Therefore, we buy a voltage regulator from a foreign car, the cheapest, for example, Mobiletron VR-B195 (193) M. Voltage 14.7 volts. By mounting it does not fit, wider through the holes. We take our regulator, solder the transistor (tablet), just solder it from the imported one, and solder it into our regulator, everything fits, the transistor leads are the same.
At idle speed of 14.6 V, when a large load is turned on, light, stove, radio, rear window heating, etc. the voltage drops to 13.7-14.2 volts, which is enough to charge the battery. No photo, the generator on the car. After the alteration, the problem with the battery charge disappeared. I wish everyone a try. You will be satisfied.