I would like to see the charger use an algorithm when driving, so it measure the solar output which would gain what ever it needs from the alternator. They take the voltage and current of the input and transform it to a usable voltage/current for the output. Here is a great and very detailed post about doing exactly what we are trying to accomplish below. Note: Our product department found that there are some errors in the paper manual attached to the battery charger sold before March , and now the manual on the website has been updated. The DC-DC battery charger will charge your house batteries from the starter battery by 3-stage charging (Bulk, Boost, and Float), to make sure it optimally and automatically charge to 100%. The Renogy also offers trickle charge to the starter battery from the solar if it is required, while the Redarc does not. Renogy 40A DC to DC Battery Charger ; Nominal Voltage: 12V: Rated Charge Current: 40A: Output: 500W: Idle Power Consumption: <0.4A: Input Voltage Range: 8V-16V: . Stage 1: Boost- this offers the greatest voltage possible when charging a depleted battery. The DC-DC battery charger is capable of identifying whether the generator is started, to prevent over-discharge of the starting battery and protect the generator. That seems to happen regularly on newer alts., so you need the signal wire attached to the D+ wire of the alt. Thanks for the update. To get 40A @ 13.6V (544W) youd need 47.3A @ 11.5V. Its only when we are socked in for a few days in a row with absolutely no sun in sight that things start to run a bit thin. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); im out at Hartman Rocks, just outside of Gunnison, CO. So added a 60A rated relay to cut off the PV input, controlled by the D+ (engine on) feed on my Sprinter W906, so can charge LiFePO4 batteries at 50A from ALT input (need appropriately sized cable from starter battery) when the engine is running. Check out our UPDATED DC-DC charger review and installation video:https://youtu.be/6nAFz8mF7k8Happy New Year everyone!We took time off over the winter break . : The theory was, wed use one long run of the #4 welding cable to run from the Trucks battery, all the way to the tail of the truck. The idea is, the alternator on the your tow vehicle (or in the case of a van, or drivable RV) creates extra surplus power that can be used charge the house batteries of the camper. What will happen if the service battery is fully charged? For battery settings please refer to the Manual Book on page 12&15. A typical installation of a DC-DC charger. step 9 : terminate the positive and negative #4 wires with the Anderson connector ends, add Anderson plug and rubber boot. Be careful not to over-torque the terminals on the DCDC as over-torquing may cause irreparable damage (Do not exceed 16 N-m / 3.3 ft-lb). We were headed from Green River to Moab, UT which is about a 1 hr drive. I now have to order that part in order of the above item to work more precisely. If the solar is producing any power at all - it splits the charging capability equally between the two sources. renogy dc to dc battery charger 20a, 40a, 60a Victron has many versions available for 12, 24, and 48 Volts. The DC-DC battery charger isolates the input and output to prevent voltage transmission errors and interfere with house battery charging. So, we really dont need more battery capacity just an alternate backup system to recharge the batteries when there is no sun for the solar setup OR there was to be some sort of problem with our solar setup (such as a malfunctioning solar controller, etc.). The D+ Ignition cable is a design method used to identify whether the generator is started. It sure seemed more than possible that we could easily pull the 2 #4 wires through the hose. Check out Rays video on this subject at this point of the video linke : https://youtu.be/ww_4yhQPGwY?t=643 . The charger will overheat and go into error 6 mode when driving using the alternator. The all-in-one NEG- terminal with partition design integrates the terminals for solar panels, the array starter battery, and the house battery, avoiding misconnection and making the simple installation. This controller supports Gel, AGM, Flooded, and Lithium battery, but please make sure to set the correct battery type once it is installed. This manual showed me the two connections points I needed to make on pages 245 thru 248, one for 70 amps of power going to my DC to DC charger located in the rear of the van and the other was a small 12v signal wire that is used to turn the DC charger on ONLY while the engine is running. We decided to try a DC-DC charger from Renogy. What is a DC-DC charger? High-quality DC-DC chargers are three-stage chargers. The DCC12 Series battery chargers are the most effective way to charge your auxiliary or house batteries from the alternator/starter battery. Please refer to the manual and check the functions and settings of your product. I have some 4AWG that I think I can repurpose, or I'll just buy new wire off Amazon or something. Similar to what Ray did, we wanted the install to be set up in a way that we have the option to only turn on the DC-DC Charger when we need it. The D+ Ignition cable is capable of identifying whether the generator is started, to prevent over-discharge of the starting battery and protect the generator. It's the smart way to keep yourself fully charged and off-grid longer! The DC-DC battery charger is installed between the starter battery and the house battery. As a bonus it can be reduced to half power if full output is not required (like for example the first few minutes after engine start with a timer relay). Well minor issue on a recent