Originally Posted by camaraderie
Ken... based on what you've posted...I wouldn't rule out a battery issue causing the inverter issue. If you drove several hours...the batts should be reading above 13V when you stop...falling to 12.6-7 IF disconnected at the negative line for 12-24 hours.
You might wanna check that before incurring an expensive repair.
Bulk charging on a Magnum ought to be somewhere north of 14.2 V...I'd put a voltmeter on the BATTERY terminals while it is indicating bulk charging and see what voltage you see at the terminals.
If you're not seeing 14+ Volts in bulk mode....and your static voltage readings (or turkey baster readings -hydrometer) aren't indicating a battery state issue...then it's time to have the Magnum in for surgery.
Are the batts wet cell? 6V or 12V?
Thanks for your input. The alternator did charge the batteries to about 13v as we drove. After a few days they were about 12.4. The problem is the inverter will not switch to bulk charge. The screen says bulk but the inverter throws a error and stops it. After a few hours on the phone with tech support and doing multiple tests and resets the determination is the control board is bad. The cost to repair that is just about the same as a new one. So a new one is what I will need.
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