With the introduction of Euro 5 and Euro 6 on its way in 2017, we can assume variable voltage alternators are here to stay. This fact is impacting directly on the Australian 4WD market with dual battery systems now requiring something a little smarter to keep the charge up to the auxiliary battery. The Thunder DC to DC Charger (TDR02010) utilises a unique pulse charging algorithm with the intelligence to determine the best charge rate for your auxiliary battery (excluding lithium). We believe we have one of the best additions for your 4WD or camper ready to be installed. Included in this state of the art product is an MPPT solar regulator that is able to regulate up to 300W of solar @ 25V, this means that the TDR02010 will regulate your solar panel at maximum efficiency. With a 20A output the TDR02010 has more than enough power to charge your auxiliary battery while you are driving. Once the vehicle is turned off, the DC to DC charger will switch to the solar input when the main battery drops to 11.9V. An easy to read display shows your battery charge percentage and a Thunder logo that lights up in 10% increments, not only does the TDR02010 perform outstandingly it looks the part making it a welcome addition to your 12V setup. Installing the TDR02010 could not be easier with 4 mounting holes and 4 easy-to-use wiring studs there is minimal fuss to the unit. The TDR02010 is able to be installed into everything from a 1960 40 Series Toyota LandCruiser right up to a 2016 Ford Ranger.