I have Victron. The MPPT's are great and allow you to customise settings and can upload data to the cloud (with a GX device) for review at a later date if you are that way inclined. The B2B is the Victron Orion TR Smart, it is very basic but once again fully customisable via Bluetooth app from a phone.Which 30 amp b2b do you have? Which mppts?
There are other makes available but for me Victron takes some beating. They also have a 5 year warranty (I think) but hopefully you'll never need to call on it.