And Expansion Packs make it more affordable than ever. Here’s everything you need to know.
The Old Way: Pick Your Circuits
If you looked into home battery backup even a few years ago, you remember the question: “Which loads do you want to keep on?”
Your installer would help you pick two or three circuits, the fridge, a few lights, maybe the AC if the battery could handle it, and wire them into a separate backup panel. Everything else in your home went dark when the grid went down.
In the Coachella Valley, where summer power outages hit hardest, that was a real problem. A home battery system that keeps two lights on while your home hits 110° inside isn’t really protecting you.
Tesla Powerwall: A Better Home Battery Solution
A Tesla Powerwall is a home battery storage system that stores energy from your solar panels or the grid and makes it available whenever you need it, day, night, or during a power outage. Think of it as a backup power system, but silent, maintenance-free, and smart enough to manage itself.
The Tesla Powerwall has come a long way since its 2015 debut. In 2025, Tesla installed its one millionth Powerwall, a milestone that speaks to how widely trusted this home energy storage system has become.
Tesla Powerwall 3: Your Whole Home Stays On
The Tesla Powerwall 3 took home battery backup to the next level.
With up to 11.5 kW of continuous output and enough surge power to start central AC, a single Powerwall 3 unit can back up most homes completely, no circuit-picking, no backup subpanel, no compromises. It also features a built-in solar inverter running at 97.5% efficiency, which means fewer components, faster installation, and a cleaner solar battery system overall.
When the grid goes down, you won’t even notice. Everything stays on.
The Powerwall 3 is also built for the elements. It maintains full operation in extreme heat, high humidity, and flooding up to two feet of water, critical durability for desert and storm-prone climates alike.
More Than Backup: Your Tesla Powerwall Works for You Every Day
The Tesla Powerwall 3 earns its keep even when the grid is running fine.
- Store What You Generate
When your solar panels produce more than your home needs, Powerwall captures the excess instead of sending it back to the grid for pennies. It can also recharge from the grid overnight when electricity rates are lowest, so you’re always drawing power at the cheapest possible time.
- Use It Whenever You Need It
That stored energy is yours to use on your schedule, during the day, overnight, or the moment the grid goes down. No rationing, no picking which appliances get power. Your AC, your fridge, your washer, everything runs like normal.
- Save on Bills. Potentially Earn Too.
Powerwall tracks your usage history, watches the weather, and monitors electricity pricing to automatically optimize when you store and when you spend. Over time, that adds up to real bill savings. And depending on your utility provider, you may also be able to earn credits by sharing stored energy back to the grid during peak demand periods.
Tesla Powerwall 3 Expansion Packs: More Storage, More Flexibility
Want your home battery system to run longer between charges? You don’t necessarily need another full Tesla Powerwall 3 system.
Tesla Powerwall 3 Expansion Packs connect directly to your existing Powerwall 3 and add additional storage capacity without duplicating hardware, creating a more cost-effective way to expand your backup power system.
Benefits of Expansion Packs:
- Increase storage capacity as your needs grow
- Add up to 3 Expansion Packs per Powerwall 3
- Expand backup duration for larger homes and higher energy usage
- Designed to integrate seamlessly with your existing system
For many homeowners, combining a Powerwall 3 with Expansion Packs provides a flexible way to increase storage capacity while keeping installation streamlined and cost-conscious.
Tesla Powerwall 3 vs. Expansion Pack: Which Do You Need?
It depends on two things: how long you want to run, and how much power your home needs.
Need more battery backup run time? → Add a Powerwall 3 Expansion Pack.
- Larger home with multiple HVAC zones or high energy demand? → Add a second Tesla Powerwall 3.
Not sure which home battery setup is right for you? That’s what we’re here for. Our team is ready to answer any questions you might have on your home’s power needs.
Revolutionize Your Home Energy with Tesla Powerwall
Get a Free Tesla Powerwall Estimate from Sunlogix
Sunlogix are certified Tesla Powerwall installers serving the Coachella Valley. We’ll assess your home’s energy needs, walk you through your solar battery storage options, and design a Tesla Powerwall system built for where you actually live.
