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Actually, Tesla is. Australia got one of the first Powerwall installs recently, and the electricity pricing there makes battery storage compelling.
No. WattGrid is a snake oil salesmen selling lead acid batteries that will only last a few years.
the website looks like it was amatuer hour at the website school. Tables don't align properly. They confuse kW and kWh. It looks decidedly scammy.
It's a lead acid system. That's how they they work. This system is nothing new. Just the same old batteries people have been using for years. They are just smart enough to constantly refer to Tesla and how they are "cheaper" in their press releases. The key figure they never release is the number of cycles that battery is rated for.
Lead acids and gels can be very dangerous at home. Require maintenance to ensure they don't explode and leak deadly gasses.
Lead acids and gels can be very dangerous at home. Require maintenance to ensure they don't explode and leak deadly gasses.
Here's some nice data
Life of VRLA batteries seem to be between 5-8 years. But after you look at discharges of only 40% that drops to 5.5 years MAX and at 80% discharge that only 4.1 years MAX. I certainly wouldn't be worried about these guys as major competitors of Tesla.
My source: http://www.power-thru.com/documents/The%20Truth%20About%20Batteries%20-%20POWERTHRU%20White%20Paper.pdf
Life of VRLA batteries seem to be between 5-8 years. But after you look at discharges of only 40% that drops to 5.5 years MAX and at 80% discharge that only 4.1 years MAX. I certainly wouldn't be worried about these guys as major competitors of Tesla.
My source: http://www.power-thru.com/documents/The%20Truth%20About%20Batteries%20-%20POWERTHRU%20White%20Paper.pdf
