[RE-wrenches] Conduit Fill Calculator

[Jason Szumlanski]

No problem. If you want a panel or inverter not in the calculator, contact
me off-list and I will add it.


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, Apr 20, 2026 at 9:56 PM Howie Michaelson via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Jason,
> Another nice App. Very much appreciate your generosity in sharing!
>
> Howie Michaelson
>
>
> On Mon, Apr 20, 2026 at 6:42 PM Jason Szumlanski via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> Thanks, all, for the positive feedback on and off list.
>>
>>
>> I have another calculator that isn't ready for prime time yet, but I'm
>> working on a MPPT string calculator. It pulls in panels from NREL (I
>> only have a subset right now), but I have to add the inverters manually.
>> You're welcome to try it out:
>>
>> https://floridasolardesigngroup.com/mppt-calculator
>>
>>
>> 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, Apr 20, 2026 at 5:40 PM Kent via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>>> Very nice app!
>>>
>>> Kent Osterberg
>>> Blue Mountain Solar
>>>
>>>
>>> On 4/19/2026 5:12 PM, Jason Szumlanski via RE-wrenches wrote:
>>>
>>> Hi All,
>>>
>>> I got tired of using an old go-to conduit fill calculator online. It was
>>> too hard to use. And none of the popular mobile apps appealed to me. So I
>>> created my own. You're welcome to use it.
>>>
>>> https://floridasolardesigngroup.com/conduit-fill-calculator
>>>
>>> Feedback off-list encouraged.
>>>
>>> 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
>>>
>>>
>>>
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