Which one puts out the most amperage? What does the Mega generate?Normal charging amperage. Say, with the voltage set to 14.8 with low batteries...

Nothing exciting. Had my Arduino fired up yesterday and took this plot.

I've posted the capabilites of my Meanwell rsp 500-15 Previously. Im on the road. Have not plugged in to 120 vac for 3+ weeks. Perhaps in 8 or 10 more days. Alternator and solar have been plenty but the screwy 31 is no longer thumping it chest and doing tarzan yells.It is however easily meeting my overnight needs. But morning voltages are not impressive. Right now 8:30 at night 11 ah from full 3.1 amp load. 12.4volts.

You better be more specific as to which MeanWell voltage and Model number being compared to the 2 Megawatt models we know of.I've seen my MegaWatt put out 40 amps, its only a 30 amp model, but that is only right when you turn the unit on, the shunt was pretty cold that morning, don't know if it was an accurate figure. Once my Mega Watt settles in, it seems to hold 33 to 29 amps, no problem, for a while. It's pretty rare for me to get my T-1275 down to 50% SOC, since I charge up daily and I'm not burning much amps, 35 -45 AH in 24 hours. I would bet that if hooked up to T-105's, at least a pair, 30 amps, no problem.Maybe Mena661 will post up, but he has his on some big batteries, and uses his for maintenance charging, I think, not bulk charging?

No bulk charging yet with mine. 24A tops and fast tapering with some destratification charging is pretty much it. I haven't done much camping, let alone boondocking this year to see what it does on lower SOC's.

mena661 wrote:No bulk charging yet with mine. 24A tops and fast tapering with some destratification charging is pretty much it. I haven't done much camping, let alone boondocking this year to see what it does on lower SOC's.What do you have the voltage set at on your Mega Watt, and is it the 30 amp or 36 amp model?

Shootout! Meanwell vs. Megawatt ? | Good Sam Community

mena661
Explorer
Nov 13, 2014
Thanks Niner for the confirmation. Good info to know.
NinerBikes
Explorer
Nov 10, 2014
NinerBikes wrote:
mena661 wrote:
Ok, DW and I went out for a last minute day trip in the MH. All boondocking. Bank was only down 14Ah total. Got home, adjusted MegaWatt to 14.7V (it tends to rise a tenth) and let her rip. Amps went up to 36.4 and hung out there for a few minutes then tapered to 29. No weird noises or other signs of protest.

This pretty much matches what I saw when the temps I was charging up at were in the 80's to 90's F. For some reason, firing up the Mega Watt S350-12 in 17F temps really ramped the amps up briefly to 40 amps. It was coming down about an amp a second or two in the first 10 to 15 seconds and locks on and steadies at 29 amps. BTW, that is the only time I've seen my Honda EU2000i smoke steam, and continue to do so, even after warmed up 3 or 4 minutes. Perhaps a lot of water in the fuel, or methanol?

This was on a single T-1275, don't know if a C5 charge rate is hard on this battery, Mexwan has suggested that it's best to not whomp on the amp charge rate too hard on this battery, due to it's construction and poor acid to plate ratio, due to it's shape and size.
NinerBikes
Explorer
Nov 10, 2014
mena661 wrote:
Ok, DW and I went out for a last minute day trip in the MH. All boondocking. Bank was only down 14Ah total. Got home, adjusted MegaWatt to 14.7V (it tends to rise a tenth) and let her rip. Amps went up to 36.4 and hung out there for a few minutes then tapered to 29. No weird noises or other signs of protest.

This pretty much matches what I saw when the temps I was charging up at were in the 80's to 90's F. For some reason, firing up the Mega Watt S350-12 in 17F temps really ramped the amps up briefly to 40 amps. It was coming down about an amp a second or two in the first 10 to 15 seconds and locks on and steadies at 29 amps.

This was on a single T-1275, don't know if a C5 charge rate is hard on this battery, Mexwan has suggested that it's best to not whomp on the amp charge rate too hard on this battery, due to it's construction and poor acid to plate ratio, due to it's shape and size.
mena661
Explorer
Nov 09, 2014
Ok, DW and I went out for a last minute day trip in the MH. All boondocking. Bank was only down 14Ah total. Got home, adjusted MegaWatt to 14.7V (it tends to rise a tenth) and let her rip. Amps went up to 36.4 and hung out there for a few minutes then tapered to 29. No weird noises or other signs of protest.
mena661
Explorer
Nov 09, 2014
NinerBikes wrote:

What do you have the voltage set at on your Mega Watt, and is it the 30 amp or 36 amp model?
Mine is the 30A and I have it set at 13.65V.
jrnymn7
Explorer
Nov 09, 2014
Has anyone tried paralleling either a pair of mean wells or mega watts?

I know some of the mean wells are constant current limited protected, but are the mega watts as well?
MEXICOWANDERER
Explorer
Nov 08, 2014
AC power sagged to 22 volts a couple days ago. Blew some lithium and NiMH chargers. The cheapo and the WFCO shrugged it off. The Lifeline and Samlex did their job and it was only after the transformer rectified Endless Breeze started spinning at 30 RPM did I notice the burnt-umber-outage was underway.

I've been doing scans on the open-chassis WFCO with an IR. No way in hell in the OEM fan going to keep an enclosed WFCO cool enough for my taste. Second fan gets added tomorrow.

Stupid crippled left hand stops me from soldering-in swapping genuine 10-turn cermet pots in place of the .00002 cent OEM cheapo pots. Gotta find an electronics place that I trust to do the job right. Need to find some 1/4"X20 1/2" screws for the rectifier. Poco a poco. I am playing jump-rope with a new-to-me Galaxy phone. It's winning.
landyacht318
Explorer
Nov 08, 2014
We need a franken borg charger thread mex.
MEXICOWANDERER
Explorer
Nov 07, 2014
The Cheapo when plugged in charges the caps because it has no switch on the AC.
NinerBikes
Explorer
Nov 07, 2014
jrnymn7 wrote:
I'd like to compile a list of AC line start-up currents on the various units, for matching up to smaller generators, as well as their max amp outputs.

I can tell you that the 30 amp Mega Watt, when first turned on on a Honda Eu1000i, at 7000 feet, with non ethanol fuel, is going to run that 1000 a bit hard the first 3 or 4 minutes, so make sure the generator is warmed up well before you flip on the switch on the Mega Watt, cause the motor is going to get a bit of a bark to it for maybe 5 minutes or so.

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