Model Results

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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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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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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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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?


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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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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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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

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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Runtime error using macro for Electric Load

When I try to run macro for Electric Load after choosing LargeOffice I get the following error script:

TMY3 ID: on":"1
Macro did not finish.
[97] runtime exception at line 97: array index out of bounds at 1010 (length: 1010)

Please help

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SusanSun17's picture
Rainflow Counting for Degradation

Hi, I am interested in techno-economic battery models and SAM seems to be one of the few that includes battery degradation (to my knowledge??). I have been reading Nicholas DiOrio's 2015 report and I would like to know more details about the lifetime model.

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Understanding losses diagram and results


I'm trying following the method recommended in another topic, subtracting the percentage from 1.0 and then multiplying, but I still can't make sense of these losses or the resulting kWh production.

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