DC Motors These motors do not require mains power and operate via rechargeable batteries or solar panel in the case of external motors. TUBULAR MOTORS (11) WSERD24 WSERD30-A WSERD30B 1/30 WSERD30B 2/31 – internal roller blinds WSERD30B 2/31 C matter – internal roller blinds WSERD30B 3/20 internal roller blinds WSERD30T WSERD40B 10/14 WSERD40B 5/28 WSERD50-B 20/12 WSMD50 50/9