New constraint in an optimization problem NEED HELP

Hi,

I'm using the optimization model from Matlab which you can see in https://www.mathworks.com/videos/optimization-in-energy-management-systems-1561902499222.html and I'm interested to change the loadBalance constraint to a load shifting constraint shown in the image attached but I'm struggling to change it as the optimization model doesn't work.

The codes related to constraints are the following:

function [Pgrid,Pbatt,Ebatt] = battSolarOptimizeW(N,dt,Ppv,WIND,Pload,Einit,Cost,FinalWeight,batteryMinMax)
% Minimize the cost of power from the grid while meeting load with power 
% from PV, wind, battery and grid 
prob = optimproblem;
% Decision variables
PgridV = optimvar('PgridV',N);
PbattV = optimvar('PbattV',N,'LowerBound',batteryMinMax.Pmin,'UpperBound',batteryMinMax.Pmax);
EbattV = optimvar('EbattV',N,'LowerBound',batteryMinMax.Emin,'UpperBound',batteryMinMax.Emax);
% Minimize cost of electricity from the grid
prob.ObjectiveSense = 'minimize';
prob.Objective = dt*Cost'*PgridV - FinalWeight*EbattV(N);
% Power input/output to battery
prob.Constraints.energyBalance = optimconstr(N);
prob.Constraints.energyBalance(1) = EbattV(1) == Einit;
prob.Constraints.energyBalance(2:N) = EbattV(2:N) == EbattV(1:N-1) - PbattV(1:N-1)*dt;
% Satisfy power load with power from PV, grid and battery
prob.Constraints.loadBalance = Ppv + WIND+PgridV + PbattV == Pload;
%prob.Constraints.loadBalance = Ppv + WIND+PgridV + PbattV == Pload 
%if Ppv + WIND+PgridV + PbattV == 0.8*Pload 
 %   Pload  
%else 
   % Ppv+WIND=0.8*Pload;
    % Solve the linear program
options = optimoptions(prob.optimoptions,'Display','none');
[values,~,exitflag] = solve(prob,'Options',options);
% Parse optmization results
if exitflag <= 0
    Pgrid = zeros(N,1);
    Pbatt = zeros(N,1);
    Ebatt = zeros(N,1);
else
    Pgrid = values.PgridV;
    Pbatt = values.PbattV;
    Ebatt = values.EbattV;
    end

I appreaciate any help!