[14TLC]

Thanks everyone. Variety of choices posted here. I did not mentioned that I need the power supply for BMW bikes programming. I don't believe that I will need high power like on the cars but can not find recommendation in ISTA/P documentation about power supply for bikes. Suppose 30A will be sufficient.
Eltek makes one for bikes, Bikecharger 750.
Both Deutronic and Eltek are recommended by BMW, but go figure since both of them are produced in Germany.

If you don't need some sophisticated battery charging methods, than any stable 13.8 V power supply which can deliver continuous power can do the job. Like the MAAS which is intended for radio transceiver products.