[RE-wrenches] 24v to 48v upgrade help

[Maverick Brown]

I’ve installed a few ARK battery 48V, 100ah and they offer a 24V, 200Ah version

https://arklithium.com/

Maverick Brown
Off-Grid Solar Commander since 2006
Maverick Solar Enterprises, Inc.
 • Solar Commander Remote Power
 • SunFlow Systems Cathodic Protection 
maverick at mavericksolar.com
512-460-9825


> On Jan 27, 2022, at 11:09 AM, Aaron Mandelkorn <reosolar at gmail.com> wrote:
> 
> 
> All,  I will do a load analysis for the 24v loads.  I am looking to get around 800ah of LI storage at 24v.  I typically use the larger 48v batteries from fortress.  The space constraints will not allow for a wall full of small 50ah 24v units. I am not finding much selection of 24v 200ah+ options.  Is sounds like most of the advice I am getting is towards not upgrading to 48v.
> 
> Aaron Mandelkorn
> President / Founder
> Renewable Energy Outfitters
> www.reosolar.com
> Off Grid Depot
> www.offgridnow.com
> 970-596-3744
> 
>> On Wed, Jan 26, 2022, 7:59 PM frenergy <frenergy at psln.com> wrote:
>> Aaron,
>> 
>>             It would be helpful to know how many amps are required to power the 24 volt loads and should we assume the batteries are toast or nearly so?  The brand of inverter?
>> 
>>             As Jeff said there are 24V L-ion choices.
>> 
>> Bill
>> 
>> Feather River Solar Electric            
>> Bill Battagin, Owner
>> 4291 Nelson St.
>> Taylorsville, CA 95983
>> 530.284.7849
>> CA Lic 874049
>> On 1/26/2022 4:16 PM, Aaron Mandelkorn wrote:
>>> Wrenches,
>>> 
>>> I have a customer with a very old 24v off grid pv system.  He wants to upgrade his array, inverter and battery bank.  There are no options for inverter/chargers over 4000 watts in 24v dc.  The same goes for lithium iron batteries.  Everything (of higher wattage and battery capacity) seems to be in 48v only now.  If going to 48 volts how do I acomodate the few but important 24v DC loads in the home.  Is a 48v to 24v step down converter the best option?  What do you think? Any help would be appreciated.  Thank you.
>>> 
>>> Aaron Mandelkorn
>>> President / Founder
>>> Renewable Energy Outfitters
>>> www.reosolar.com
>>> Off Grid Depot
>>> www.offgridnow.com
>>> 970-596-3744
>>> 
>>> 
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