Rohr MPPT-20 MPPT 20 Amp Solar Power Charge Controller, 300 Watt at 12V / 600 Watt at 24V
It does do the job well, though if you have a question, customer support is non existent.  I found out on my own that In an RV installation, the house batteries apparently do not need to run through the regulator and then to the RV feed (load).  Doing so introduces several tenths of a volt drop from the battery (depending on how much current is being drawn by the RV load), though connecting as per instructions will disconnect the RV feed if the battery voltage gets low.  I connected the panels to the solar 