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Open Roads Forum  >  Tech Issues

 > Wfco amp test.. What are you pendant guys getting?

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lawrosa

Howell NJ

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Joined: 10/06/2013

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Posted: 10/10/17 02:07pm Link  |  Quote  |  Print  |  Notify Moderator

So the Wfco is known to not go into bulk mode.. I think this may be mis information I am not sure. On a phone call to wfco I spoke to a tech there, and he stated you may never see the 14.4 ( why they advertise this IDK)

But high amps low voltage is how it works per our discussion..

So running down the batts to 12.2 volts or so I flipped the breaker on the charge circuit and did some readings..

I have 15 ft # 6 wire from batts to wfco..

Start 12.2 volts.
two 75 ah grp 24's. ( I have a 3rd I put on line sometimes but this test was with the two only)

1.
32 amps to batts
13.59 volts @ converter ( charge wire)
13 volts @ batts

2.
15 minutes later
24.9 amps
13.65 @ conv
13 v @ batts

3.
35 minutes later
24.2amps
13.66 volts @conv
13.2 @ batts

4.
48 minutes
22.9 amps
13.67 @ conv
13.2 @ batts


5.
1 hr 20 minutes later
19.6 amps
13.68 @ conv
13.3 @ batts

6.
1hr 48 min
13.1 amps
13.68 @ conv
13.4 @ batts

7.
2 hrs 20 min
11.8 amps
[email protected] conv
13.4 v @ batts

8.
3 hrs
8.1 amps
13.7 volts @ conv
13.5 v @ batts


So I never saw the 14.4 and I guess thats not how this converter works. It did keep a constant amps for the first hour or so. ( This was the 24 amps I saw. Thats consistent with a bulk charge as I know it I guess.)

I mean would I gain anything by upgrading the lower end of the wfco to a unit that has the pendant, or is more transparent with this 14.4 volts everyone online talk about? I mean I understand it as I have solar, and charge in bulk @ 14.7 volts, and absorb at 14.5 for how ever long it was in bulk.. But my solar controller is only a 20 amp model. I do see 15 amps on sunny days.. But it will stay in bulk at a constant amps and not taper untill the 14.7 volts is reached.

Something to consider is on the coachmens there is a 30 amp breaker/resettable on the #6 wire under the camper. Upon putting a load on my inverter thinking I could get a 14.4 reading at the wfco, the wfco started dumping 40 plus amps to the batts.. Well the breaker kept doing an on/off thing until I removed that load..

So even though you all may have 55 amp converters, its not going to get through that breaker for long.. Im going to up that breaker to a 40 or 50 amp model..



Well thats where I am at... So I dont know what to do.. As I boon dock I want to charge on generator as fast as I can. I dont want to waste 200 buck upgrading the lower end to achieve the same results.

150 ah @ c/20 is 30 amps..
Add 3rd batt and 220 ah @ c/20 is 44 amps bulk.

I rely on the solar but I was in a shaded boondock area and only had 2 hours of sun, before the trees blocked it.

Upon starting the gen I ran it for 3 hours. I also ran the a/c and a TV. That was probably 20 amps, but the wfco should of supplied the 20 or 30 to charge the batts.

So the amps were pretty constant for the first hour or so..

I would like to know what the pendant guys get at the 14.4 volts in regards to amps.. And where do you see this 14.4 volts when your charging?

My wfco read 13.5 start and 13.7 at the end of my 3 hour test. ( but the amps were there)

On a side note too I tested the amps from the trucks 7 pin and voltages. I only did this for a brief 10 min test when the camper batts were @ 12.2 volts..

truck 7 pin.

15 amps
14.5 volts @ 7 pin
13v @ batts

Maybe ill do a test with just the truck tomorrow...


Mike L ... N.J.

2006 Silverado ext cab long bed. 3:42 rear. LM7 5.3 motor. 300 hp 350 ft lbs torgue @ 4000 rpms
2018 coachmen Catalina sbx 261bh


SidecarFlip

SE Michigan

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Joined: 10/09/2016

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Posted: 10/10/17 02:19pm Link  |  Quote  |  Print  |  Notify Moderator

You mean someone there speaks English? I'm amazed.


2015 Backpack SS1500
1997 Ford 7.3 OBS 4x4 CC LB

lawrosa

Howell NJ

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Posted: 10/10/17 02:38pm Link  |  Quote  |  Print  |  Notify Moderator

So I upgraded the breaker under the camper to a 40 amp model.. I ran the batts down and did another test with the wfco.. I was able to crank 60 amps out of that thing... wow.

This was running batts down to 12.2 and first turning on converter..

I did have a small load on the batts to see how high I could get it without tripping the new 40 amp breaker..

[image]

With that said and load off it held the amps pretty good once it settled in at 40 amps or so..

