AC and DC Loads  


Hi All, 

I am in the process of writing my Thesis for my undergrad degree in Electricial Engineering.  I am exploring AC vs DC and whether a DC system would be beneficial financially and efficiency wise.  I have measured all the appliances in home and 'modelled' my home which is the basis of the data that I am using in HomerPro. So I have made the network of grid to AC bus to load (my house).  Then I did the same but with a DC bus through a converter of 100% efficiency with the same load reading however it is giving me the power drawn from the grid as approx 200KWh less per year than AC.  I am struggling to think of reasons why this occurs.  Anyone that can explain why the DC load is coming out lower when it is the same load just on DC than AC. 


I have tried to check HomerPro's manual without success. 



Posted : May 5, 2018 9:31 pm
Illustrious HOMER Admin

Hello Chris,


If you just switched from AC to DC in Load Type, the values shouldn't change. Make sure the Scaled Annual Averages are the same for both AC and DC.



Dhiwaakar Rajasekaran

Posted : November 26, 2018 3:50 pm

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