trip when we finally really tested this setup. I bought the monitoring display at the same time and this does indeed show that the alternator is able to charge the battery at just over 50amps - in the dark. Reinstall seat bolts, dust cover and reconnect the two wiring harnesses and the main battery disconnect.Thats it, not too to bad once you've done it but nerve racking the first time for sure. Renogy's DC to DC MPPT on-board Battery Charger is designed to give you options! - They are easy to mount and secure, ideal for off-grid, on-grid, and . See photo 2.3. Pass the two #4 wires through the floor of the camper into the battery compartment. Protect Your Starter Battery Of course, this step got repeated a few times on the cabling on the Truck and inside the camper, just showing his current method. this was something I could handle on my own (with some advice from Eddie, naturally). Installing your own DC-DC Charger at home is actually incredibly simple when you follow this easy step-by-step guide! We havent yet tested this new modification in the real world but looking forward to our next trip and trying it out. Pretty good in theory, but it was much much harder to accomplish the cable pull through the hose. We thought, how about a section of hose ? This side of the DC Charger is the Incoming power from the hose connector, the two #4 cables that run out of the camper, along the frame, and can be connected to the Truck-side Anderson Connector plug. Obviously we can change our power consumption habits to adjust to the lack of sun (not using the microwave, not using the electric water kettle etc), but even then, after 3 days with no sun, our batteries start to dip down to low levels. Charger Bob L on Jun 23rd 2022 Solar is to be fitted over the next couple of months again we will be getting a renogy kit, well worth the money our last big item will be 3000w 12v inverter to run all our electrical equipment, We are well pleased with all our purchases. Next up was creating a camper-side connector wire, which would run from the tail of the Truck, along the inside of the A-Frame of the trailer, and terminate inside the camper near the battery compartment, existing inverter, and the soon to be installed DC charger. In the picture below, was the existing setup done by Eddie back in the Summer of 2017, showing all the DC loads and Trailer Frame Ground coming in to the left side of the shunt. BTW this mod is working great, when we need it, it really fills up our lithium batteries quickly. Biases to solar power when it is available. This is true of any DC-DC charger, not just Renogy. In short, Id suggest youre probably better off with a higher rated. This battery charger is compatible with both traditional and smart alternators. Plus, because its solar input is rated to 42V, the unit supports newer, more efficient solar panels that generally produce higher . For the RV system, The generator ensures stable power supply to the starter battery, and uses the extra power of the starter battery to supply power to the house battery. 1. In countries like the U where the sun is low or never out at all, you need to add a solar power cut off switch, this will fool the charger in thinking its nigh so will go from 50% 25 amps per 50 mode to 100% mode. You can get a decent 2000 watt generator for about $700-900. This is a good quality hose, very pliable and wide. If the efficiency of the DC charger is 95% then that would need 49.8A @ 11.5V. This guy Matt at Adventurousway.com has some great info ok on with the show ! This controller supports Gel, AGM, Flooded, and Lithium battery, but please make sure to set the correct battery type once it is installed. Nowadays, they are getting cheaper and more reliable. The charger needs to select the charging mode according to the battery voltage. One simple way for us to solve this issue would be to just add a third BattleBorn Lithium battery. 18-16AWG copper cable recommended. 1. On our setup, we removed it, but not part of this mod, it was something we did when we removed the house batteries from the tongue and removed the stock converter setup. Disconnect the main battery - This wasn't so easy, there is a small (5\" x 5\") plastic cover to the right of the accelerator pedal, pull it from the top and then pull up hard, its not easy bu t it comes off. So we did just that and changed out our 50A breaker for a 60A breaker. And finally, connect the a DC positive wire to switch ON the converter and see if it works. 3-phase MPPT Charging Technology In Eddies research and in talking with Ray, Eddie determined that it was possible that the DC-DC Charger needed a ground from the camper as well, to complete that entire circuit. Step 5 : make a nice ring connector on the engine end of the #4 wire. DC-DC Chargers are essential components for properly charging and maintaining your second battery bank in your dual battery bank system. The Renogy hides the input cables and uses posts to connect the ca. Please allow up to 1 to 2 business days for processing and 3 to 5 business days for shipping. How to choose a suitable battery charger? Renogy's DC to DC MPPT on-board Battery Charger is designed to give you options! step 17 : So now that we knew everything was rewired and working properly, it was time to connect the DC ON wire to a 12 volt source, in our case, some running lights so that when the truck is in tow mode you could send power, if desired, to the DC Charger. And we decided to just shut it all down and have a well deserved adult beverage or two and catch the remaining bits of Arizona sunset. SW5 switch is the selection switch for switching between lead-acid batteries and lithium batteries. 