Mean Well power supply for my usage

jrnymn7 wrote:

Snowman9000 wrote:
To answers some of the questions and points raised:

-No equalization needed from this charger.
-120v current is a 15A dedicated circuit.
-Concerned about the notorious PD underperformance on Onan electricity. Will going to the 60A take care of that?
-Doesn't the Mean Well taper amps according to battery acceptance? Or does it keep pushing 40A, and the voltage runs wild?

AFAIK, all psu's are constant current, constant voltage, meaning; just like a so-called smart charger, when charging begins the current will hold steady, in constant current mode, at the units set limit (called current limiting), the volts will rise to your voltage setting, at which point the unit will switch to constant voltage mode, and the amps will indeed taper. All a 3 stage "smart" charger is, is a psu with preset (factory) limits, and an additional float mode.

The psu will have a max POWER output, i.e; 600 watts, which is a product of volts and amps, as I'm sure you probably know. If for instance, the psu is 600w and has a range of say 12-15v, and is rated for a max of 40a, then it would put out little more than 40a regardless of a lower voltage setting.

600w / 12v = 50a, but the psu has a limit as to its max.current out put.

And as with any charging source, the batts will have the final say when it comes to how many amps they will accept; realizing, of course, a higher voltage will accommodate higher amps throughout the charge cycle, until the batts amp reading levels out (becomes static) once full.

That's what I thought. It sounds perfect to me. Basically a charger that does a good job at bulk and absorption, with no ability to float at a lower voltage. For two hours on a genset, is there anything that can go wrong?

Sorry, I'm not familiar with the issue concerning onan and pd?

Just as well. No need to derail the thread, I probably should not have brought it up. Basically though, the PD converter sees the waveform of the Onan genset as a relatively low AC voltage. And that reduces the output of the PD in that situation. I think the common wisdom is to go up one size in the PD lineup, and that should make up for it. For the reasonable price of the PD9260, if it will pump 40A for at least two hours (assuming the batts can accept) while trying to hit 14.4v, on the Onan, I'd probably just go that route.

Snowman9000 wrote:
To answers some of the questions and points raised:

-No equalization needed from this charger.
-120v current is a 15A dedicated circuit.
-Concerned about the notorious PD underperformance on Onan electricity. Will going to the 60A take care of that?
-Doesn't the Mean Well taper amps according to battery acceptance? Or does it keep pushing 40A, and the voltage runs wild?

AFAIK, all psu's are constant current, constant voltage, meaning; just like a so-called smart charger, when charging begins, the current will hold steady, in constant current mode, at the units set limit (called current limiting), the volts will rise to your voltage setting, at which point the unit will switch to constant voltage mode, and the amps will indeed taper. All a 3 stage "smart" charger is, is a psu with preset (factory) limits, and an additional float mode.

The psu will have a max POWER output, i.e; 600 watts, which is a product of volts and amps, as I'm sure you probably know. If for instance, the psu is 600w and has a range of say 12-15v, and is rated for a max of 40a, then it would put out little more than 40a regardless of a lower voltage setting.

600w / 12v = 50a, but the psu has a limit as to its max.current out put.

And as with any charging source, the batts will have the final say when it comes to how many amps they will accept; realizing, of course, a higher voltage will accommodate higher amps throughout the charge cycle, until the batts amp reading levels out (becomes static) once full.


Sorry, I'm not familiar with the issue concerning onan and pd? But what I do know is agm batteries can handle pretty much anything you throw at them, amperage wise. Just keep a close eye on the charging voltages.

http://www.powerstream.com/SLA-fast-charge.htm

To answers some of the questions and points raised:

-No equalization needed from this charger.
-120v current is a 15A dedicated circuit.
-Concerned about the notorious PD underperformance on Onan electricity. Will going to the 60A take care of that?
-Doesn't the Mean Well taper amps according to battery acceptance? Or does it keep pushing 40A, and the voltage runs wild?

The rsp-500-15 and 750-15 have current limiting protection. I forget what Landyacht paid for his 500? I think about $130 shipped? The 750's are closer to $200.

With two group 27's you could go with a Progressive Dynamics 9260 (the proper size) and then you would have a "Set it and forget it" setup.

Or for roughly the same cost a pair of GC-2 (Six volt golf car batteires in series) alas PDI does not make a 9270 (the proper size for those) but they would give you another 20-40 amp hours and they are TRUE DEEP CYCLE not marine deep cycle so when you run 'em down farther than planned they do a better job of recovery.

According to the Jameco website, this model does not have "current limiting" overload protection:

http://www.jameco.com/Jameco/Products/ProdDS/291522.pdf

There was some discussion among the experts as to whether "shutdown on overload" would work for maximum amp charging.

The Jameco website has a whole list of meanwell chargers and you're certain to find the right one, but it will take some searching.

Don't really know what you working on but IMO you would get a much better re-charge of your two GP-27 batteries by running your on-board smart mode converter/charger from your generator.

Your two GP-27 batteries would then go thru their 14.4VDC Boost charger for two hours followed by an additional 13.6VDC Normal charge for another one hour period to safely finish the 90% charge state.

Running a continuous high DC charge Voltage for manual extended time periods you will run the risk of boiling out your battery fluids which will do harm to the batteries... This is where smart mode charging techniques really keeps your batteries in their best performance duty cycles.

Roy Ken

If you only plan to us it for bulk and abs, I suggest you consider the mega watt s-400-12. It has a lower voltage range than the mean wells, but dollar for dollar it offers good value in the way of amps.

$60 mega watt vs $85 mean well

otoh, if you plan to EQ your batts occasionally, you would be best to go with the mean well 600-15 and its 16.5v range.

Keep in mind, however, you will have no control over current, in either case.

http://www.12voltpowersupplies.us/

http://www.meanwell.com/search/se-600/SE-600-spec.pdf

Not sure if 120v input current draw is an issue for you? That could affect your decision, as well.

Note: If your batteries are AGM, the mega watt will have more than a sufficient voltage range for all your needs. And AGM's can handle a lot of current during boost and abs, so an even higher amp charger would cut down on gen time considerably. The best price I have found on an adjustable voltage (higher amp) PSU is the Turnigy 1080w 60 amper, at about $130 u.s. And it has 4 outputs, so at least some control over output current. Mine just arrived today, and it appears to be well built. I will be giving it a go in a few days, and will report the results.

RESULTS: she's a no good! over current protection kicks in at power on.