, lights, internet, medical equipment) keeps one battery running 12-24 hours. Whole-home backup (including AC, dryer, oven) needs 2-3 batteries and drains faster. In Oklahoma, most ice storm outages last 1-3 days. We size the system to match your risk tolerance and budget during the site assessment.

I already have solar. Can I retrofit a battery? +

Almost always. The Tesla Powerwall 3 and FranklinWH are both AC-coupled, meaning they work with any existing solar system regardless of inverter type. EG4 works best with hybrid inverters. We inspect your current setup, check your panel capacity, and recommend the battery that integrates cleanest. Typical retrofit install takes one day.

EG4 vs Tesla vs FranklinWH: how do I decide? +

Start with the tradeoff that matters most to you. If you want the cleanest mainstream experience, Tesla usually deserves the closer look. If you want the longest warranty and deeper energy management, FranklinWH usually deserves the closer look. If you want the most storage per dollar, EG4 usually deserves the closer look. We carry all three because no single battery fits every home. If you want the longer breakdown behind those tradeoffs, read Tesla Powerwall vs FranklinWH and EG4 vs Tesla Powerwall.

Where does the battery get installed? +

Most batteries mount on a garage wall near your electrical panel. Some can be installed outdoors. We choose the location based on your panel location, cable runs and local code requirements. All three systems are rated for indoor and outdoor installation.

What's the installed cost for a battery system? +

Single battery (essential backup): $10,000-$15,000 installed. Whole-home backup (2-3 batteries): $20,000-$40,000 depending on brand and capacity. EG4 is the most cost-effective per kWh. Tesla Powerwall 3 is mid-range. FranklinWH is the premium option with the longest warranty. Every quote includes installation, permitting, electrical work, and our 10-year workmanship guarantee.

What maintenance does a battery require? +

Almost none. Home batteries are sealed units with no moving parts. The system monitors itself and sends alerts through the app if anything needs attention. We can access diagnostics remotely. All three brands handle their own thermal management. Just keep the area around the battery clear and check on it occasionally.