Here I was on a beach way the heck and gone down Mexico way. My neighbor was having fits with his 4 8-D "high top" batteries.
His rig had one of those old NHE Onans, and his charger was a Magnatek 775-2 ferroresonant 75 amp charger. Not a "converter". He was ensconced in a remote parking spot, awning out, carpet laid, cobwebs gluing the wheels to the ground.
The old Magnateks used to put out 14.0 volts. It wasn't enough to zap those high tops (8-D high-tops were 1-1/2 8-D's tall).
Solution?
Turn off ALL the breakers. Connect the generator directly to the Magnatek. Tear off a matchbook cover. Shim the throttle on the NHE (volts per hertz). So what the generator was now running at 64 hertz? The Magnatek popped up to 14.8 volts and got the job done. The cost was prohibitive. Mexicans do not have matchbooks. I was out a matchbook cover.
Can't do that with this new-fangled crap. New stuff is so smart it out-stupid's itself.
