Often the long wires from the alternator to the battery are inadequate to charge a battery due to the voltage drop.
It's very common for batteries to become discharged at a dealer and that can be a battery killer.
Have the battery load tested at any auto store for free.
Also a 25 percent charge suggests idiot lights, is that correct? They are only good for the salesman to sell you the rig. Start researching your charger, wiring and battery. Low quality chargers often don't adequately/correctly charge batteries.
Above all else buy a voltmeter with which you'll know a lot more about your battery charge and condition. $20 tops and the free HF ones are acceptable. A good hydrometer is the best device for checking a battery and more involved than a voltmeter.