Daddy Tanuki
Emperor Of Solar
fat chance Bro... my wallet always screaming at me and my stupid ideas.
Best 48V AC-DC Charger?
- Thread starter Over9000
- Start date
Wolfpack7483
Solar Enthusiast
I ended up finding a Mean Well RSP-1000 at a reasonable price on ebay. I think it matches my generator well, v is adjustable to 55v, and can also take DC as an input (127~370v dc), so I can connect directly to solar if I want to tinker with it.
yabert
Solar Addict
Yes, those are awesome. I've play with 1 and 2 kW model in the past.I've also connect another meanwell model to a 165Vdc array and that work.
Over9000
3rd Shift Ass. Manager @ 2nd-Hand Adult Toy Store
How about this:
mastechpowersupply.com
60V 20A Switching DC Power Supply 1200W - Best Deals on Mastech Variable DC Power Supply
High-quality, stable, and powerful switching DC power supply with 1200W max power. Continuously adjustable voltage and current outputs from 0-60V DC and 0-20A.Buy now! - Guaranteed best price for Mastech Power Supply, regulated variable DC power supply, linear DC power supply and switch mode DC...
wpns
Solar Joules are catch and release
That’s a nice bench supply and will definitely meet your stated use criteria.How about this:
60V 20A Switching DC Power Supply 1200W - Best Deals on Mastech Variable DC Power Supply
High-quality, stable, and powerful switching DC power supply with 1200W max power. Continuously adjustable voltage and current outputs from 0-60V DC and 0-20A.Buy now! - Guaranteed best price for Mastech Power Supply, regulated variable DC power supply, linear DC power supply and switch mode DC...
Jmhai3
Solar Enthusiast
All this discussion of the different brands, Mean Well, Chargeverter, Mastech, and others my question is do they all do the same thing the Chargeverter is needed for.
Take modified or "dirty" power and convert it to "clean" Pure sine wave form?
Take modified or "dirty" power and convert it to "clean" Pure sine wave form?
wpns
Solar Joules are catch and release
Well, yes, plus or minus the details. And the UI. And the specs. And the prices. And potentially other battery-charger-specific features.
Well, the CV doesn't convert anything to a pure sine wave, all the above and the CV are battery chargers, converting a wide range of power input to DC at a particular voltage with a settable current limit.
Jmhai3
Solar Enthusiast
With this info I should be able to plug my Drok 60v power supply into (example) Craftsman's open frame 6000watt "non-inverter" generator and charge 48v lifepo4 server rack batteries safely?
I have a small inverter generator that has continuously worked well thru my EG4-3k and charge the batteries just want to have a backup plan if the little invertor goes down and have to rely on the old Craftsman.
This is from the SS website and only reason I would need with my small system.
Protection from "Dirty Power":
- Guards against unreliable sine waves from lower-budget generators
- Protects inverters from power quality issues
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Wolfpack7483
Solar Enthusiast
I got my Mean Well for less than 20% of that cost, with free shipping, for essentially the same wattage when you take into account the continuous overload factor. Granted, it's used, but it's built for industrial applications, and has an extremely high MTBF rating.
https://www.ebay.com/itm/156818215382
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Jmhai3
Solar Enthusiast
I see the screw potentiometer on the front is that how one would adjust the voltage to max 55v?
See no knobs or other adjustment method.
wpns
Solar Joules are catch and release
That’s the one, though it may be a (mostly) full turn from min to max, so may not be adjustable by normal humans to the mV. Also readouts and current limiting are missing if you care about those features.
Over9000
3rd Shift Ass. Manager @ 2nd-Hand Adult Toy Store
Bought it!
Jmhai3
Solar Enthusiast
Yes, My DROK looks similar to the mean well in design except mine has two knobs and a readout for volts and amps.
Did you see my question on would the DROK be able to plug into the Craftsman "non-inverter" generator and export/charge my 48v batteries with pure sine wave voltage?
Is pure sine wave needed if directly charging the batteries? I assume yes since the electronics (BMS and such) are probably sensitive to Hz coming in.
