Optimal battery sizing for peak shaving

Hi SAM support team!

Is it possible to find an optimal battery sizing in a Generic System without PV insertion (PV losses = 100%) for a peak shaving application? I know that BLAST-BTM tool does, but it is not so accurate as SAM since it does not consider battery degradation. 

I've been trying to use the REopt API, but I'm getting the following error:

Could not evaluate callback function:call_reopt->on_change[28]: error in call to 'reopt_size_battery()': Must be run from Photovoltaic case with Residential, Commercial, Third Party or Host Developer model.[13]: eval error in statement list

When I try to run from a Photovoltaic case, another error pops up and so on... so, I've decided to ask before inputing all my effort here.
Thanks!

Hi Rafael,

The ReOpt optimization option only works with the PV Battery configurations when battery dispatch is allowed to charge the battery from the grid.

We're looking into the Generic Battery configurations -- we either need to remove the ReOpt option from that configuration, or fix i so it does not display that error message. I'll follow up when that is resolved.

If the optimization is not working for a system with no PV (DC losses set to 100%), you might try running it with a very small PV system to see how well it works under those conditions.

Best regards,
Paul.

Thanks Paul! I'll wait for the follow up  

Hi Paul, 

I was wondering if there are any updates with regard to the REopt sizing and dispatch option for the Generic System in the new release of SAM (2020.11.29)?

I would like to use this module in GUI for standalone battery system, with 'Nominal capacity factor' for Generic Power Plant set to 0% and "Plant cost per capacity" set to 0$/W.

After first try, I received the following error: 

Could not evaluate callback function:call_reopt->on_change
[5]: error: _s
[5]: error: _s
[4]: eval error in statement list

Your advice would be greatly appreciated.

Many thanks!

Hi Agnes,

That is a bug with the Generic - Battery model: The REopt integration does not work for that model in SAM 2020.11.29. We will address this issue in first update. Thank you for bringing it to our attention.

github.com/NREL/SAM/issues/479

Best regards,
Paul.