Re: [RE-wrenches] On Demand Heaters for SDHW

Kris, Boiler manufacturers today get starry-eyed when their machines are able to provide a 10:1 turndown ratio. Even the venerable natural draft Bosch 125BS * provided a better than 4:1 turndown ratio and all the condensing powervent units compared below regularly offer 10:1 and some better

Re: [RE-wrenches] On Demand Heaters for SDHW

Kris, My apologies, my reference to your simplistic approach should have read your simple approach. Bill My compliments on your simplistic approach to coordinate the solar storage tank and tankless. Simplicity is the ultimate sophistication.

Re: [RE-wrenches] The Demise of WEEB

Brian - Thank you for your kind words! I will agree that the current practice for installing ground lugs - be it anything from the minimalist thread-forming screw method on up to the more cumbersome John Wiles method - leaves something to be desired. I would love to see the industry get together

Re: [RE-wrenches] GEC for Enphase inverters

Thanks Jay: That is true. Enphase and Evergreen are not compatible. Nick Soleil Project Manager Advanced Alternative Energy Solutions, LLC PO Box 657 Petaluma, CA 94953 Cell: 707-321-2937 Office: 707-789-9537 Fax:707-769-9037 From: jay peltz

Re: [RE-wrenches] GEC for Enphase inverters

I'd worry about putting such a high current in anyway- Enphase's max input is 10A (max Isc 12A) while the Evergreen Imp is 11.69 for their 215W. Original Message Subject: Re: [RE-wrenches] GEC for Enphase inverters From: Nick Soleil nicksoleilso...@yahoo.com To: RE-wrenches

Re: [RE-wrenches] GEC for Enphase inverters

Hi Dave, The Isc issue is true because the Evergreen is a 12v nominal module, so won't work with the current version of the enphase anyway. jay peltz power On Sep 16, 2010, at 8:05 AM, Dave Click wrote: I'd worry about putting such a high current in anyway- Enphase's max input is 10A (max

Re: [RE-wrenches] On Demand Heaters for SDHW

You’re right, Todd, there is often a space limitation. But overall, the tankless approach is more economical, eliminating the need to keep 80 odd gallons of water perpetually up to temperature. Remember the solar heated water is make up water and can contribute to the temperature of the

Re: [RE-wrenches] On Demand Heaters for SDHW

Hi all I have done several On Demand Heaters with SDHW, typically the SDHW provides 100% all summer (7-8 months) and then falls short in the winter.  I have never done a On Demand Heater that has made the customer happy.  They all have complained about 'chase the temperature' because there is a

[RE-wrenches] Surrette AGM's

Getting a few survival mode system requests...and of course they want no maintenance battery bank.I have to smile when I see them flop around on the floor when I show them the GNB Absolyte pricing..Surrette's ain't that much cheaper (about $2000 in this case) any one out there

Re: [RE-wrenches] Surrette AGM's

Holt, Contact Centex Batteries: Marc Kurth Centex Batteries, LLC 704 W Highway 71 - Suite B100 Bastrop, TX 78602 Ph 512 308-9002 Fax 877 254-2702 m...@centexbatteries.com http://centexbatteries.com for pricing and availability on Concorde

Re: [RE-wrenches] Surrette AGM's

I am an infrequent (3/year) designer/installer of grid-tied battery back up systems. I really like the SunXtender battery line. We can get them for a good price (contact me off line) here in Los Angeles. With that, I cannot vouch for cycling them 1,200 times to 80% DoD. That seems a bit severe. I

Re: [RE-wrenches] On Demand Heaters for SDHW

Title: Todd Cory The payback on a demand heater in energy savings is like 50+ years. A traditional tank heater, super insulated has very little loss. Todd Peter Parrish wrote: You’re right, Todd, there is often a space limitation. But overall, the tankless approach is more economical,

Re: [RE-wrenches] Surrette AGM's

Title: Todd Cory I know people disagree, but I NEVER use sealed batteries... I only use wet cell batteries. If people want no maintenance, they should not have a "survival mode" system. That level of unconsciousness is what usually creates the need for "survival mode". If it is grid tie with

[RE-wrenches] Security systems?

Hi Wrenches, Has anyone used a PV array security system they'd like to recommend - or one they'd recommend we'd not use? The only one we're aware of right now is called Gridlock - which we're just starting to look into. We install in some pretty desperate places such as South Africa and Haiti

Re: [RE-wrenches] On Demand Heaters for SDHW

HI Darryl, Having worked with ODH a lot, the usual cause of the problem you mention is the wrong type of fixtures or not understanding how to use them as there are differences. One of the issues you mention below on/off/on/off has to do with low flow rates being caused by a number of factors.

Re: [RE-wrenches] On Demand Heaters for SDHW3

I work exclusively with smaller off-grid systems in remote areas. So on-demand heaters are the only thing I deal withmany of these systems are not occupied for lengths of time (fishing and hunting tourist lodges, summer cabins, etc.). A tank heater doesn't make sense in these applications,

Re: [RE-wrenches] On Demand Heaters for SDHW3

In the desert Southwest we tend to use wells for water supply, and our water is often quite hard. While we don't do plumbing or DHW, we are often asked to advise on other aspects of home systems. We advise generally against tankless heaters because of our groundwater.