Charging issue

[Motörhead1972]

I recently stopped at the gas station the other day and when I went to start it back, the starter solenoid started buzzing. No power. Battery was dead. Before I left, it started like a champ. No slow or hesitant starts. I had my alternator/battery tested which turned out good and my battery was drained but holds a charge. I just replaced my starter and solenoid less than a week ago so I don't believe it would be that along with brand new battery and starter cables. Could it be the voltage regulator? I replaced the alternator roughly a month ago and was unsure if I hooked it up properly but I wouldn't think that I'd be running without an alternator for so long with daily driving. Any opinions or ideas?
Thanks

[Mancar1]

I went through the same thing. Even though I was told the battery was good it turned out to b the problem.
Volt reg are cheap why not replace it if it is a oldie?

[duaneo]

I happened to have watched this episode of autorestomod last night. It might be worth checking out.

https://www.youtube.com/watch?v=5Ru1ixsge50

Cheers,
Duane

[Kurt Combs]

First thing I would check, if you haven't already, is connections. Are they clean and tight. I would check the connections at the starter and also the ground cable from the battery to the engine. I had a starting problem with an old Lincoln about a month ago, cleaned the battery terminals and it went away. The funny thing was, the battery terminals looked fine until I removed them and they were slightly oxidized, but no corrosion buildup. It is the simple things that sometimes cause the biggest problems.