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Saft introduces 10 kWh/ 10 kW stationary Li-ion storage system for high-end residential and small commercial installations

Saft has introduced the Intensium Home 10M lithium-ion energy storage system, designed for high-end residential and small commercial solar PV installations. The 10M unit expands Saft’s Intensium stationary storage lineup, ranging from the residential Intensium Home 4M (4 kWh / 7 kW) unit to Intensium Smart (50 kWh / 100 kW) for tertiary and agricultural buildings.

Containerized Intensium Max systems provide megawatt solutions for diesel hybrid and large PV plants.

In a new partnership with KACO new energy GmbH, one of Germany’s leading inverter brands, Saft is offering the Intensium Home 10M alongside KACO’s new three-phase inverter. The Saft and KACO package creates a solution for the growing number of home and commercial “prosumers” (producers and consumers).

The new Intensium Home 10M 240 V system comprises five Li-ion modules to provide both high power capability, rated at 10 kW, with 10 kWh energy storage in a cabinet. This high power Li-ion system works in partnership with KACO new energy’s blueplanet gridsave 14.0 TL3 inverter in installations up to 30 kW. Prosumers will be able to follow their system’s performance on their smartphone.

The combination of Saft’s Li-ion energy storage and KACO new energy’s inverter offers advanced energy management with the capability to operate as part of swarm-type schemes. These swarms offer the possibility of aggregating several decentralized energy storage installations to improve grid stability by helping balance supply and demand, as well as offering financially attractive ancillary services to grid operators such as frequency control.

The smart energy management system enables remote control of the storage device via Internet or other communication interfaces, for example to switch from self-consumption to frequency regulation.

Swarm applications together with self-consumption, are set to play a key role in Germany’s energy transition—the “Energiewende”. Self-consumption, rather than feeding excess solar energy into the grid, is particularly attractive to the growing number of prosumers who are keen to take an active role in managing their energy production and usage.

In Germany in 2020, 29% of residential electricity demand and 18% of commercial electricity demand could be met by self-produced photovoltaic power, according to GTAI (Germany Trade & Invest).



a: No price
b: Much better power than Tesla (10Kw vs 2Kw)
c: No figures on the daily load - is it 10kwH / day or / week ?

They will enable people to rarely use the grid in summer, but won't have much use in winter (in Germany) - very cold, very snowy, short days in a German Winter.

Great to see the beginning of a home storage industry with standard energy and power points (7, 10 KwH, etc).

I would expect the Germans to get this to work properly.


It seems that Tesla/Panasonic, Sony, Toshiba and others will have competition in he home and industrial storage units.

This could be a major (multi $$$B) business by 2020 or so, specially in sunny and windy places equipped with Solar PVs and/or Wind turbines.


That power output sounds more like a lithium titante chemistry than anything else.
It will be interesting to see fuller details, costs etc.


What is a good power? If 95% of your energy consumption is covered by 2kW and you are connected to the grid then does paying for 10kW make sense? You can gain a lot of press by shouting about energy storage but the specs and even the press release talk about frequency regulation. Or maybe peak shaving, but are they big enough to do that for anyone who cares?

The Tesla pack made more sense to me: the business one seemed to fit a customer with solar cells that didn't operate on the weekend. But the economics still didn't add up.



Cycle life and power output are essentially trade offs in batteries.

Having a high rating for power means that if you are not using all of it, you will still often get longer life.

Other considerations such as calender life come in, but don't turn your nose up at batteries that have a high power rating.


This would be perfect for tiding a household over the 30-minute rolling blackouts that are inevitable with a forced shutdown of baseload generators in favor of "renewables".

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Tesla limits the powerwall to 2kW per unit in order to save cost not because it is the limit of the cells they use. With only 2kW instead of 10kW you can use much thinner cobber wires that make the powerwall cost less. Cobber is expensive. Tesla also use the powerwalls as virtual solar panels that deliver electricity when the sun does not shine. Typically you would use one powerwall (rated at 2kW continuous and 3.3kw peak) for every 3kw of solar panel capacity that are installed so that if you are not using much electricity the solar panels charges the power walls using DC (direct current) thereby avoiding efficiency losses in the inverter that connect the solar battery system to the grid. See schematics of Tesla's solar panel, powerpack and inverter to grid.

As DavidJ says the grid is used for large loads (like charging your Model S at 20kw) not the batteries that are used to store unused solar power for later use.

