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Believe the bad reviews this company is producing garbage and not backing it up no customer service and no refunds. I have used mine less than 6 months and under 100 hours and it doesn’t work and blows 250 amp fuses could end up costing you way more the company is selling garbage in a box and literally says we don’t care and is aware there getting away with it, I had electrical company look inside after no response from the company and they said it is made as cheaply as possible. There are much better options pass on these poorly constructed and zero customer service companies just because there on Amazon or some you tubers use the product.
This unit has been charging my coach batteries off the engine generator for a month with no problems. It doesn't generate much heat. Be sure to set it up so that its only enabled when the engine is running or it will drain the chassis battery.
I've spent at least four hours (mostly on hold) over four different calls to sort out a tech issue with this charger and the techs were wrong every time. They misdiagnosed a condition where the charger would start charging two Lithium Ion Batteries and then the charging amperage would start declining after about 5 minutes until it eventually went to zero and shut off the charger. They first said it was a bad motherboard then, after changing out the unit for a replacement only to get the same performance from the new unit, they said it was a wrong dip switch setting. Answer (after a lot of trail and error on my own) the optional current limiting circuit needs to be connected because too much amperage from the alternator was choking the charger. Two weeks of my life I'll never get back... Also, I paid for a 60 amp charger but will only output 29 amps if I don't want it to overload and fail. Very disappointing.
I installed these units to charge the 2x 600ah battery bank(s) shown above.
My instalation draws power from a 250 amp engine alternator.
The charging units have primary input and output hookups of solid metal with machine screws to secure the wires. They also have 2x additional wire inputs. One wire input activates the unit, it will not charge untill voltage is applied to the "D+" terminal. This allows it to fuction as a battery isolator relay, whereby it wont charge untill its told to by the activation wire. It also has a second activation wire for a 50% power mode. This knocks the charging amperage down to 30 amps, and I highly reccomend wireing this lead to a toggle switch.
I installed 2x units and found that a 250 amp alternator cannot power more than one of these at idle engine speed. At highway speed and higher rpm, I can run both units at 60 amps. but at night time with all lights on in the RV, I can only run one at 60 amps and the other at 50% power without overdrawing the alternator.
The installation instructions indicate that they "may draw upto" 90 amps, but upon installation i havnt seen more than 65 amps.
I installed 2 of these units which is kinda crazy, i did it by isolating two battery banks with a giant diode array, in the form of a battery isolator diode set installed "upside down" on the negative terminal side. but take note that a 250 amp alternator can barely power both of them when tacked ontop of the other electrical load for the RV.
Installing one unit with a common 130-150 amp alternator it would be advised to install the amperage reduction function to avoid overtaxing the alternator at low engine rpm.
The units have internal cooling cans that SUCK AIR from the electrical input side, and EXPEL AIR on the electrical output side. This information is only apparent AFTER installation, so ill include it here.
2 gauge cable worked fine.
to install the activation leads, unscrew the tiny screw above the wiring opening, insert the wire, then tighten the screw. This information is not included in the instructions so i include it here.
Since you will probibly wire the activation lead to turn the unit on whenever the engine is running, advise installing an interupt switch for that lead, or a giant battery disconnect switch for the voltage input as I did.
UPDATE: I would love to say this a great charger, however I have received two of them and neither of them worked correctly. The first one was DOA when I received it. It cost me $200 to have it installed, only to have my installer tell me it was not working correctly, and pull it out. I sent that back to Amazon, but was out the $200 installation fee.
Stupidly, I bought a second one because I like the company. I again paid $200 to have this installed in my RV under the passenger seat where apparently it needs to go. This one worked, so I was happy with it. It worked well, in fact, for all of three days into my vacation, then I noticed on my battery monitor that there was no charge whatsoever coming from my alternator. On vacation, 2000 miles from home, I had to drive two hours to an RV place to have this unit taken out. Removal and reconnection of my old wiring cost me $220 this time. Now I am up to $620 in installation and removal fees.
I drove the rest of my vacation with the straight alternator and was fine. When I returned I called Amazon and they agreed to take back the unit even though it was past the 30 days. They said they would charge a restocking fee but that the fee would be waived once they received the unit. They now refuse to refund the 45.00 restocking fee because the unit is not in re-sellable condition, to which I can only say, Of Course not!
The long and short of it is that it cost me $665 to try to make this work and as much as I like the company, it doesn't. The units I got were defective and I would not order this again from them.
I have a 2018 Promaster 1500 136" WB Highroof. My vehicle comes with the stock 180 AMP alternator. I first bought the 60AMP but with further investigation, it turns out that with 60AMPS it will be straining my alternator. From the research that I've gathered it says from Renogy: "For alternators of less than 160 amps use the 20 amp charger, up to 180 amp alternator use the 40 amp, and for 200 amp alternators and above the 60 amp alternator can be used."
This is extremely important as you don't want to strain and replace your alternator unexpectedly. Nowhere in this listing provide you with this valuable information!
The box included the charger, how to set up, and stickers. No instruction manual.
I had to spend a lot of time to get this thing to work due to Renogy's terrible support. I had an issue with the charger having a solid green light but the charging amps on my shunt would jump around like crazy and eventually drop to zero. I found that this was caused by cheap thermal breakers on the input and output of the charger. Once I replaced with ANL fuses I get a stable charge from this thing. I submitted a ticket to Renogy and they were unable to help me and no matter when you call you're going to wait hours on hold. For this reason I think it's better to spend the extra money for a well supported and documented product from Stirling. Trust me the time you will waste on this thing isn't worth the $100 less in upfront cost.
The good Once everything is in order the product works as expected
The bad Renogy support is absolutely garbage Renogy manuals are terrible Not enough troubleshooting documentation.
I bought this charger for my new camper van to charge the house battery from my alternator. I selected the 60 amp model because I had a heavy duty alternator on my van. I had trouble with my companion battery monitor from Renogy giving me confusing results when using the charger. It turns out that I was grounding both of the input side and the output side of the charger to my grounding bus bar. I really should have grounded the input side of the charger directly to chassis ground. This will bypass the shunt for the battery monitor and give the correct charging amperage for the charger. The instructions did not warn about this potential issue. Now that I have grounded the input side of the charger directly to chassis ground the battery monitor senses is the correct amperage. My interactions with Renogy technical support were cordial, but not ultimately helpful to solve the problem. After several rounds of email they did send me a replacement unit for my battery monitor, but of course that didn’t fix the problem. Ultimately I needed to buy a upscale ammeter with the clamp function in order to diagnose my problems.
Installed into my Australian built Winnebago motorhome built on an Iveco Daily 50C truck. Installation completed with over sized cables and appropriate fuses. It operated perfectly producing a full 60 AMP charge to my 400 AH LiFePO4 Lithium battery bank. However, after a continuous run of about three hours an intense electrical burning smell was detected and the unit no longer operates. I did get an initial response from my supplier asking for more details and photos which I provided, but I am no longer getting any response from Sold by: Amazon Export Sales LLC
It would have been a great product for my needs of charging my RV house lithium batteries wIth the engine alternator. It was pretty easy to installed and worked as advertised for a few months. Then for no apparent reason it stopped working. Worse still it drained the engine battery. I had to physically disconnect the wiring. I submitted a support ticket with Renogy but never got a response. I replaced it with a Victron which has been rock solid.