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10-12-2022, 07:45 PM #11
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I read all that you're talking about and decided against WFCO. I went with the PowerMax PM4 55A. No auto detect, it's got a good old fashioned dip switch, and a rheostat to adjust the cutout voltage.
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10-14-2022, 04:25 AM #12
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- Dec 2021
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- Sicamous, BC
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That sounds like a better choice, I'm curious how the cut out voltage works? Are you using lithium?
My WFCO reverted back to default AGM LA settings. I had to go thru a total discharge charge cycle process again, they have two procedure you can follow. The first one which I followed this time is very cumbersome & time consuming. WFCO thinks this is a game changer Ha! Much easier, faster & simpler to change a dip switch setting & have the converter in a permanent mode.2022 Solitude 310GK, Factory option Include, Dual Pane Winders, Slide Toppers, Solar pacakge, Gen Prep, Pull Out Kitchen & Heat Pump
Cheaters list so far Includes, Snap Pads, 2ea 200ah Smart Heated Lithium Batteries
2014 Sierra 3500HD Duramax LWB SRW
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10-14-2022, 08:33 AM #13
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- Apr 2021
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I purchased a Powermax 100A and I am happy about that too.
I do understand why manufacturers make stuff that does things automatically. It prevents people from screwing things up. Sadly, when these 'automatic' versions of products first come out, it rarely works like it did at the factory. I do believe some day, it will, but right now, it appears that it does not.
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10-14-2022, 09:24 AM #14
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11-27-2022, 09:41 PM #15
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- May 2021
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- St. Louis, MO
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I have been using the stock WF-8735P with two 100ah lithium SOK batteries for over a year. I had to use the generator this past weekend to recharge the batteries due to no sun for days. Unfortunately, only 6 amps were going to the battery while running the generator, yuck. I'm now looking at my converter options. The Progressive's "direct replacement" PD4135KW2BV is a different size than the 8735 and I'm unsure what that means for the installation. I have read about Progressive's converter PD9130LV, but I'm unsure how to wire it with the existing 8735. I don't like what I'm reading about the WFCO 8700 AD series and how it detects lithium. The WFCO WF-8735-PB-LIS would be preferred, but I can't find it for sale. Bah!
I just watched a video on someone replacing their 8735 with a PD4045 and how they drilled new holes. I'll have to look if new holes for the PD4135 will work for me.2021 Imagine XLS 23bhe
2011 Jeep Grand Cherokee Overland v8 4WD | 7,400 tow | 6800 GVWR - Sold
Husky WD 30849 w/ sway control kit | Tekonsha brake controller
Jeep + driver and 2 passengers = 5,990 | Trailer = 6,520 | Tongue = 760
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11-28-2022, 07:16 AM #16
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- Sep 2020
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- Thunder Bay, Ontario, Canada
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I'm looking over the powermax converter/charger. It says "With our 3 Stage Smart Charging & adjustable power supply modes". Seeing as you have one, what exactly does it mean by adjustable power supply modes? Can you select FLA or LiFe? Can you adjust max charge and float voltage? What I was reading wasn't abundantly clear.
2018 Dodge 3500 6.7 Cummins SRW w/Aisin
2021 Reflection 303RLS
New to RV'ing since 1997
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11-29-2022, 09:03 PM #17
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Here is my take and take is loosely.
Yes, it does have a three stage charge cycle. From my understanding, mostly for lead acid/AGM batteries. It has been adjusted to the numbers stated in the manual at the factory. If you move the switch to the other position, it will just pump out a certain voltage. What is that voltage? Anywhere you have set it at, from 13-16.5V.
I played with this and I believe mine is now set at 14v at the fixed position, but I certainly may have adjusted it to 13.8v. Too lazy to check. I'm still trying to find what works for me. I am also going to install another 302ah battery. I will probably settle on a 3.40v full cell reading when I am done but I am not done yet. When you adjust the voltage, it does not stray.
Here is something that I think it's clear about, but maybe I am wrong. There is one switch that will turn it to a multiple stage charge or a fixed output voltage. The other 'switch' [which is more of a rheostat vs switch], adjusts the voltage [13V-16.5V]. It will adjust the multiple stage voltage AND the fixed stage voltage. So, if you play with this and expect it to go back to factory standards, it does not. You will also need to adjust it back to the factory standard voltage if 14.6V.
So, not only can you adjust the constant voltage but ALSO the multi-stage voltage. I can only say, on the fixed voltage adjustment, it is pretty darn constant. It seems like load does not matter, it will pump out the voltage you set it at. Up to the current it can produce. I have seen this converter charge two very low 304ah batteries up to full in less than 6 hours.
I did up size the circuit breaker to 20A because the 15A would trip if the converter is full tilt for 30-45 mins. After the 20A breaker install, it does not trip anymore. The control panel was already rated to 20A so it just took a breaker to make me happy. I never checked the actual current, I loaded my parts cannon and so far, it seemed to work. I would probably not follow my lead on that, without some research.
The cooling fan does come on after a few minutes of charging. With large capacity lithium batteries, each of mine are capable of sucking 250A per hour for a fast charge and 150A for a standard charge. So, the converter rarely sits at idle. It can, once the batteries are fully charged. If they are ever ever taking a charge, the converter is putting out max [+95A] and the fan comes on. I'm guessing after 10-15 minutes of that much load. It's not loud, but mine is in the basement, not in the control panel.
There is not a FLA/Lithium switch.Last edited by Butcher; 11-29-2022 at 09:10 PM.
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11-30-2022, 06:28 AM #18
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- Thunder Bay, Ontario, Canada
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@Butcher Thanks for the explanation
2018 Dodge 3500 6.7 Cummins SRW w/Aisin
2021 Reflection 303RLS
New to RV'ing since 1997
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11-30-2022, 08:06 AM #19
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- Oct 2020
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- Southern Arizona
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Just as an FYI, my convertor was replaced under warranty, and they installed a WFCO 8950L2-MBA (lithium only). It charges in bulk mode from one to four hours (as needed) before entering absorption mode. I am glad I do not have an auto detect version. I do not need a switchable convertor as I went totally lithium.
Mike & (RIP Karen)
2021 Imagine 2600RB
2011 Toyota Tundra 5.7 RW, Tow Package
Husky Centerline WDH
Champion 2500DF, Prodigy P2
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12-03-2022, 10:49 AM #20
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- Oct 2022
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- CO
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Dragonfly recommended the Powermax 120A converter/charger for my 550aH battery pack and I love it. Moved the charger to the front compartment for more efficient charging.
40+ Year Camping Enthusiast--Living in CO
2022 GMC Sierra 3500 AT4 CC-LB D-Max Payload 3865#--- 5000 Air Springs w/Wireless Comp
2022 GD Reflection 303RLS-- 565 watts of solar/560aH of LIPO4 batteries, 2000w inverter,
DC Starllink- Comfort Ride Shock System and Lippert Air Pin Box
pulling a GD 22MLE?
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