Re: [RE-wrenches] Designing PV systems for lightning prone areas

Hi Jeff; I'd look at using a lightning arrestor that is listed as a lightning protection device (UL 1449 rev. 3) The Deltas (which I've used for years) are just wires stuck in some sand. I have never had them actually work, but as you found, good grounding can do wonders. Take a look at the n

Re: [RE-wrenches] Designing PV systems for lightning prone areas

Yep, lots of copper in the ground is key as is a suppression specialist. I have a 23kW array on the top of a structure on the top of a 400' remote island at 8 degrees from the Equator. This site averages 125 strikes/year. We built a 4/0 CU ground grid completely around and under the building and

Re: [RE-wrenches] High Temp Batteries

Here's a pic, since several people asked to see: <> On Sep 22, 2011, at 12:47 PM, Ray Walters wrote: > I'd second the ground vault. We used either the plastic cargo boxes (for up > to 4 batteries) or the Greenlee job boxes for up to 12 batteries. We add foam > board to the outside, which keeps

Re: [RE-wrenches] High Temp Batteries

I'd second the ground vault. We used either the plastic cargo boxes (for up to 4 batteries) or the Greenlee job boxes for up to 12 batteries. We add foam board to the outside, which keeps the metal from being in direct contact with the soil. Like Todd noted, it can really moderate the temp swin

Re: [RE-wrenches] Invitation to connect on LinkedIn

If you have any questions about this, contact me OFF list. I have no doubt this was an oversight, but... Please, folks, if you are going to join ANY organization that asks for your address book, be sure to remove any list servers, etc. before giving it up. Also, on a related note, there are man

[RE-wrenches] Advanced Solar Photonics (ASP) modules?

Does anyone have experience with and/or comments on modules from Advanced Solar Photonics (ASP) out of Florida? Quality? Reliability? Performance? Thanks! -- Darren Anderson | Project Manager *Solar Electric Light Fund* | *www.self.org* dar...@self.org __

Re: [RE-wrenches] High Temp Batteries

you might look at Zomeworks that sells some battery conditioning equipment, very good from what I hear. jay peltz power On Sep 22, 2011, at 10:47 AM, toddc...@finestplanet.com wrote: > Have you considered a burried, underground vault? We did this with broadcast > equipment when I did that work

Re: [RE-wrenches] High Temp Batteries

Have you considered a burried, underground vault? We did this with broadcast equipment when I did that work years ago and it worked great at moderating high/low temp swings. Todd On Thursday, September 22, 2011 8:35am, "Chris Daum" said: Dear Wrenches: I have people trying to powe

Re: [RE-wrenches] High Temp Batteries

Chris, One of our customers had this problem in outdoor lighting in Las Vegas. He switched to Lithium-Ion batteries from K2 in Henderson NV and says they have been working well for 3 years in desert heat. They make small 12 volt packs with built-in charge control and discharge protection. They

[RE-wrenches] High Temp Batteries

Dear Wrenches: I have people trying to power medical equipment in an extremely hot environment--they need batteries that can withstand temps of 75 degrees Celcius. The Yuasa batteries they've been using are only rated to 50C and don't last long (and thus, are cost-prohibitive to use and replace

[RE-wrenches] Invitation to connect on LinkedIn

LinkedIn August Goers requested to add you as a connection on LinkedIn: -- Doug, I'd like to add you to my professional network on LinkedIn. - August Accept invitation from August Goers http://www.linkedin.com/e/-xy4d8h-gsvto1jz-3/