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

[Aaron Mandelkorn]

I am pushing for 48v.  The main concern with doing so are how to best
continue to provide 24v power to the 23v circuits.  Now I am thinking
rather than using a dc stepdown converter, I could potentially use 24v
batteries in series/parallel and power the loads directly off of the
battery.  Not sure how this would throw off the electrical balance of the
battery.  Thanks all.  I appreciate help and direction with this.  Looks
like there are a few options for me to consider.

Aaron Mandelkorn
President / Founder
Renewable Energy Outfitters
www.reosolar.com
Off Grid Depot
www.offgridnow.com
970-596-3744

On Thu, Jan 27, 2022, 11:49 AM frenergy <frenergy at psln.com> wrote:

> Aaron,
>
>             Ain't nothing wrong with going to 48 volt.  It sort of sounded
> like you wanted to stick with 24 volt but if they want to replace PVs too
> (which it sounded like in your original post), go 48.
>
> Bill
>
> Feather River Solar Electric
> Bill Battagin, Owner
> 4291 Nelson St.
> Taylorsville, CA 95983
> 530.284.7849
> CA Lic 874049
>
> On 1/27/2022 9:09 AM, Aaron Mandelkorn 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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