Does the client know that they can't blame you for doing something that
has chances of being a bad choice?
Can the client keep track of two different Soc and be responsible about
it?
I would also look into how a home insurance policy would react to a
claim.
Dave Angelini Offgrid Solar
"we go where powerlines don't"
[1]https://offgridsolar1.com/ [2] [1]
e-mail [email protected]
text 209 813 0060
On 2025-07-14 6:45 am, Jason Szumlanski via RE-wrenches wrote:
They are Lithionics.
Jason Szumlanski
Principal Solar Designer | Florida Solar Design Group
NABCEP Certified Solar Professional (PVIP)
Florida State Certified Solar Contractor CVC56956
Florida Certified Electrical Contractor EC13013208
On Mon, Jul 14, 2025, 9:33 AM jay via RE-wrenches
<[email protected]> wrote:
Hi Jason,
can you let us know what the old battery is so we can dig up the specs
and see if there would be any issues.
There are a few odd ball like simpliphi which while a 51.2v has a very
narrow window for operation compared to most other prismatic cells.
jay
On Jul 14, 2025, at 5:07 AM, Jason Szumlanski via RE-wrenches
<[email protected]> wrote:
There are never-ending videos on YouTube showing different brands and
capacities of LFP batteries working in parallel. I have never tried it
myself, and every instinct says don't do it, but I have a situation
where it would be very helpful.
I have a client with an older 60 kWh battery that is discontinued and
incompatible with any other battery from the same manufacturer. It has
a BMS with a 51.2 volt nominal rating. They need another 20 kWh of
capacity. It is too costly to scrap the existing battery and start
over, and the existing battery has been tested and confirmed to hold
very close to its rated capacity.
What is the real deal on mixing and matching? Is anyone doing this
safely and successfully? I wonder what the battery manufacturers say
about it.
Jason Szumlanski
Florida Solar Design Group
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