Comments on: Japanese Cleantech Partners to Launch Integrated Home Solar PV-Energy Storage & Management System http://cleantechnica.com/2012/02/02/japanese-cleantech-partners-to-launch-integrated-home-solar-pv-energy-storage-management-system/ Clean Tech News & Views: Solar Energy News. Wind Energy News. EV News. & More. Tue, 30 Dec 2014 01:04:00 +0000 hourly 1 http://wordpress.org/?v=4.0.1 By: Tonyglassemail http://cleantechnica.com/2012/02/02/japanese-cleantech-partners-to-launch-integrated-home-solar-pv-energy-storage-management-system/#comment-117396 Wed, 04 Apr 2012 17:48:00 +0000 http://cleantechnica.com/?p=34540#comment-117396 Hi and thanks
Do you have contact numbers for the parties mentioned in this article.
We are keen to set up this type of system

]]> By: Anonymous http://cleantechnica.com/2012/02/02/japanese-cleantech-partners-to-launch-integrated-home-solar-pv-energy-storage-management-system/#comment-112580 Fri, 03 Feb 2012 10:59:00 +0000 http://cleantechnica.com/?p=34540#comment-112580 Well, it is a cute system. But here is the problem. A resident in Japan can usually sell electric power for 48 yen, buy it on peak daytime hours for 28 yen, and buy it late at night for about 9 yen. You would only really want to charge the battery during the daytime, right? But to do that, you are giving up sales of 48 yen per kWh. And you don’t want to run appliances from the battery at night, because electricity is only 8 yen per kWh. What is comes down to is that if you want to use it efficiently, you charge it from sun up to 8 am. Then sell as much power as you can during the day. Then use the battery from sundown to 10 pm. Then use off peak power.

I am betting that is one expensive battery considering that it will store only about 2 kWh per day. It might save a homeowner about 60–100 yen on a perfect day. Call it 10000 yen per year?

Of course the value is off grid use, but barring catastrophes, that is not a huge market.

]]> By: Anonymous http://cleantechnica.com/2012/02/02/japanese-cleantech-partners-to-launch-integrated-home-solar-pv-energy-storage-management-system/#comment-112571 Fri, 03 Feb 2012 07:54:00 +0000 http://cleantechnica.com/?p=34540#comment-112571 Just wondering if they are using concrete “tilt up” technology for high speed, low cost mass produced homes? It would seem to drop the overall cost (even with the solar) by tens of thousands of dollars.

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