Hello, I drive a Opel Omega A Caravan built in 1992. When I drive with many consumers (light, blower, windscreen wiper, etc.) all control lamps go after a short time, the light gets darker and when the car is turned off it must be bridged again. I bought a new battery (the old one was definitely defective), it went well for two days and the same started from the front. Charging voltage of the alternator 13,1 V, the new battery was then defective and changed . Now the second new installed and after two days the same. alternator taken from the scrap and built in, charging voltage 13.6 V. It went a day well and again the same. Can now also the second battery, three days old also already be defective due to the low charging voltage? Does the charging voltage of 13.6 V not suffice? Can it also be another problem with the electrics? We did not measure the charging current of the alternator. Who can help??? Or has the gle I have had experience and know a solution?