By using sophisticated DC-DC convertors, MPPT regulators typically deliver around 20% more power to your battery than a conventional solar controller will!
The Emponi Sol1 regulator is new to us - made by a small German firm, it's nicely made and has the unusual feature that it can charge a 24V battery bank from a 12V nominal solar panel - although it is also highly efficient when used with 12V battery banks. For the budget-minded, the Chinese-made Juta regulator is astoundingly good value too - a 10A MPPT regulator at this price would have been unimaginable a couple of years ago.
We've been using MorningStar regulators for years, and they are extremely reliable. So the Sunsaver MPPT is one we would highly recommend. It has a complementary feature to the Sol1 regulator; the Sunsaver can charge a 12V battery bank from a 24V solar panel!
For large arrays, the Steca 2010 can handle up to 20A on a 12V or 24V system. For really large arrays, you're looking at the Outback models, which come with displays and lots of great features.
See our information page on MPPT regulators for more information on how they work, and why you can expect to get so much more power with an MPPT controller than you would from a conventional regulator.
Please note that the high-frequency electronics in MPPT regulators can sometimes emit a slight 'squeaking' noise - this is not a fault but you might want to mount the unit out of earshot!