The Tesla Powerwall is a home battery used to store the extra electricity generated by your Tesla Solar Roof or solar panels. Many solar customers choose to add a Powerwall system when installing a Tesla Solar Roof. It enables them to use their own energy at night and allows for off-grid living.  

One great thing about the Tesla Powerwall is its scalability. Depending on your needs, we can install as many Powerwalls as you need. Here are the key factors we consider when deciding how many Powerwalls to recommend.

1. The Size of Your Solar Roof

When a customer asks, “how many Powerwalls do I need?” the first thing we consider is the size of their Tesla Solar Roof. The larger the roof, the more energy it generates — and the more energy is available to store. Small roofs may only generate enough energy to power one Powerwall in a day, but most generate enough electricity to power two or three.

2. Location

The more sun your roof receives, the more energy it will generate. In Florida, we get so much sun that Tesla Solar Roofs usually create enough energy to quickly fill multiple Powerwalls without issue. Customers in less-sunny regions may opt for fewer Powerwalls simply because their energy production is lower.

3. Power Needs

In addition to considering how much energy your Tesla Solar Roof can produce, we also consider how much energy you consume. The average home with less fewer electricity needs than a larger building won’t need as many Powerwalls. Here are a few of the things to consider when designing your Powerwall system:

  • Central AC unit
  • Electric range
  • Electric water heater
  • Internet
  • Lights
  • Microwave
  • Pool pump
  • Refridgerator
  • Stand alone freezer
  • Tesla EV charging station
  • TVs

4. Partial Versus Full-Home Backup

When the public power goes out, customers with a Tesla Powerwall will still have power. However, we do consider how much power you need for backup during an outage. If you only care about powering your lights, outlets, and a few small appliances, one Powerwall is sufficient for short outages. If you want to fully power your home, including HVAC, we recommend two or three Powerwalls.Customers sometimes ask us, “how much will the Powerwall cost?” The answer really depends on how many Powerwalls you need. At Kelly Roofing, we talk with each customer about their own energy needs and priorities to make this determination. If you’re thinking of installing a Tesla Solar Roof and Powerwall, please contact us. We’re proud to be a Tesla Certified Installer in Southwest Florida.