U2415, USB-A charging MacBook

Hi - I have a ten year old (2015) monitor U2415b. I bought a new USB to USBc connector (to my MacBook). In my office I have a brand new Dell monitor and the USB cable also charges the laptop. At home with the old monitor, it does not charge. I wanted to know if this is possible or if the charging capability is something that only came in later.

With only 2 USB ports I am not able to have everything in that I need (monitor cable, charger, and connector for keyboard/mouse). I have tried using the adaptor but the monitor does not work using that, nor can it be used to charge.

If the old monitors can't charge the laptops, is there a USB splitter that would work? I am conscious that my current adaptor doesn't do it. 

Thanks,

Richard