Tuesday, August 23, 2011

Taco Variable Seed Pump, PlugNPlay PV, PV and house value, More Refs

This is a catch-up on a few new content additions to the site:

Sean's Report on the Taco 009  VT Variable Speed, Integrated Controller Pump
Thanks to Sean for providing this report on using the new Taco pump that has a built in differential controller and uses variable speed to control flow rate.
The pump is intended for solar water heating systems -- it eliminates the need for a separate differential controller, simplifies wiring, and also offers the advantages of varying pump flow to match collection conditions.

Sean's Taco 009 VT
In a nutshell, the Taco 009 VT pump has been performing well -- All the details here...

Another Plug-N-Play Microinverter PV Setup
AC Unison has announced that they will be offering an easy to install PV system that incorporates a microinverter within each of the PV modules.

They do not provide a lot of detail on the installation, but the data sheet lists the nominal voltage as 240VAC 60 Hz -- so, I'm not sure how it integrates with the house power.  About installation, it says "The integrated AC design of AUO AC Unison modules means the system installers only need to deal with AC connections. This makes the system installation simpler and faster. It is estimated to reduce installation time and costs by ¼ or more."

About expansion, it says "Modules can be added to the existing system one-by-one in the future as budget for the homeowner increases."

They also describe a data logger/gateway device and an online monitoring service -- apparently similar to the Enphase systems.

I did not see any mention of price or availability.

More details from the AUO website...

Its still unclear to me to what extent the power utility and building code inspectors need to be involved in this kind of an installation.

The similar Clarian system...

PV and Home Values
This is an interesting study done by Berkeley Labs on how the sale price of your home might be effected if you install a PV system.    The increases reported are surprisingly large -- on the high end, they are greater on a dollars per watt basis than what my system cost to install.

I'm not at all sure I believe the numbers, but its nice to know that there might be some benefit when you sell your house to having a solar system.  It might also make it worthwhile to document how the system works and the resulting savings for potential buyers.

See the "Solar Homes Sell at Premium" link here for details...

Best Solar References and News
I cleaned up and added some new references to this page that lists some of the news sources and references that I find useful for keeping up on what's going on in the renewable energy world...

If you know of any other good ones, please let me know.


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