TESLA home batteries AND others

http://www.teslamotors.com/powerwall

Energy Storage for a Sustainable Home

Powerwall is a home battery that charges using electricity generated from solar panels, or when utility rates are low, and powers your home in the evening. It also fortifies your home against power outages by providing a backup electricity supply. Automated, compact and simple to install, Powerwall offers independence from the utility grid and the security of an emergency backup.

Solar Powered Day and Night

The average home uses more electricity in the morning and evening than during the day when solar energy is plentiful. Without a home battery, excess solar energy is often sold to the power company and purchased back in the evening. This mismatch adds demand on power plants and increases carbon emissions. Powerwall bridges this gap between renewable energy supply and demand by making your home’s solar energy available to you when you need it.

Current generation home batteries are bulky, expensive to install and expensive to maintain. In contrast, Powerwall’s lithium ion battery inherits Tesla’s proven automotive battery technology to power your home safely and economically. Completely automated, it installs easily and requires no maintenance.

Powerwall comes in 10 kWh weekly cycle and 7 kWh daily cycle models. Both are guaranteed for ten years and are sufficient to power most homes during peak evening hours. Multiple batteries may be installed together for homes with greater energy need, up to 90 kWh total for the 10 kWh battery and 63 kWh total for the 7 kWh battery.

How it Works ?

Home solar installations consist of a solar panel, an electrical inverter, and now a home battery to store surplus solar energy for later use.

Solar panel Installed in an array on your roof, solar panels convert sunlight into electricity.
Home battery Powerwall stores surplus electricity generated from solar panels during the day or from the utility grid when rates are low.

Inverter Converts direct current electricity from solar panels or a home battery into the alternating current used by your home’s lights, appliances and devices.

Contained within Powerwall's outdoor-rated enclosure is a rechargeable lithium-ion battery, a liquid thermal management system, a battery management system and a smart DC-DC converter for controlling power flow.

see more on the website source above for prices n so on

http://reneweconomy.com.au/2015/trina-solar-launches-residential-battery-ahead-of-grid-and-commercial-storage-31674

TRINA SOLAR (Chinese) do the same as TESLA , but seems quite more expensive: $1200/kWh for TRINA versus $429/kWh for TESLA .... anyway so now there is choice, and there will be more, because the techno behind TESLA HOME BATTERIES are sort of OPEN SOURCED by TESLA

Trina Solar launches residential battery, ahead of grid and commercial storage
By Sophie Vorrath on 15 May 2015
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Chinese solar giant Trina Solar has quietly unveiled its first energy storage offering, with the launch of a small range of lithium-ion batteries targeted at the residential market.

The batteries, pictured below, come in three different sizes – 3.6kW, 5kW and 9.6kW – and are set to be released on the Australian market – among other select countries – in June, at an expected cost of around $US1200 per kWh.

Doug Smith, country manager for Trina’s Pacific region, said the company’s “soft launch” of the battery at the sidelines of the Australian Solar and Energy Storage conference in Melbourne this week, was not in response to the sensational arrival of Tesla’s Powerwall, but added that this had given the market a huge boost.

“Tesla’s certainly doing the world a favour here, for sure,” Smith told RenewEconomy in an interview. “They’ve done a great job in such a short amount of time.”

According to Smith, Trina – which recently claimed the title as world number one producer of crystalline PV modules – made the strategic decision to get into energy storage more than 18 months ago, forming a new division called Trina BEST (Battery Energy Storage by Trina).

It has been working on the batteries for 12 months now, says Smith, at a purpose-built in Jiangsu, near Shanghai.

Smith said the company’s original energy storage focus – and testing ground – was on remote village applications in rural China, Asia and Africa.

And while the company’s first offering is a residential one – called “Trina House” – the plan is to release grid and micro-grid models (Trina Grid) in the coming year, as well as a commercial model (yet to be named) in the not-too-distant future.

In a presentation , Trina also mooted plans for EV batteries, but Smith says this is more of an “interesting end point” to the company’s battery story, rather than a concrete plan.

Smith told RE the initial price for the Trina Home batteries could be described as “premium value”, suited to a nascent market of early adopters, rather than wide-scale deployment.

“They’re not the most expensive, and they’re not the cheapest,” he said, adding: “I mean, Trina’s never the cheapest. That’s why we’re around.”

The li-ion battery components come, at this stage, from established battery maker ETL. According to Smith, the new-build ETL battery has the inverter built into it, so would be a kind of “plug-and-play” model. But he adds that Trina is still in final decision mode over the supplier for batteries and inverters.

“This is a start,” said smith. “It’s an aggressive play, but we’re not the only ones.”