AGM solar charger on starting battery

I have 1 battery on my 3rd gen its an AGM. I'm interested in adding a small solar panel.

How do I hook up a charger on the same circuit as my alternator? Are there any solar chargers that are smart enough to be on the same circuit?

 

typically a solar charge controller goes between the panel and the battery. alternator doesn't care

 

Agreed, most any solar controller should be fine. If the alternator carries the voltage higher than what the solar controller is set for, the solar controller simply suspends charging until the voltage drops back down again, and vice-versa.
I have a Morningstar SunSaver unit.

 

My controller has a 12v switched input. Once the ignition is on, the solar is de-activated. Solar is fed directly to battery. No need to mess with your alternator.

 

What controller? Or are you just using a relay or something?

 

I'm running a dual battery system with a KickAss Portable Power Station, which uses a controller almost identical to this Redarc controller:
https://www.redarcelectronics.com/u...n-vehicle-dc-battery-charger-ignition-control.

I would think this could work well even for a single battery setup.