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Hi, I have this problem, I have one feed for energy use and one feed for solar energy product, so I have a log to feed with this operation (energy use - energy product, example 100 energy use - 50 energy product =   50) it is a value positive that I take from my energy distributor, but if I have 50 energy use - 100 energy product = -50 (this is a negative value)

Now for have a totalize use energy from energy distributor I cannot use 50 + -50 = 0, but I need to totalize only positive value , so in this case the correct value is +50 from energy distributor.

it's possible?

thanks