I ordered some more #4 welding cable, some more ring connectors, bought a good linemans cutters from Home Depot (to make a clean cut in the #4 cable), as well as ordered a manual hammer crimp tool to connect the ring connectors to the #4 wire. 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. 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. Do not reverse the polarity since the reverse polarity of the battery connections can cause injury and damage to the device. These are very reliable connectors (used for things like powering winches and snowplows), have a nice weatherproof cover, and are rated for 50amps of power. 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. But in the UK, PV output isn't great. DC-DC are used in 2 x battery systems where the starter battery charges the house battery to 100% in vehicles or boats. It has multifunctional safety technology including over-voltage protection, over-temperature protection, and reverse polarity protection to make it safer for use. Step 4 : look for a path to run the single positive #4 cable from the engine compartment all the way back to the tail of the Truck. Both ways can be charged at the same time to minimize charging time. Please allow up to 1 to 2 business days for processing and 3 to 5 business days for shipping. This multi-stage, multi-input battery charger can charge a service battery from a starting battery linked to an alternator or by utilizing solar panels connected directly to the unit. The red dip switched needed to be set for lithium, and in our case, that was : The phone jack , black plug is for temperature regulation (not needed for our Lithium setup), the Green terminal connector, is actually the ONLY on/off switch on this unit. 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. 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. The DC-DC battery charger isolates the input and output to prevent voltage transmission errors and interfere with house battery charging. What type of alternator is this on-board battery charger compatible with? You can get a decent 2000 watt generator for about $700-900. I use a small fan to help it stop overheating. Key Features The general quiet and tranquility of being out camping is part of the magic. The Victron pair you're leaning towards is an excellent choice. Ive only just found the time to instal, which went easily and well, and am yet to finalise the perimeters for the very best set up..but first I need the BVS.. circles upon circles, who knows maybe the ignition wire will come in handy after all. Step 1 :be sure that we have an alternator in our 2017 Ford F-150 that can handle the extra power that we are trying to send over to the camper. Everything was connected up and it just works. Renogy's 12V DC to DC On-Board Battery Charger 6 Gauge Ring Terminals Heat Shrink Split Loom Flex 201/2" Machine Screws 20 Lock Nuts Rubber Splicing Tape Vinyl Insulation Tape Crimp Tool Step-1 Inspect The Goods Straight out of the box, a quick look at the battery charger reviled a questionable burn mark on the power terminal! CE certification. The LC wire can automatically adjust the charging current to prevent excessive charging current from damaging the house battery. We went with a 40amp model, but they also make them in 20 and 60amp. 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). I then bought a wirthco battery doctor, but then found out that is not really designed for deep cycle batteries. This implies that various levels are employed while the battery charges. This multi-stage, multi-input battery charger can charge a service battery from a starting battery linked to an alternator or by utilizing solar panels connected directly to the unit. 12V 40A DC to DC Battery Charger w/o Solar Input. Attach connector plug to the tailgate of the Truck. 3. At this point, it was WELL PAST happy hour. Is it necessary to connect? Do not reverse the polarity since the reverse polarity of the battery connections can cause injury and damage to the device. 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), 12V 40A DC to DC On-Board Battery Charger, DCC30S 12V 30A Dual Input DC-DC On-Board Battery Charger with MPPT, 1000W 12V to 230V/240V Pure Sine Wave Inverter With English Standard Socket (with UPS Function), 12V 60A DC to DC On-Board Battery Charger, 3000W 12V Pure Sine Wave Inverter Charger w/ LCD, 12V 200Ah Lithium Iron Phosphate Battery w/ Bluetooth, 12V 100Ah Lithium Iron Phosphate Battery w/ Bluetooth, RBC3050D1S Fuse Installation Instructions, Monitoring Screen for DC-DC MPPT Battery Charger Series manual, Operating Temperature Range : -31F~149F / -35C~65C, Dimensions : 9.6 x 5.7 x 3.0 in / 244 x146 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. 18-16AWG copper cable recommended. The charger will overheat and go into error 6 mode when driving using the alternator. Great bit ov kit once up a running would Recomend, im running 640 watt renogy panels, 2000w Renogy inverter, Renogy Bluetooth, x2 Renogy smart lithium batteries, and dc50 mppt charge controller. This 20A DC to DC Charger is designed to charge secondary batteries while driving using the primary battery connected to the alternator. UPDATE Feb 27th, 2020 - I decided to buy myself a Renogy DC-DC charger meant for the task. I verified that, even IF the DC Charger has its red DC ON wire connected to power, the unit will NOT turn on, unless it has incoming DC power. step 9 : terminate the positive and negative #4 wires with the Anderson connector ends, add Anderson plug and rubber boot. 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. 4. Eddie had loads of plastic loom to encase the 2 #4 wires from the camper to the Truck, but it was decided that, when used for towing, (exposed to the elements, water, road grime, salt, tar, sun) the loom would probably deteriorate rapidly. How to choose a suitable battery charger? 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. How to set the charging voltage value of the charger? It has multifunctional safety technology including over-voltage protection, over-temperature protection, and reverse polarity protection to make it safer for use. That seems to happen regularly on newer alts., so you need the signal wire attached to the D+ wire of the alt. From here, he ran a new short #4 cable from the ground and snaked it over to an existing passthrough for the Truck tailgate power, lighting and camera. 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. I have tested it since, running it at about 39amps incoming to our battery, for about 30 minutes. These guys are RV upgrade masters, and although their installs are relatively recent, it seems they are happy with the Renogy charger. 