John. I have 2 meanwell rsp 3000 48 power supplies. Each machine's output is 48 volts and 62.5 amps. They can be wired in parallel with up to 3 power supplies together with an out put of 187.5. I am not an electrical engineer but am pretty handy. My rule of thumb is to try and keep these units at half capacity. I will be adding a 3rd power supply soon to give 90 amps at half their rated capacity. They are available on amazon but I suggest Mouser electronics in case you need any help or parts. I'm sure there are other brands out there. Cost is 360 to 500. Input power 180-260v ac. 2 phase 220 is ok or single phase ac in those voltages. Good luck. Wade
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On Saturday, December 16, 2017, 9:25 AM, oak oak_box@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:
Wade,Can you (or anyone else) give a source for large amperage 48V power supplies? The biggest ones I've found casually peeking online were at most 20A.I'd be very curious about your 3000W 48V power supplies (where do you get them, how much do they cost, what is the peak RUNNING current they can provide (for as long as 2-3 hours)?Thanks,JohnOn Friday, December 15, 2017, 10:55:35 AM CST, rwadecarr@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:Hello,I watch most of these posts and do not reply. But today I feel like it. I have a 16000 lb junk rigged schooner, a 10kw electric motor with a 48 volt 220 amp/hr bank. I recharge with wind, or at the dock , or with 2 honda 2000 generators with 1 40 amp charger and another 25 volt charger. I have motored sailed this configuration over 1000 miles on the east coast. If you have chargers capable of providing more amps than you ask of them and can run them with a generator while underway you can effectively motor all day everyday. This left me at the end of each day with batteries that always needed a little more charging to get topped back off. I don't want to hear that in my anchorage so I have recently changed this up somewhat and now power two 3000 watt 48 volt switching power supplies with my generators. This allows me to motor at about 70 amps continuous without using or charging the batteries at all. I need a 6 kw genset and I would have 120 amps of 48 volt power for the motor. at 80 amps the boat can achieve hull speed of 7.5 knots.I prefer this than to constantly be charging batteries that can never be adequately topped off unless you run the gensets way more than I care to. This new configuration is new but is working very well. At some point a diesel genset will replace the Honda's. So if I leave the dock and need to motor all day up the ditch I turn on this setup and arrive at my anchorage with my batteries none the wiser for the trip and I do not need to run the generators any additional time while at anchor at all. The previous owner used a 1500 watt power supply and brought the boat from Nova Scotia to Tampa using a single Yamaha genset on deck. I feel that these boats must be designed to compete with boats with diesel motors or they remain a novelty as most of us do have other lives but want to enjoy our boats and not just wait for favorable winds. Wade
Posted by: Wade Carr <rwadecarr@yahoo.com>
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