My new PV system

[KennethW]

If you are thinking DIY solar Builditsolar.com is a great site. the owner of the site does not sell anything.
Here is the system I built.
http://www.builditsolar.com/Projects/Sp ... olShed.htm

[MtnDon]

Yes,if the timeline in the present house does not compute it makes no sense. There is a Rheem system, 75 gallon tank, with roof top panels that sells at about $5500 last time I looked. And rubs on gas when the sun heated water runs out. Also an electric model IIRC.

Doing it with PV..... how have you calculated the heater elements and panels? I looked into using "wasted" PV power from our panels to heat water and found issues. Such as the resistance of the heater elements "misbehaves" when the elements receive a voltage lower than their design. A couple other things to, but that was almost 10 years ago now and I forget all the potential problems. And it was with a fairly small PV array which also reduced the potential effectiveness.

[lrrowe]

Yes,if the timeline in the present house does not compute it makes no sense. There is a Rheem system, 75 gallon tank, with roof top panels that sells at about $5500 last time I looked. And rubs on gas when the sun heated water runs out. Also an electric model IIRC.

Doing it with PV..... how have you calculated the heater elements and panels? I looked into using "wasted" PV power from our panels to heat water and found issues. Such as the resistance of the heater elements "misbehaves" when the elements receive a voltage lower than their design. A couple other things to, but that was almost 10 years ago now and I forget all the potential problems. And it was with a fairly small PV array which also reduced the potential effectiveness.

I am still a babe in the woods when it comes to this topic. I am reading what I can in order to take the next step. (I.e., I am self taught.

Here are a few links I am reviewing right now.

http://www.ebay.com/itm/Solar-Water-Hea ... xy7btRxwUx

http://techluck.com/faq.php

http://fire.nist.gov/bfrlpubs/build02/PDF/b02012.pdf

[tony.latham]

Here are a few links I am reviewing right now.

http://www.ebay.com/itm/Solar-Water-Hea ... xy7btRxwUx

http://techluck.com/faq.php

Bob:

That hybrid solar hot water controller has gotten my attention. I'm wondering if there is something cheaper than this guy's $240 controller?

I hope somebody smarter than I chimes in.

Tony

[lrrowe]

Here are a few links I am reviewing right now.

http://www.ebay.com/itm/Solar-Water-Hea ... xy7btRxwUx

http://techluck.com/faq.php

Bob:

That hybrid solar hot water controller has gotten my attention. I'm wondering if there is something cheaper than this guy's $240 controller?

I hope somebody smarter than I chimes in.

Tony

Has mine too!

[MtnDon]

FWIW, here are some links to a forum where the techluck PV water heating controller gets mentioned.

All are on NAWS, Northern AZ Wind & Sun

1.

2.

3.

4.

[MtnDon]

From one of the links.....this seems to have merit to look further into.....

I believe the SRCC OG-300 certification means it qualifies for the tax credit

[lrrowe]

Now my head is spinning. There are sure many nay sayers in these links. I am not saying they are wrong though. Guess I need to slow down on this (my) project until I understand it better. And if the OP (asianflava) wishes us to not take over his thread anymore, I can start a new one later.

Oh and thanks for your taking the time to find and post these helpful links MtnDon.

[MtnDon]

FWIW the guy who mentioned the PV Wand in one of those links (Dave) is a friend and has decades of experience in designing PV systems for off gridders both on land and sea.

[lrrowe]

FWIW the guy who mentioned the PV Wand in one of those links (Dave) is a friend and has decades of experience in designing PV systems for off gridders both on land and sea.

No negative vibes meant. Sorry if it sounded like that.

[MtnDon]

None taken.... never took it like that.

[tony.latham]

FWIW, here are some links to a forum where the techluck PV water heating controller gets mentioned.

All are on NAWS, Northern AZ Wind & Sun

1.

2.

3.

4.

Don:

Thanks! I was hoping you'd throw your hat into this.

Tony