Tesla’s $3,500 Powerwall Battery Changing the Game for Solar Storage

Tesla Powerwall Home Solar Storage Battery

Tesla’s $3,500 Powerwall Battery Changing the Game for Solar Storage

Tesla unveils its new low-cost Powerwall battery solution for homes and businesses that runs entirely from solar energy. The batteries are revolutionizing home solar energy with the new powerwall that comes in a home battery or a commercial battery for business storage:

  • Tesla’s business / commercial solar battery will come in a 10kWh version that will sell for $3,500 and serves as a back-up application
  • Tesla’s home solar battery will come in a 7kWh version that will sell for $3,000 and serves as a daily cycle application

The latter unit will work when utilized with a solar PV system and the larger unit will help serve as a backup if power grids go down.

Tesla Powerwall Specs


The wall mounted rechargeable lithion ion battery utilizes a liquid thermal control. Both the 10 kWh and the 7 kWh versions come with a 10-year warranty. These are single phase and three phase utility grid compatible units and rated for indoor, as well as outdoor installation. The DC-AC inverter is not included.

Detailed specs include:

  • 92% round-trip DC efficiency
  • 350-450 volts
  • 2.0 kW continuous and 3.3 kW peak power
  • 5.8 amp nominal, 8.6 peak amp output
  • Operating temperatures: -4°F to 110°F /-20°C to 43°C
  • Unit weight is 220 lbs, 51.2″ x 33.9″ x 7.1″
  • Installation is required by a trained electrician

With a sleek, wall-mounted design, the batteries are lithium ion charged and can capture up to 10kWh from solar panels or wind panels. Even when sunlight isn’t bright, it can still draw on reserves, as well as at peak energy times in hot summer months and during power outages.

Not Just Batteries, but Systems: The Gigafactory Solar Game Changer

Elon Musk, CEO of Tesla Motors, unveiled two billion batteries that may be able to meet the world’s energy needs at a recent press conference. Elon Musk is an entrepreneur also known for creating Paypal, Space X and a new high-speed transportation system, Hyperloop. The solar batteries will be manufactured from Tesla’s electric car factory in California, but production will move to a “gigafactory” in Nevada by 2017 when it’s set to open. The goal is to create the $5 billion gigafactory, so the cost effective batteries will store electricity on a larger scale. To see the Bloomberg Business video describing Tesla’s plans for their Nevada plant, click here.

The small systems that people can utilize on roof tops will help to give solar energy to families and businesses that want to live off the grid. As Tesla will be the largest producer of lithium ion batteries, the mass production scale will help to lower costs further for these customers. The larger scale gigafactory will help businesses and utility companies with global energy efficiency. As these solar batteries help to even out energy usage – solar power by day, electricity by night, this will ensure a better flow of electricity and can cut the utility charges for businesses.

While there are other available battery storage solar systems, the Powerwall has a high storage capacity, a relatively low cost that may drop in price and will help utility companies smooth out areas where there are high grid demands especially in urban environments and during warm summer months. With orders being taken now online through Tesla Motors website, orders are expected to ship later this month. Elon Musk is also expected to unveil a 100 kWh battery pack in conjunction with his 2 billion batteries to help utilities, “That may seem like an insane number, but this is actually within the power of humanity to do.”