[RE-wrenches] Large lithium chargers

Thu Dec 2 15:36:55 EST 2021

I’m currently building a similar sized system (a bit larger), so I know what the costs are for such scale. Seems like 6-9 SolArks or XWpros for dedicated closed loop charging only wouldn’t be unreasonable? 

If an equally sized battery charger exists it would be a monstrosity!

> On Dec 2, 2021, at 7:53 AM, Jay <jay.peltz at gmail.com> wrote:
> 
> Hi all
> 
> Sorry I guess I didn’t explain the clients wants well enough
> 
> 1. 90-100kwh+ 48 vdc lithium battery 
> 2. 208 3 phase AC generator powering 48v nominal battery chargers.
> 208-3phase as that is the house/EE design voltage. 
> 3. AC generator because it’s back up if the inverters fail, so no DC generator. 
> 4. Client doesn’t want any drop outs or have to reset clocks etc during generator/inverter- charging/switchover.
> 5. Inverter size is not decided yet, probably 40-80kw. 
> 6.  Generator size isn’t specified yet, but given the loads 60-125kw probably. 
> Size would be based on battery charging or max ac load which ever is larger. 
> 
> That leads me external chargers. 
> 
> I’m looking for large programmable battery chargers for lithium batteries powered from a 208-3phase ac generator in the 60-125 kw size range. 
> 
> Thanks
> 
> Jay
> 
> 
> 
> 
> 
> 
>> On Dec 2, 2021, at 6:56 AM, MDElectricSolar <mdelectricsolar at gmail.com> wrote:
>> 
>> Maybe a DC output generator, the Wildcat Maverick charges a 48v battery bank directly and has it’s own controls, independent from the inverter.
>> 
>> https://wildcatpowergen.com/pages/maverick <https://wildcatpowergen.com/pages/maverick>
>> 
>> Michael D Nelson
>> MD Electric & Solar, Inc.
>> 707-684-0064 mobile
>> 707-884-1862 office
>> www.mdelectricsolar.com
>> www.facebook.com/mdelectricandsolar
>> 
>> 
>>> On Dec 2, 2021, at 6:27 AM, Mac Lewis <maclewis1 at gmail.com> wrote:
>>> 
>>> 
>>> Hi Jay, 
>>> 
>>> Is the plan to feed DC current (from generator and grid) into the batteries and keep the inverters as power source for loads?
>>> 
>>> On Thu, Dec 2, 2021 at 6:30 AM Darryl Thayer <darylsolar1 at gmail.com <mailto:darylsolar1 at gmail.com>> wrote:
>>> Jay I am confused as usual, what are the loads?  AC or DC?  How are you charging the battery from the generator or how is the battery powering the loads?   What is the desired current or the size of the generator?  sorry if this I dumb question
>>> 
>>> On Wed, Dec 1, 2021 at 2:23 PM Jay <jay.peltz at gmail.com <mailto:jay.peltz at gmail.com>> wrote:
>>> I got a call from a colleague that is designing a very large roughly 90-100 kWh lithium battery at 48v. 
>>> 
>>> He’s looking for large AC chargers to charge this bank. The reason is total elimination of switch over delay from inverter to generator and back. 
>>> 
>>> One technique is to use inverters for this, but pretty pricey. 
>>> 
>>> Any recommendations as to equipment, brands etc?  
>>> 
>>> It would be a 208 3 phase AC side powered by a generator. 
>>> 
>>> Thx 
>>> Jay
>>> 
>>> Peltz power. 
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>>> -- 
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>>> 
>>> Mac Lewis
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>>> "Yo solo sé que no sé nada." -Sócrates
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	Michael Morningstar

     	Morningstar Electric
	PO Box 1494
	Mount Shasta, California 96067
	530-921-0560
	CSLB 949635

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