[image]

Upont my testing also I tried plugging the truck in. I would get an additional 10 amps or so from truck to add to the wfco amps..

Here it shows 50 amps with truck idling and wfco.

[image]


Two hours exactly of this from 12.2 batts ( truck and wfco) I produced a hydrometer reading of. 1265. I was down to 15 amps charge rate and batt voltage at 13.5 -13.6..

[image]

So If voltage lowers for amps this wfco may be at the 14.4 volts but will not show it anywhere.. Im getting the amps..

So as stated I wonder what amps the pendant guys are getting...

lawrosa

Howell NJ

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Joined: 10/06/2013

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Posted: 10/10/17 02:41pm Link  |  Quote  |  Print  |  Notify Moderator

SidecarFlip wrote:

You mean someone there speaks English? I'm amazed.


Yes I spoke with john an 8 year veteran there. He said how the wfco is misunderstood and explained its operation to me.

They are in Indiana or Illinois I believe..

* This post was edited 10/10/17 03:26pm by lawrosa *

MrWizard

Traveling

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Posted: 10/10/17 04:27pm Link  |  Quote  |  Print  |  Notify Moderator

never saw a wfco with pendant

i had a wfco deck mount with 'boost button' on the face of the deck mount

it worked,

i overheated and fried the wfco, but it was my fault

i was on shore power, and plugged and electric heater into inverter feed outlet
inverter running 1200w heater, wfco trying to supply inverter and batteries


Radiate The Happy
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shastagary

minnesota

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Joined: 07/16/2007

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Posted: 10/10/17 04:41pm Link  |  Quote  |  Print  |  Notify Moderator

if you haven't found the thread on modifying the wfco to force the converter into boost mode. this is one of them. how to force the converter into boost mode

lawrosa

Howell NJ

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Joined: 10/06/2013

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Posted: 10/10/17 04:50pm Link  |  Quote  |  Print  |  Notify Moderator

MrWizard wrote:

never saw a wfco with pendant

i had a wfco deck mount with 'boost button' on the face of the deck mount

it worked,

i overheated and fried the wfco, but it was my fault

i was on shore power, and plugged and electric heater into inverter feed outlet
inverter running 1200w heater, wfco trying to supply inverter and batteries


No.. I know I dont have the pendant.. The wfco is going into boost mode IMO..

Im getting 40 amps of so..

What im wondering is what amps are the guys with the pendants getting on thier PD brand converters..

I ask because I too may of drank the cool aid to upgrade my wfco converter when its totally un neccessry..

The wfco seems to work as designed and why waste $200 upgrading just so I can see 14.4 volts with my tester.. ( Do any on the pendant guys actually see 14.4 volts?)

Its my assumption the wfco holds amps longer and the PD's taper too quick... Seems the wfco will always win...

* This post was edited 10/10/17 05:14pm by lawrosa *

lawrosa

Howell NJ

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Joined: 10/06/2013

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Posted: 10/10/17 04:52pm Link  |  Quote  |  Print  |  Notify Moderator

shastagary wrote:

if you haven't found the thread on modifying the wfco to force the converter into boost mode. this is one of them. how to force the converter into boost mode


I read that..Something Im not going to attempt because of the misconception on what boost mode actually is doing...

Old-Biscuit

Verde Valley

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Joined: 06/20/2009

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Posted: 10/10/17 05:31pm Link  |  Quote  |  Print  |  Notify Moderator

55A rating does NOT mean charger section will push 55A to batteries.

55A rating is the Converter Load capability rating......charging section AND DC Supply for dist panel


Is it time for your medication or mine?


2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
On the Road Debt Free April '07
Off the road still Debt Free Jan. '14

lawrosa

Howell NJ

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Joined: 10/06/2013

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Posted: 10/10/17 06:05pm Link  |  Quote  |  Print  |  Notify Moderator

Old-Biscuit wrote:

55A rating does NOT mean charger section will push 55A to batteries.

55A rating is the Converter Load capability rating......charging section AND DC Supply for dist panel


What I know is you can get full rated amps to batts. As my amp meter shows me pushing 60 amps through. That was with small load on inverter as I stated. I did that to test the new inline 40 amp breaker I replaced . ( it was 30 amp previous and would trip out at 40 amps or so during my tests)

During the tests I ran 120 volts loads such as a/c and refeer with no amp drop.

I believe if I ran DC loads, the heat blower and water pump the amps would go down from whats going in the batts.. I may try that tomorrow while I have the amp meter.

But what major DC loads are really in the camper? 7 amps on heater, and maybe 4 - 5 on water pump? So its irrelevant IMO if you can still get 30 amps.

c/20 charge rate per dekka..

220 ... 20% = 44 amps

Or just my two batts 150 ah + 20 % = 30 amps..

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