This nifty charger by Renogy is simply the smartest, best value on the battery charging market. With 30A of output, this charger can take our GoWesty LiFePo4 battery from dead to full in just two hours of driving!
After hooking up only five wires, all of these features are handled by this Renogy charger:
• Battery Isolation to separate the auxiliary battery from the main battery.
• DC-DC Charging for 30A of rapid, safe charging from while you're driving.
• MPPT Solar Controller to get the best performance from your solar panel.
If you're setting up an electrical system to quickly charge your auxiliary battery - and especially if you're jumping into the 21st century with a LiFePo4 battery setup - this DC-DC Charger could be everything you need in one box. Check out the "Features" tab to see more details on how all these fancy electronics interact.
If you want to actively monitor your battery with this charger, check out the BT-2 Bluetooth monitor in the related products below.
Note: This charger does not include the wires/terminals required to connect it to your batteries or solar panel.
There's a lot going on in this charger, and that's the best thing about it! Here's a more in-depth run down of how all these features are integrated:
Isolation: Battery isolators (like our Aux Battery kits) allow you to discharge your auxiliary (also called “coach or “house”) battery without draining your main (also called “starter”) battery. This is the whole point of having a second battery, enabling you to run a fridge, heater, lights, etc. and still know that you’ve got juice to start the van the next morning. This Renogy unit senses the voltage of the main battery, watching for alternator voltage to isolate the auxiliary battery automatically, and has status lights to tell you when it’s charging. Crucially, this charger can unlatch the BMS on a LiFePo4 battery if it goes into a disconnected mode, so you can recharge it after you fully draining, freezing, or overheating your battery.
DC-DC Charging: A battery isolator supplies alternator voltage to the auxiliary battery while the vehicle is running. For many Vanagon owners, a simple isolator or solar panel is adequate to keep an aux battery topped off. But for those that want to take advantage of fast charging with LiFePo4 batteries, those with large battery banks, or Eurovan owners that need to charge LiFePo4 batteries off of their "smart" alternators, a DC-DC charger is really the only way to go. This Renogy DC-DC charger, unlike a simple isolator, can independently adjust the charge voltage of the auxiliary battery to a higher voltage than the alternator puts out. The charge profile can be varied to work with any common aux battery, so that the charge voltage can be optimized for any type of battery and its state of charge. This allows for rapid battery charging at as much as 30A. With this Renogy charger, two hours of driving can fully recharge a GoWesty LiFePo4 battery!
MPPT Solar Charge Controller: Most important for the typical camper with a single 100W panel: this MPPT controller is much more efficient than a typical PWM controller. Using an MPPT controller under common conditions, your solar panel will supply 25% more power to your battery than it could with a PWM controller. That difference is huge if you only want to store one solar panel in your van. The integration of both an MPPT and a DC-DC charger into one unit also allows for a lot of clever operational features. The MPPT solar controller alone can charge at up to 30A if you have a large array of panels. Solar and alternator power can be used at the same time if you have a fixed solar panel on your van, resulting in a combined maximum of 30A charging with less load on your alternator. You can also use the solar input to charge your main battery in addition to your aux battery. This main battery float charge is only enabled when the auxiliary battery is fully charged so that no solar power is wasted.