2. If you were going to own the van for 10 years, which would you put in? I was able to return the original DC unit to Amazon, now that I had a second unit directly from Renogy (now that we knew the original unit was not defective). I am experiencing the same problem for my 2.0 amp Renogy charger no green light. What will happen if the service battery is fully charged? I screwed down the DC unit to the wood blocks which Eddie had already connected to the Camper floor. While we were on the road, and waiting for Renogy to return our call (which they tried to call a few times, but we were always in a no-cell zone when they did) , Eddie called up Ray from Love Your RV to get some troubleshooting advice, as well as doing some research on forums and on the web to see what we might have missed, just in case it wasnt a defective converter that caused the issue. fantastic item chargers leisure batteries and the starting battery also i have the blue tooth module to view the status, wish id bought this at the beginning of my build ,its excellent ,chargers leisure batteries and then the starter battery ,its also worth getting the BT module so you can see the specs while charging via solar, excellent item does flow back to starting battery when leisure batteries full , easy to fit and understand instructions , doesnt come with a bt module i suggest you order one , ideal to plug solar into as this does it all. I wanted something which could be a simple current limited charger for a LFP battery and yet only be on if the alternator was running (D+). The DC-DC battery charger isolates the input and output to prevent voltage transmission errors and interfere with house battery charging. Disconnect the two wiring harness connectors under the driver seat, one is white and one is yellow. Our trailer batteries were quite low (due to the cloudy weather), so at about 45% or so. 12V 20A DC to DC On-Board Battery Charger. The charger is overheating in Scotland in Mid winter and where the charger sits its about 15c and it has plenty of air. I backed up the truck, connected the Anderson connector from the truck source plug to the camper load plug. Well post some feedback once we use it ! They are available on Amazon as well as directly from Renogy. Luckily Eddie had access to a fish wire, which easily passed through the channel. Well after having this fitted for just over 2 weeks I can honestly say how easy it was to fit. Renogy DC-DC On-Board Battery Charger is designed to charge service batteries from a starting battery linked to an alternator or by utilizing solar panels connected directly to the unit, offering multiple charging options and ensuring your battery stay fully charged. 4.1 Mount the Battery Charger 4.2 Location Considerations 4.3 Connecting Temperature Sensor 4.4 Connecting IGN Signal Wire 4.5 Connecting Battery Voltage Sensor 4.6 Selecting the Battery Type 4.7 Connect the Battery Charger 4.8 Typical Setup 4.9 Cable and Fuse Sizing 5 Operation 5.1 LED Indicators 5.2 Charging Logic 5.3 Solar Charge Algorithm There are two LED lights above the dip switches, and if it was powered on and working properly, we should have seen a green light on the left side. I located an upfitter manual on the Mercedes site ( https://www.upfitterportal.com/en-us/files/en-us/beg/my20/sprinter.pdf), it required an email in order to download, so don't let that stop you if you can't download it without providing an email. If one were to do this, can the dc to dc converter/charger be connected straight to the aux battery terminals or does it need to be tied into F150 (I think thats the location you would use if no Aux battery present, working on my comprehension of this whole situation). 5. 3. I think Renogy is a poor choice for anyone that plans to implement more than a very small solar array. If you have any questions regarding this product, please, 2.65 X 1.38 X 0.55 in (67.3 X 35 X 14 mm), SBPVW (Self build panel vans with windows) on Mar 23rd 2021, 12V 20A DC to DC On-Board Battery Charger, DCC50S 12V 50A DC-DC On-Board Battery Charger with MPPT(New Version), 12V 40A DC to DC On-Board Battery Charger, 12V 60A DC to DC On-Board Battery Charger, 12V 100Ah Lithium Iron Phosphate Battery w/ Bluetooth, RBC3050D1S Fuse Installation Instructions, Monitoring Screen for DC-DC MPPT Battery Charger Series manual, Alternator Input Voltage : Traditional Alternator: 13.2-16VDC Smart Alternator (Euro 6): 12-16VDC, Operating Temperature Range : -31F~149F / -35C~65C, Dimensions : 9.6 x 5.7 x 3.0 in / 244 x145 x77 mm, Communication Port:RJ45 (RS485 Protocol), Operating Temperature Range: -4F~113F / -20C~45C, Dimension: 2.76 x 4.33 x 1.25 inch / 70 x 110 x 31.8 mm. I went for a photon universe 200w solar panel since Renogy didnt have a comparable device available. Eddie and I thought it was indeed possible that the specific unit we installed could have been faulty, we had no way of knowing. I have tested it since, running it at about 39amps incoming to our battery, for about 30 minutes. Featured with Remote Temperature Sensor Port, the Voyager can measure the temperature at the battery in real-time and uses this data for very accurate temperature compensation for both too high or low battery temperature, and thus adjust charging voltage to assure stable and constant charging to the battery. Considering this when calculating cable sizes will avoid voltage drop and overheating complications. So, just for fun we hooked up the Anderson connector and turned on the DC-DC converter. 