We have a 2019 Unity IB with a 2018 MB chassis. Less than 5,000 miles on it. And we have an electrical problem. We have been parked for about 3 weeks. We used the dash radio a few times and I think that we could have wore down the engine battery. Just before we noticed that there was a problem we had issues with our side entry dead-bolt (sticking) not retracting when using the key fobs. Suddenly, we had no seize noise when key inserted into ignition and the key will not turn in it, the key fobs won't work at all, and all dash lites are out. Upon the advice of LTV warranty service I charged the battery using a 1.5 amp trickle charger. The new charger only took about 5 hours to bring the battery up and then it indicated that it was in float mode. I left it on for another 20 hours and it was still in float mode. The key still wouldn't turn in the ignition. I'm confident that the charger did it's job but I haven't opened up the floor to check out the battery. ???