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3 Ring Power

How it works

One battery. Three ways it works for you.

Backup is just the start. Here's how a single battery protects your home, lowers your bill, and earns from the Texas grid.

Job 01: Backup power

When the grid goes down, you barely notice.

Texas knows outages: winter freezes, summer heat, and hurricane season on the Gulf Coast. When grid power drops, your battery disconnects from the grid and takes over your home's circuits automatically.

There is nothing to start, refuel, or run outside in the rain. The lights stay on, the fridge stays cold, and your Wi-Fi keeps working.

Keeps the lights on

When the grid goes down, your battery takes over automatically. No generator. No fuel. No noise.

  • Switches over automatically in an outage
  • Keeps essentials running: fridge, lights, Wi-Fi, AC
  • No fuel to store, no engine to maintain
  • Automatic switchover
  • Silent operation
  • Protected backup reserve you set

Job 02: Energy arbitrage

Buy power when it is cheap. Use it when it is not.

Wholesale electricity in Texas is usually cheapest in the middle of the day, when solar farms flood the grid, and most expensive in the evening, when the sun sets and everyone gets home.

Your battery charges during the low-price window, then powers your home through the evening peak, so you draw less from the grid when it costs the most.

Charges cheap, runs on savings

Your battery fills up when wholesale power is cheapest, usually midday, then runs your home through the expensive evening hours.

  • Charges when wholesale prices are low
  • Powers your home through the evening peak
  • Works on autopilot, no schedules to set
  • Charges on its own, no schedules to set
  • Works with or without solar
  • Savings depend on your electricity plan

Job 03: Grid services

Your home becomes a small power plant.

A few times a year, ERCOT demand surges and prices can jump to many times their normal level. The grid needs extra supply fast, and batteries can answer in seconds.

During those spikes, your battery can send stored energy back to the grid through programs offered with electricity providers. You get paid, and you help keep the lights on for your neighbors.

Gets paid when Texas needs it

When ERCOT prices spike, your battery can sell power back to the grid. Your home becomes a small power plant that pays you.

  • Responds to ERCOT price spikes
  • Earns while keeping your backup reserve
  • Helps keep the Texas grid stable
  • Only sells above your backup reserve
  • Helps stabilize the Texas grid
  • Program availability varies by provider and area

Putting it together

All three jobs, every single day.

The battery decides what to do hour by hour, always keeping your backup reserve in place.

The “duck curve”: grid demand across a day
Illustrative
Duck curve: net grid demand across a dayNet demand on the grid rises in the morning, sinks to its lowest point around midday when solar power floods the grid, then climbs steeply to a peak around 7 PM as the sun sets. The battery charges in the midday dip and powers the home or sells back during the evening peak.

Hover or tap the chart, or pick a stage below, to see what your battery is doing.

Join the waitlist

We're building in Houston for Texas homeowners. Leave your email and we'll reach out as soon as we're ready in your area. Already have solar panels? Then it's a grand slam: store the power your panels make and use it when it's worth the most.

Want numbers first? Send us your bill for a free savings estimate.