Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page

# How to model an off-grid building?

I have added Generator:Photovoltaic, ElectricLoadCenter:Generators,ElectricLoadCenter:Inverter:Simple, ElectricLoadCenter:Storage:Battery and ElectricLoadCenter:Distribution. Since it is an off-grid building, I was surprised that the HTML report in results showed that there is "Electricity coming from utility" and "Surplus Electricity going to utility". What can I do to define that it is not grid-connected?

edit retag close merge delete

Sort by » oldest newest most voted

I am not completely sure this can be done. All electric demands must be met. If the PV plus storage cannot meet the current electric demand then power will be taken from the utility unless DemandManager* objects are used to shed load. It should be possible to avoid exporting power to the utility, but I cannot say that I've tested that. Start with example file LrgOff_GridStorageDemandLeveling.idf and look at the utility demand fields in ElectricLoadCenter:Distribution.

more