Model Results

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klucas@energy.s...
Changing month to calculate rolled over kWh?

Hi,

Is there a way to change the month when the "Sell rate for kWh rolled over at end of year" calculation takes place? It seems that SAM defaults to cashing out credits at the end of December, but a number of states have a different month that allows kWh to be carried forward through the winter before being cashed out (for example, Maryland is the end of April at a generation-only rate).

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oavaldezi
oavaldezi's picture
'Cash Flow' results tab doesn't have scroll bars

The 'Cash Flow' results tab doesn't have scroll bars: I have to maximize and then restore the SAM window for the scrollbar to appear.

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oavaldezi
oavaldezi's picture
Federal Income Tax schedule (instead of flat rate) error

I've entered a Federal Income Tax schedule, with the rate at 0% for the first 10 years, and 30% afterwards. When I export to Excel with formulas, the values for "After-tax value of energy generated by system" and "After-tax cash flow" are in error, because their formulas reference the "federal_tax_rate" name, and they should reference the "AnnualTaxFederal" name.

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fatima ibrahim ...
error 612 when displaying report on pvsystems

i updated the latest version 2017 and when i create a report it shows the performance model but does not display the financial aspect instead about four error messages error 612... i have uninstalled and reinstalled but still no progress.

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tric
Irradiance data validity check too restrictive?

Dear SAM team,

I have encountered some errors relating to invalid irradiance data recently. The specific message I got are of this type:
out of range global irradiance 1513 W/m2 at time [y:2010 m:5 d:26 h:13], set to zero

Due to cloud enhancement, it is actually possible that the available irradiance can exceed the extraterrestrial irradiance for minutes at a time in extreme cases, see related reads below for readers of this thread. In my case I was simulating the system with minute data, containing such extreme values.

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vas013
hourly sub-array output

Is it possible to get the hourly sub-array DC output? I am modelling a system with 3 sub-arrays; facing east, north (southern hemisphere) and west. I would like to optimise the sizing for each sub-array if possible, but can't find the hourly data. There is hourly current and voltage, so presumably it is calculated?

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cgiron
O&M Production-based expense

Good morning,

I'm looking for information on how to modify the cost of O&M Production-Based Expense that is calculated for the Solar PV commercial model. I would like to know if there is a way to do it without having to export to excel?

Thanks

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sashilover
One quick question

I tried to model my plant so that it doesn't work during the night, what I have been doing is modifying the dipatch control, and I don't want it working during the night hours,
I've set the turbine out fraction equals to zero.
As soon as I run the simulation, I get the negative values for the power of system generated, what does that mean? please advise.

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caseyzak24
Using SAM with SolarAnywhere TMY and CEC heat transfer model

I am trying to use SAM with SolarAnywhere TMY data and I would like to be able to use the CEC heat transfer module for cell temperature correction. Currently, using a SA weather file (converted with the SA converter provided on the samples page) results in cell temperatures >300deg C (Files attached).

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Nisarg
Questions in inverter module database and output ac power of a solar inverter.

Hi there,

I am doing a research project on Solar PV plant modelling. I got the excel file of inverter parameters at https://sam.nrel.gov/sites/default/files/sam-library-cec-inverters-2015-...

Certain queries I have, please answer if possible.

1. Where can I get AC Output power (Pac) generated by the inverters?

2. What is PDc0?

3. Is Vdcmax given in excel file the same as
VDC described in SANDIA Inverter model?

Thank you in advance.

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