Re: [RE-wrenches] fewer wires, mo bettah?

2010-09-20 Thread Allan Sindelar
We have done this successfully with a SB6000 and four strings totaling 6.4 and 6.8 kW. Allan Sindelar Allan@positiveenergysolar.com NABCEP Certified Photovoltaic Installer E

Re: [RE-wrenches] fewer wires, mo bettah?

2010-09-20 Thread North Texas Renewable Energy Inc
The only potential problem I see might be from one unbalanced string, shading for instance. Otherwise the 4 <2%r strings feeding back thru a conductor with <1%r should be no problem. What could possibly go wrong Jim -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org

Re: [RE-wrenches] fewer wires, mo bettah?

2010-09-20 Thread Hans Frederickson
Marco, In this case, slightly differing resistance between your grounded and ungrounded conductors will not make any difference. You will just need to do your DC voltage drop calculations for each half separately, instead of the typical voltage drop calculation that uses wire length x 2. Different

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

2010-09-20 Thread Jeff Oldham
One of my favorite marriages is a solar ready (preheat) tankless and a ProgressivTube SHW collector. With this combo you get batch type collector that is storing the heated water, a 10 yr. P&L warranty, and no pumps, sensors or controls on the SDHW side. I double insulate the supply and return l

[RE-wrenches] fewer wires, mo bettah?

2010-09-20 Thread Marco Mangelsdorf
Check this out. Four series strings of mods on a same plane roof feeding a larger Sunny Boy or Fronius inverter. Four #10 conductors for the ungrounded, fused (at the inverter) conductors. And for the grounded conductor, a single, common, larger conductor from those four strings. So ins

Re: [RE-wrenches] Surrette AGM's

2010-09-20 Thread Brian Teitelbaum
Opps! Sorry guys. That was supposed to just go to Holt Brian Teitelbaum AEE Solar From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Brian Teitelbaum Sent: Monday, September 20, 2010 10:59 AM To: RE-wrenches Subject: Re: [RE-wrenches]

Re: [RE-wrenches] Surrette AGM's

2010-09-20 Thread Brian Teitelbaum
Hi Holt, The S-460-AGM is too new for any meaningful feedback to be generated. I guess we will know in 5 years or so. This is always a problem with new battery designs. It is interesting though that Rolls/Surrette does not list that battery in their "Renewable Energy Products" line. Next time

Re: [RE-wrenches] Delta LAs

2010-09-20 Thread August Goers
Joel - I'm interested in seeing the archived discussion but I don't have your email address to email you off list. Thanks, August August Goers Luminalt Energy Corporation 1320 Potrero Avenue San Francisco, CA 94110 m: 415.559.1525 o: 415.641.4000 aug...@luminalt.com *From:* re-w