No other electrical issues that you have noted? Could be a faulty PCM, if Smart Charging is a (fuel-saving) feature on the SHO (and I assume it would be). Is there an aftermarket alternator available that can substitute, to check to see if the alternators in your SHO are from the same batch/have a fault?
From an Edge info page:
http://www.myfordedge.com/specs/2011-ford-edge-powertrain.php
Battery management: Smart Charging
What it is: A system that allows the battery to be charged or discharged at optimal opportunities instead of allowing the alternator to continuously charge the battery independent of customer use, which wastes energy. Smart Charging increases the alternator output when the vehicle brakes or decelerates, converting the vehicle’s kinetic (motion) energy into electric energy without having to use additional fuel.
How it helps: The “free” electric current is used to recharge the battery so that it can be used by the electrical systems later. This could be when the engine is switched off during a stop or when the alternator is operating in a less efficient mode. The battery’s advanced management system continually monitors its status and communicates with Ford’s aggressive deceleration fuel shutoff system so the regenerative charging feature can charge the battery in the optimal way. The decel system knows how much battery charge is available so that it can leave the engine running if the battery does not have a sufficient level of charge.
Longer battery life, reliable starts: Smart Charging improves the life of the battery because it keeps the battery at a more consistent level of charge, which in turn aids in reliable starting. The one-touch starting in the 2011 Ford Edge enables starts of around seven-tenths of a second with precise fuel delivery for maximum fuel economy and minimal emissions.
Another
post in the Edge forum pointed out this article (
http://www.diagnosticnews.com/parasitic-battery-drains/) and says the Battery Management System might need to be reset, I guess to "learn" the new battery.
"NOTE: When the battery (or PCM) is disconnected and connected, some abnormal drive symptoms may occur while the vehicle relearns its adaptive strategy. The charging system set point may also vary. The vehicle may need to be driven to relearn its strategy.
[list type=decimal][*]Disconnect the battery. For additional information, refer to Battery Disconnect in this section.
[*]Remove the bolt and the battery hold-down bracket.
[*]
- To install, tighten to 7 Nm (62 lb-in).
[*]Remove the battery.[/list]
To install, reverse the removal procedure.
- Carry out the Battery Monitoring System (BMS) Reset using the scan tool after the battery is connected. If the BMS Reset is not carried out, it takes approximately 8 hours for the Body Control Module (BCM) to learn the new battery state of charge. During this 8 hour period, the vehicle must be undisturbed, with no doors opened or keyless entry button presses. If the vehicle is used before the BCM is allowed to learn the new battery state of charge, engine off load shedding can still occur and a message may be displayed."
From the
F150 forum:
Performing a BMS reset will reset the battery SOC to a default of 85%- regardless of its true state of charge and reset the SOC drain timers. This should get you out of load shed. The following is the procedure using the Diagnostic Engineering tool.
BMS reset procedure with Ford "Diagnostic Engineering Tool":
Go to Gen Diagnostics and select Module ID to 726 (BCM)
Select Service 0X10 and extendedDiagnosticSession, and press "Send Message" button
Select Service 0X31
Check "User Defined" box, and type in "201A"
Press "Send Message" button
Ford Quick Tips: #3 Checking Alternator Voltage On 2011+ Fords
About 6:10, talks more about the BMS.