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. Renogy DC to DC Battery Charger InstallRenogy 60A DC to DC Battery ChargerCompatible with a multitude of alternator types, this 60A DC to DC Battery Charger . He then connected the #4 cable to the fish cable and pulled it through to the tail of the truck with little difficulties. With RJ45 communication port featured, you can unlock monitoring features exclusively using the BT-2 Bluetooth Moduleand Renogy DC Home App, control and monitor the device remotely through your phone in real time. Disconnect the two wiring harness connectors under the driver seat, one is white and one is yellow. Just the 7 pin trailer connections. Renogy's DC to DC MPPT on-board Battery Charger is designed to give you options! Im calling Renogy Monday morning but hoping to figure it out sooner than later. The DC-DC battery charger adopts the design of the DIP switch and it provides 6 charging voltage settings through five gears. output voltage drops to low, around 12.5 volts, the Renogy unit will stop charging the "house" battery. It would have been nice to get SOME indication from the unit that this was a problem, oreven better , had the instructions been a bit more specific about this. Connecting to the A2 upfitter lug - This is where you can source up to 250 amps of power and is left open for upfitters, this is where i connected my 4 awg wire. Is it necessary to connect? We were headed from Green River to Moab, UT which is about a 1 hr drive. With Pandemic shipping times, I didnt want to wait too long and had it shipped to a future destination a few days into our future itinerary. Links to all products Cahn uses below. 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. However, I did find that not supplying the BVS which is required but supplying the ignition detection wire that isnt was odd. step 11 : slippery silliness ! The Terminal fuse protects the wire from the battery to the breaker, then the breaker protects the wire run along the length of the truck. This design method can well prevent the starting battery from being over-discharged during the charging process. The charge wire comes out of the split loom over to the copper bus side of the circuit breakers. 18-16AWG copper cable recommended. It accepts and regulates a charge from either (or both) your starting battery (alternator) and solar panels, acting as both battery isolator/charger and charge controller. See photo 5.8. We looked at the instructions a few more times, even searched for a more recently updated version of the instructions as a pdf (in case ours were out of date). The new ground wire was working as expected, and the red dc wire was turning on the DC unit. For additional safety, it isolates the input from the output preventing incorrect voltage transmission. This high-quality battery charger has multiple intelligent protections including battery isolation, over-voltage protection, battery temperature protection, over-current protection, overheat protection, reverse current protection, solar panel and alternator reverse polarity protection, guaranteeing charging safety and protecting your batteries. I solved this problem by installing a switch to isolate the solar when driving and in this way the alternator side produces and charges at 50 amps. 1. The battery temperature sensor for DC-to-DC car battery chargers can be purchased at the Renogy store. The RV came with a mechanical solenoid isolator b. 2. 1. For our style of camping, having only solar power, we are covered for about 90% of the time. Connect the - to a factory ground point under the drivers seat. The wire gauge is so small (like 12g?) Considering which equipment to buy I downloaded instruction manuals from various manufacturers and found Renogy was the most straightforward to understand so I bought from them an ac-dc charger, a lithium battery, the dc-dc DCC50S with a BT2 and a 1000w inverter. Protect Your Starter Battery Connect + to the Power Distribution Center (PDC) that hangs off the starter battery terminal and add an appropriate size Midi fuse to the PDC. Meaning your panel array can be much larger when using the NLDC-40. This is how Ray at Love Your RV did his install, and it seemed to work just fine for him. This charger was chosen for price and capability. 50A DC DC Board Battery Charger with MPPT Renogy 20/40/60A DC to DC Battery Charger Rover 20/30/40/60/100 Amp MPPT Charge Controller Rover Elite 20/40A MPPT Solar Charge Controller 40A Set w Holder ANL Fuse, 40 amp (40A ANL Fuse Set w/Fuse) Renogy One All-in-One Smart Panel System Energy Monitoring ; Nominal System Voltage : 12V DC : 12V DC To be fairthe diagrams, troubleshooting in the Renogy instructions for the DC-DC Charger arereally, really vague, super-specific to drivable RVs only, and in general just kind of suck. 1. This wire will handle up to 45A and reasonably hot temps inside the engine bay. 3-phase MPPT Charging Technology Your email address will not be published. The DC-DC Battery Chargers are the most effective way to charge your house batteries from the starter battery. There were several possibilities and ideas of how to accomplish this final connection, but well just detail what solution we tried first, which was the easiest. If you have any questions, please contact us in time. This was puzzling to me, since it would seem that a 40amp DC charger wouldnt draw more than 40amps. This multi-stage, multi-input battery charger can charge the house battery from a starter battery linked to the car alternator or by utilizing solar panels connected directly to the unit. Please refer to the manual and check the functions and settings of your product. and THERE WAS ! Renogy Dual Input DC-DC On Board MPPT Battery Charger with its built-in VSR allows vehicle owners to enjoy the benefits of fully charged deep cycle service batteries while reliably isolating it to the engine starting battery with one easy-to-install charging system. We decided to try a DC-DC charger from Renogy . Starts out fine when I run engine and turn on lights. To get 40A @ 13.6V (544W) youd need 47.3A @ 11.5V. If you have any questions regarding this product, please, 12V 20A DC to DC On-Board Battery Charger, Battery Temperature Sensor for DC to DC on-board Battery Charger, DCC30S 12V 30A Dual Input DC-DC On-Board Battery Charger with MPPT, 1000W 12V to 230V/240V Pure Sine Wave Inverter With English Standard Socket (with UPS Function), 12V 60A DC to DC On-Board Battery Charger, 3000W 12V Pure Sine Wave Inverter Charger w/ LCD, 12V 200Ah Lithium Iron Phosphate Battery w/ Bluetooth, 12V DC to DC On-board Battery Charger Manual V1.2. What is its purpose? 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. Hey guys, so I've been meaning to figure out how to properly have my alternator charge my house batteries. Love it. I anchored these to the wall so there would be no real stress points and tested all connections. 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