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
From: re-wrenches-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
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
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
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
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
charge
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
] AC Coupled Magnum Issue
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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
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
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