Battery Equilization PS Current Requirement
What power supply current capacity would be required to equalize a single Trojan SCS 200 (Gr 27) 12V battery @ recommended 16.1 VDC?
Forum Discussion
After a prolonged absorption charge, The 12v flooded screwy31(130AH new) required 6.2 amps to nearly instantly be brought upto 16v, and this would taper to the 4.2amp range just about the time the Specific gravity maxed out.
My meanwell rsp-500-15, rated for 500 watts, is capable of over 600.
Its internal fan is LOUD.
Previous to my acquiring the Meanwell, I had the 23$ Etopxizu 30 amp power supply. It would do 38 amps with voltage cranked up into a deplted battery, but over 36 amps made a noise indicating it was not happy. It clearly lacked overamperage protections. I believe it maxed out at around 15.5v unloaded, but do not recall for sure.
There are so many similar looking power cheap power supplies on amazon and Ebay, and many will claim overcurrent and overvoltage protections, but those are just words without meaning unless verified.
If I turned the voltage down on the cheapowatt faster than the battery would naturally bleed off voltage, the etopxizu cheapowatt made a hideous whining sound. There is a long thread if one wants to search the terms Etop cheapowatt
If I do the same to my Meanwell there is an Audible click and amp output goes to zero until battery voltage falls to where i have set my dial.
I think one has to be suspicious of the ventilation and heatsinking of all these power supplies. I cut holes in my lid for 60mm intake and 80MM exhaust fans, and now the extremely loud and powerful 40MM fan only comes on over 32 amps output and when over 65F ambient temp and the highest temp I have seen on a thermocouple epoxied to an internal heatsink is 118f.
There are a few Meanwells like the SE-350 which have constant current limiting on overload, and these can be had in the 50$ range. The PS's to avoid are those with rollback or hiccup current limiting on overload.
My meanwell rsp-500-15, rated for 500 watts, is capable of over 600.
Its internal fan is LOUD.
Previous to my acquiring the Meanwell, I had the 23$ Etopxizu 30 amp power supply. It would do 38 amps with voltage cranked up into a deplted battery, but over 36 amps made a noise indicating it was not happy. It clearly lacked overamperage protections. I believe it maxed out at around 15.5v unloaded, but do not recall for sure.
There are so many similar looking power cheap power supplies on amazon and Ebay, and many will claim overcurrent and overvoltage protections, but those are just words without meaning unless verified.
If I turned the voltage down on the cheapowatt faster than the battery would naturally bleed off voltage, the etopxizu cheapowatt made a hideous whining sound. There is a long thread if one wants to search the terms Etop cheapowatt
If I do the same to my Meanwell there is an Audible click and amp output goes to zero until battery voltage falls to where i have set my dial.
I think one has to be suspicious of the ventilation and heatsinking of all these power supplies. I cut holes in my lid for 60mm intake and 80MM exhaust fans, and now the extremely loud and powerful 40MM fan only comes on over 32 amps output and when over 65F ambient temp and the highest temp I have seen on a thermocouple epoxied to an internal heatsink is 118f.
There are a few Meanwells like the SE-350 which have constant current limiting on overload, and these can be had in the 50$ range. The PS's to avoid are those with rollback or hiccup current limiting on overload.
