Re: [RE-wrenches] apollo charge controllers

2010-03-18 Thread toddcory
So do the charge controller and amp hour meter communicate so they agree on when the batteries are fully charged? Todd On Wednesday, March 17, 2010 12:02pm, R Ray Walters r...@solarray.com said: We have a couple out in the field. A bit of hassle to upgrade the firmware at first, but Apollo

Re: [RE-wrenches] Small Wh and large LRA

2010-03-18 Thread Warren Lauzon
The kicker is the large startup, so you may need to use batteries with low internal resistance, such as the Concorde AGM's. You will also have to make sure your cables are good for the max current to avoid any voltage drop which would cause a low voltage shutdown. Aside from that, just go with

Re: [RE-wrenches] apollo charge controllers

2010-03-18 Thread Mick Abraham
The function described by Todd was not present when I last evaluated the Apollo unit...and that would represent a major upgrade. Apollo's amp hour meter is much like the TriMetric...and I believe they have even licensed the original technology. The Apollo/Tri-Metric also cannot automatically

Re: [RE-wrenches] Small Wh and large LRA

2010-03-18 Thread Mick Abraham
Mark, you may wish to contact the engineers at Maxwell to see about adding some ultracapacitors to a small battery bank. The caps would charge up during idle times and be there to provide the kick when the item starts up. Here's a link: http://www.maxwell.com/ultracapacitors/ The capacitors

Re: [RE-wrenches] Small Wh and large LRA

2010-03-18 Thread Darryl Thayer
I agree with Warren, the batterys have a big job to do here,   If you have a 48 volt system the batteries will have to supply about 180 amps, this is a large surge and your need to be large or fast the AGM are good for surge, flooded would have to be larger (AH) to handle the same surge.   

Re: [RE-wrenches] apollo charge controllers

2010-03-18 Thread Peter Parrish
Esteemed wrenches, I have been wrestling with this concept about as long as we have been in business. How to estimate how much a pv system will reduce the demand charge for a customer. I know the worst case goes as follows: (1) Demand is based on measuring the consumption every 15

[RE-wrenches] ARRA act

2010-03-18 Thread Daniel Duffield
Topic - a Question - Anyone know if there is a trade group or solar representation group that has a website that lists: Solar PV and Solar Thermal products that comply with the ARRA act, (American Resource and Recovery Act, i.e., stimulus funds)- from my review, only those projects where project

Re: [RE-wrenches] Demand Charge Reduction by PV

2010-03-18 Thread Darryl Thayer
Hi Peter I have posted on same topic, not well written however.  I have a customer now that I am working with his load factor is 10% to 20%, I am hoping to do a demand reduction.  Also I have some data on past experiences dating back to 2003, I was trying to get Outback to help and they were