Re: [RE-wrenches] AC Coupled Magnum Issue

2013-03-08 Thread Ryan
-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake Sent: Friday, March 08, 2013 9:40 AM To: RE-wrenches Subject: Re: [RE-wrenches] AC Coupled Magnum Issue Thank you to all who responded to this post. Larry, that sounds like a great potential

Re: [RE-wrenches] AC Coupled Magnum Issue

2013-03-08 Thread Drake
Thank you to all who responded to this post. Larry, that sounds like a great potential solution. That will put the frequency shift in line with where the battery cutoff voltage needs to be. The frequency shift happens 2 volts above the absorption charge set point. My only issue with the soluti

Re: [RE-wrenches] AC Coupled Magnum Issue

2013-03-07 Thread Brian Faley
Solar Power Systems Sent: Thursday, March 07, 2013 3:36 PM To: RE-wrenches Subject: Re: [RE-wrenches] AC Coupled Magnum Issue ANDyou are still working on that stand-alone, programable, temperature compensated battery chargerright??? Thank you, Larry Crutcher Starlight Solar Power

Re: [RE-wrenches] AC Coupled Magnum Issue

2013-03-07 Thread Larry Crutcher, Starlight Solar Power Systems
ANDyou are still working on that stand-alone, programable, temperature compensated battery chargerright??? Thank you, Larry Crutcher Starlight Solar Power Systems On Mar 7, 2013, at 4:07 PM, Brian Faley wrote: Hi Allan, In answer to your question: Yes, we’re developing an AC side 4k

Re: [RE-wrenches] AC Coupled Magnum Issue

2013-03-07 Thread Brian Faley
nches] AC Coupled Magnum Issue McAfee SiteAdvisor Warning This e-mail message contains potentially unsafe links to these sites: <http://www.siteadvisor.com/sites/athens-electric.com/?pip=false&premium =true&client_uid=446795512&client_ver=3.6.0.187&client_type=IEPlu

Re: [RE-wrenches] AC Coupled Magnum Issue

2013-03-07 Thread Allan Sindelar
OK, a bit more: The line diagram I was referencing was dated 5/1/2010. A later diagram from a Powerpoint given at last year's NABCEP CE conference shows a "MagNet" AC diversion controller. It allows AC diversion loads and three-stage charging. No mention of temp c

Re: [RE-wrenches] AC Coupled Magnum Issue

2013-03-07 Thread Larry Crutcher, Starlight Solar Power Systems
Meant to say, "You should tweak #3 & #4 above..." Drake, Charging an AGM battery does not have to occur at the maximum charge voltage allowable; you can charge at a lower voltage for longer periods of time and still achieve 100% SoC. Since you have grid power to work with, slow down the charg

Re: [RE-wrenches] AC Coupled Magnum Issue

2013-03-07 Thread Allan Sindelar
Drake, Magnum's approach does not use disconnecting the AC output from the GT inverter as a fail-safe method of preventing battery overcharge. Rather, the Magnum documents I have use a DC diversion controller and diversion load for this purpose. Their method

Re: [RE-wrenches] AC Coupled Magnum Issue

2013-03-07 Thread Larry Crutcher, Starlight Solar Power Systems
Drake, Charging an AGM battery does not have to occur at the maximum charge voltage allowable; you can charge at a lower voltage for longer periods of time and still achieve 100% SoC. Since you have grid power to work with, slow down the charge cycle. Assuming you have a late model ME-RC and v

[RE-wrenches] AC Coupled Magnum Issue

2013-03-07 Thread Drake
Hello Wrenches, I had an unexpected glitch in AC coupling a Magnum 4024 PAE inverter. The system utilizes AGM batteries, which (according to Concorde tech support) have a very strict upper voltage limit. The relay used to stop the current input from the direct grid tie inverter, when batter