How sensitive are the cells themselves to changing Hz?
wpns
Solar Joules are catch and release
I have a DROK with separate displays and multi-turn knobs, and it's horribly inaccurate, especially the ammeter at low currents, prone to boil my FLA batteries dry. I'd replace it with a decent bench supply if it weren't for the sunk costs of the DROK and the low priority of the 'proper' one.
Yes. Did you see my response at https://diysolarforum.com/threads/best-48v-ac-dc-charger.102006/post-1394192 ?
I don't think that means what you think it means, please revisit your terminology and/or expectations for DC POWER SUPPLIES.
Not at all.
Jmhai3
Solar Enthusiast
I have separate chargers for all the other batteries (types) and the server racks when in use. The Drok was only for the 48v server rack batteries to balance them before putting in service and haven't used since, it just sits unless I buy another battery which I have no plans anytime soon. I also verified what was going into the batteries with the battery software communication (laptop) and a meter.
I see that response, but I must be asking my question incorrectly like you mentioned the terminology/how I'm asking is wrong.
The recommendation for running sensitive electronics is to use AC grid power, a gas "inverter" generator, or battery/solar/hydro/wind into EG4 inverter for an example. It produces a set voltage and Pure Sine Wave form which is measured as Hertz. (Hz) is the unit of measurement used to measure the frequency of alternating current (AC) in electricity?
A non-inverter generator produces a pure sine wave form, but could be dirty (also could be high fluctuation of voltage but sine wave seems to be the reason most given) and can damage sensitive electronics?
I plug the CV into an inverter or non-inverter generator, and it takes AC 120/240 voltage (pure or dirty sine wave) and converts/charges the batteries with DC.
I plug the Drok into the house outlet (AC) and charge the battery with DC.
Can I do the same with an "inverter" generator? I assume yes, because it is producing AC current similar to my house current (Pure Sine Wave).
Can I plug the Drok (or any 48-volt charger excluding the CV) into a "non-inverter" generator, will it damage the Drok, or will it charge the batteries just the same by converting to DC?
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cs1234
Solar Wizard
- Joined
- May 9, 2022
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Maybe. Some devices are built with greater tolerances for bad wave forms and fluctuating voltages/frequency. Try it and let us know.
Wolfpack7483
Solar Enthusiast
The cells are being charged with DC, so ac input won't matter.
Jmhai3
Solar Enthusiast
I see where I made a mistake in the question too.
The Drok was what I should have asked being sensitive to the Hz not the battery. I was thinking too far ahead in that damage to the Drok would damage the BMS in the battery but can see I was wrong.
Jmhai3
Solar Enthusiast
I might just try it. I planned to replace with a better unit down the road. I'm always trying to have more than one way to do something. Two generators (one inverter-one non), propane back-up heater if oil furnace goes down, and regular cable with Starlink on hold to name a few.
After the hurricane (Helene) I did plug my small solar generator (BougeRv unit-it uses a charger block for AC charging) into the non-inverter craftsman generator and it made the power block LED turn red, and it alarmed the solar generator. It did not like the power coming from the craftsman.
Switched back to solar only, it was slow as it only has two 100 watt folding panels.
Wolfpack7483
Solar Enthusiast
If it's like the one below, it doesn't appear to be very sensitive to input voltage or frequency. I know the Mean Well takes DC input as well.
Jmhai3
Solar Enthusiast
Pretty much the same thing. Worked fine for what I needed and when I bought it was $60 dollars.
wpns
Solar Joules are catch and release
Looks like the one I got as well:
Horribly inaccurate, especially at low currents. I should have gotten a proper bench supply for 60V.
A little bit of a thread jack, but I've used several of these Drok (and other brand supplies) adjustable DC power supplies/AC converters with good results. (I use a few different bench supplies when I'm doing fine work, not just shoving bulk energy in.) I just started using one a buddy had given up on, and it is sending out over 10A, instead of the rated max of 8A. Anyone encounter something like this before?
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