Why do my amps stop dropping ?

[Mobilesport]

System 
HONDA 2000
2 SAMSCLUB GC2 GOLF batteries
Meanwell rsp-500-15
4ft of 4 gage wire

When charging everything was going ok until the amps got down to 22 amps and then the amps quit dropping,,,, a hour later the reading is still 22 amps , I'm trying to get down to maybe 5 amps.

 

[SternWake]

System 
HONDA 2000
2 SAMSCLUB GC2 GOLF batteries
Meanwell rsp-500-15
4ft of 4 gage wire

When charging everything was going ok until the amps got down to 22 amps and then the amps quit dropping,,,, a hour later the reading is still 22 amps , I'm trying to get down to maybe 5 amps.

Do you have any DC loads on the batteries?  If so then the location of your clampmeter will show both amps into battery and amps into loads.

The clamp meters can get confused with electrical noise, it is better to measure further away from noise generators such as the Meanwell and other electronics.

Right near the battery terminal, over the (-) with the wire centered in middle of clamp would likely give more accurate readings of amps into batteries.

You dipping a hydrometer when holding those 14.8v?

Sulfated batteries will require more time at, and more amperage to be held at 14.8v before specific gravity climbs into 1.275+ range. but 22 amps seems very excessive.

The meanwell would prefer those additional fans blow air into the front of the unit as the strong 40MM fan it comes with sucks air out of its interior.

Those recesses in the sides of the meanwell are where the major transformers generating heat are, It appears your angle brackets are occluding these areas from airflow to some degree.

 

[Mobilesport]

The only dc load I have on during charging Is a small .15 amp l.e.d.light.

Fan is powered from 110 AC during charging

I'm working on a better fan setup.

The 4 gage cables go from meanwell directly to batteries , nothing else is wired to those cables

I'll try connecting my clamp meter at the neg battery cable close to the battery , thanks for the advice. 

No Hydrometer .

Your correct about my L brackets  , they were hot to the touch , I didn't notice the recessed sides , thanks for pointing that out , I noticed that you installed heat sinks , good idea.

Redesigning my L backets are in the works. 

Thanks for the help...

 

[SternWake]

The only dc load I have on during charging Is a small .15 amp l.e.d.light.

Fan is powered from 110 AC during charging

I'm working on a better fan setup.

The 4 gage cables go from meanwell directly to batteries , nothing else is wired to those cables

I'll try connecting my clamp meter at the neg battery cable close to the battery , thanks for the advice. 

No Hydrometer .

Your correct about my L brackets  , they were hot to the touch , I didn't notice the recessed sides , thanks for pointing that out , I noticed that you installed heat sinks , good idea.

Redesigning my L backets are in the works. 

Thanks for the help...

IIf these batteries have not been fully charged for a while then the 22 amp might take some time to taper to 5 amps and perhaps never.

It really is best to dip the hydrometer and see where the specific gravity is. If well below 1.270m then keep the Meanwell going.  If the batteries are barely bubbling, bump up the voltage to 14.9v and recheck. 

https://www.amazon.com/OTC-4619-Professional-Battery-Hydrometer/dp/B0050SFVHO

The temperature compensation is great to have, as electrolyte warms during charging and will make it appear as if SG has stopped rising, but with temp comp it is still rising, and the center cells warm more than the outer cells.

If amps ever get in the ~12 range at 14.9v for those 2 GC-2 batteries, then you could try the 16 volt EQ charge to attempt to restore lost capacity,

Take note of battery temperatures when holding voltage this high for a period of time.  

I know you are on the replace batteries whenever needed method, but a full recharge and an EQ charge after that can make it so the batteries can accept the MeanWell's 40 amps for longer on subsequent recharges, and if so, meaning shorter generator run times to return more juice into the batteries.  Less fuel burned for a higher state of charge when you turn off the  generator.

Sulfated batteries more quickly rise to absorption voltage, at which point the amps taper, So dissolving the sulfation can increase recharge efficiency to they can accept higher currents for longer and recharge more in the duration at which you run the generator and meanwell.