3. Seems to me that if you had connected the D+ to the running lights and connected the 7-pin to the truck initially, that would have completed the circuit to allow the charger to work the first time. step 11-b : make the run along the frame with the garden hose (two wire #4 cable) secure with plastic anchors which are bolted into the steel frame. Similar to the 7pin connector on a travel trailer or 5th wheel (that runs the camper running lights, brake controllers, and actually can send a little bit of dc power to your camper, but mainly for trickle charging at a low amperage), the idea is to run another high-amp connection from the tow vehicle (on an additional / separate cable to the 7pin towing cable) which is capable of delivering much more power directly to a DC charger which is connected directly to the house batteries of the camper. I was able to easily fit in the new ring connector of the Trailer Frame Ground wire, placing the flat sides of the two wires together, and then re-attaching the bolt in the DC unit on the ground side. At this point, the Truck prep and wiring was complete. This wire is included with the charger. Please note the D+ Ignition Cable is not included. However, since standard/traditional alternator has a fixed voltage when charging, while smart alternator has a controlled charging output based on operating conditions, it is required to connect the charger to the smart alternator through the Vehicle Ignition Port by the IGN Signal Wire comes with the package. The battery temperature sensor for DC-to-DC car battery chargers can be purchased at the Renogy store. That would make a nice durable coating/covering for the 2 #4 wires. However, I did find that not supplying the BVS which is required but supplying the ignition detection wire that isnt was odd. Also it seems like not alot of folks have the power and heated seats so there wasn't much info on wiring bit. Luckily Eddie had a fancy pneumatic ring crimper, perfect for this #4 wire size. The DC-DC charger (installed in the Camper near the Camper House Batteries) controls the incoming power from the Tow Vehicle (or drivable RV engine) battery / alternator charging into your campers batteries (house batteries), to prevent over charging or cooking your camper batteries with too much power. Renogy's DC to DC MPPT on-board Battery Charger is designed to give you options! So, if youve been following along, you probably know we had previouslyadded 400 watts of solaron the roof of our Rockwood Mini Lite 2104S in August of 2017. Therefore, Eddie asked me to do a quick test : take a jumper cable, and make a direct attachment from the Frame Ground on the trailer (which we have one easy to get to right under the A Frame of the trailer), and then take that same polarity of the jumper cable and attach it to the Frame Ground on the Truck. The 50A Renogy will be ok, but "might" stress the battery. See photo 1.2. Eddie recommended the following gear, which we mostly bought from Northern Arizona Wind and Sun (highly recommended retailer!) We have room in our battery compartment for another battery, so this would be an easy modification. Option: Monitoring Screen for DC-DC MPPT Battery Charger Series. hi Jim, thanks for reading. Polycrystalline panels are cheaper, but they are also less efficient. This side of the DC Charger is the outgoing power, which connects to the camper batteries. I appreciate Eddie explaining ( a few times ) , the exact steps Id need to do to finish this one on my own. 4. 18-16AWG copper cable recommended. Eddie added some scrap wood and drilled it to the floor of the camper, right next to the Inverter. The new Orion-Tr Smart DC-DC charger is designed for use in dual battery systems in vehicles or boats, where the (smart) alternator and the start battery are used to charge the service battery. My search stopped at the Renogy with the DCC50S, not Australian made but, because it was precisely what I wanted and at a sub $350 price (at the time). When connecting the charger and the battery, make sure the battery poles are clean when connecting the terminals, select a sufficient cross-section for the connection cable, tighten the nuts and bolts with proper torque as loose connections may cause overheating. Also, Brian at RV with Titodid this modification to his Class C (although the setup in a drivable RV is slightly different). Connecting to the DC+ lug for a light power source that is only powered when the engine is running. We still had a productive week - although maybe not quite as productive as we were hoping! Easily install the compact yet sturdy DC-DC battery charger on RV's, commercial vehicles, boats, yachts, and many more applications! Anybody got an idea? Renogy 20A 12V DC to DC On-Board Battery Charger is designed to charge secondary batteries while driving using the primary battery connected to the alternator. I needed a reliable DC to DC charger with solar input which had a maximum battery input of 50 amps. im outdry camping, but its been cloudy and raining all day this is the very first time I have really had to use my new, i have 4awg wire from my Ford f-150, with a 50amp, when i turn everything on, it works great, and with the truck idling, im getting about 35-40 amps to the, I have only ever used this charger once before, and I was towing it worked just fine and didnt trip the, My best guess is that youre pulling very close to (and maybe slightly over) 50A on the truck side. Instead of burning lots of #4 cable to run both a positive and negative, wed just run the positive from the battery, then use the frame as the negative return. Renogy DCC50S 12V 50A DC Board Battery Charger. Much like a Solar Controller, the DC-DC Charger needs to know your battery chemistry as well as the recommended voltage range so that it can properly charge. 18-16AWG copper cable recommended. 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