Solar power installations will explode in the comming years because they get much cheaper and more people will want to be part of making a sustainable economy. So if the US households, businesses and utilities installs say 600 GW of solar panels i the next 20 years you need to support that with some 400 GW of battery power with about 1400Gwh of storage or the grid will not function. It will not be long before the law will require each 3kW of solar power capacity to be matched with 2kw of batteries with 7kwh storage.

I am certain that Saft's system is far more costly (my bet 6000 USD for the 10kwh) because Saft does not produce at the scale that Tesla does and because they can do 10kW per 10kwh pack. For that reason it will not sell well.


Thicker cobber wires or not Tesla have now upgraded their output:

'Tesla Motors held its 2015 Annual Shareholders Meeting today at the Computer History Museum in Mountain View. During his presentation, Elon Musk, Tesla’s CEO, announced that Tesla will be doubling the power output of the Powerwall, Tesla’s residential energy storage system, to 7KW at peak usage and 5KW for steady usage.

Musk confirmed that the price will remain the same, $3,000 for the 7KWh daily cycle version and $3,500 for the 10KWh weekly cycle version.

Tesla offers 2 different versions of the Powerwall battery system. The 7KWh pack is built to be discharged daily in order to take advantage of a solar power installation or to manage usage, especially if you are paying your electric utility by time-of-use. It could also be combined with multiple packs in order to take a solar installation completely off-grid. The 10KWh pack is meant to be use as a backup power system. Ideally, it should only be use in case of power outages, but the battery pack is built to withstand weekly cycles for over 10 years.

Musk admitted that even though the demand for the Powerwall has been overwhelming with over 38,000 reservations in just one week, the overall reaction was mixed. The biggest complaint was the steady output of only 2KW which isn’t really enough for an average household. They listened to the complaints and adjusted the offering to a now impressive 5KW.'

It will be interesting to find out what this does to anticipated cycle life, as power output and life tend to trade off.


It appears that the 5Kw is for the 7kwh Powerwall, not the 10Kwh Powerpack:

That does not surprise me, as it seems that the Powerpack uses the NCA cells as in the cars, and can only manage weekly recycling anyway even at 2kw, so would presumably pass away in fairly short order if asked to supply 5kw.

For the NCM chemistry used in the Powerwall, 5kw from 7kwh is pushing it a bit, so info on cycle life and capacity reduction remains of interest.

We still don't even have DOD information on the unit.

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Thank you for that info Davemart. I had not seen it yet. Have not changed Tesla's website to reflect that info. I just vent to see that shareholders meeting at

Musk said a few other interesting things. He said the 7kwh pack is rated for 5000 cycles which is about 15 years on a nearly daily basis. The 10kwh pack is rated for 1200 cycles and is intended for backup predominantly. The 7kwh is intended as a virtual solar panel. Musk also say that for solar panel owners that has an inverter it will only cost about 500 USD in installation cost to add one powerwall. Musk also say that economics is best for the powerpacks for utilities as it enable utilities to support the grid with far less capacity for transformer stations and power plants. He said that 50% of the infrastructure cost for power plants and transformers stations can be sawed when you have batteries at every substation in the grid.

I do not know how Tesla could upgrade the 7kwh powerwall from 2k to 5k without adding cost. I guess that some time has gone since the announcement and that more test results regarding the system shows that the current cabling of the system can safely handle 5kw instead of 2kw. So they simply change the software managing the pack to allow for 5kw instead of 2kw. Until Tesla's website changes the info on the powerwalls I do not think the 5kw is a final product specification.


The easiest way to up the power might have been to reduce the DOD, which would give the battery an easier time.

That might not lead to an unacceptable DOD, as some batteries on offer for stationary storage have as high as 90% DOD, and 80% or so would not be bad IMO.

Most of the discussion about this pack has treated it as though it has a 100% DOD, which is only really possible if there is undeclared buffer in there, which seems unlikely as that is not the way that batteries are normally specified.

So again, until we have full specs it is impossible to evaluate it against other offerings.


Let's not forget that early ICEVs had under 15 hp and our recent bombs have over 850hp. (about 56X times more)

The same goes for early home electrical systems, they were under 10 KW @ 100 Volt but our recent all electric home are equipped with 400+ amps/220VAC (about 88+ KW)electrical system.

Home storage systems will grow from 3 to 5 KW to 25+ KW within a few years and will cost relatively less.

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