Domoticz

I've made the script for uploading my electricity tot pvoutput.
I've onli made the calculatin part.
What i don't understand is the difference between the graph from my P1 smart meter en the calculation.

This is my script:

-- /home/pi/domoticz/scripts/lua/script_device_calculate_consumption.lua
-- This script collects the values below from Domoticz
-- * The Power and energy values (import and export) from a smartmeter
-- * The Power and energy values from a Solar power inverter
-- It then calculates the consumed power and energy from the values above with the formula's
-- * EnergyConsumption = EnergyGeneration + EnergyImport - EnergyExport
-- * PowerConsumption = PowerGeneration + PowerImport - PowerExport
-- It then updates a virtual device which displays the consumed power and energy in Domoticz

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-- Domoticz IDX and names of the needed devices
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local GenerationDeviceName = "Zonnepanelen" -- Device name of the Generated energy
local EnergyDeviceName = "Elektra" -- Name of the energy device that shows imported and exported energy
local ConsumptionIDX = 41 -- IDX of the energy device that shows calculated Consumption
local ConsumptionDeviceName = "Verbruik" -- Name of the energy device that shows calculated Consumption

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-- Require parameters
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local http = require("socket.http")

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-- Script parameters
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EnergyImportLow = 0 -- in Watt hours
EnergyImportHigh = 0 -- in Watt hours
EnergyExportLow = 0 -- in Watt hours
EnergyExportHigh = 0 -- in Watt hours
EnergyGeneration = 0 -- in Watt hours
PowerGeneration = 0 -- in Watts
EnergyImport = 0 -- in Watt hours
PowerImport = 0 -- in Watts
EnergyConsumption = 0 -- in Watt hours
PowerConsumption = 0 -- in Watts
Debug = "YES" -- Turn debugging on ("YES") or off ("NO")

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-- Lua Functions
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function update(device, id, power, energy, index)
commandArray[index] = {['UpdateDevice'] = id .. "|0|" .. power .. ";" .. energy}
end

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-- CommandArray
----------------------------------------------------------------------------------------------------------
commandArray = {}
-- Generated
PowerGeneration, EnergyGeneration = otherdevices_svalues[GenerationDeviceName]:match("([^;]+);([^;]+)")
if Debug=="YES" then
print(" ----- PowerGeneration = " .. PowerGeneration .. " W");
print(" ----- EnergyGeneration = " .. EnergyGeneration .. " Wh");
end

EnergyImportLow, EnergyImportHigh, EnergyExportLow, EnergyExportHigh, PowerImport, PowerExport = otherdevices_svalues[EnergyDeviceName]:match("([^;]+);([^;]+);([^;]+);([^;]+);([^;]+);([^;]+)")
EnergyImport = EnergyImportLow + EnergyImportHigh
EnergyExport = EnergyExportLow + EnergyExportHigh
if Debug=="YES" then
print(" ----- PowerImport = " .. PowerImport .. " W");
print(" ----- EnergyImportLow = " .. EnergyImportLow .. " Wh");
print(" ----- EnergyImportHigh = " .. EnergyImportHigh .. " Wh");
print(" ----- EnergyImport = " .. EnergyImport .. " Wh");
print(" ----- PowerExport = " .. PowerExport .. " W");
print(" ----- EnergyExportLow = " .. EnergyExportLow .. " Wh");
print(" ----- EnergyExportHigh = " .. EnergyExportHigh .. " Wh");
print(" ----- EnergyExport = " .. EnergyExport .. " Wh");
end


-- Calculate consumption
PowerConsumption = PowerGeneration + PowerImport - PowerExport
if Debug=="YES" then
print(" ----- PowerConsumption = " .. PowerConsumption .. " W");
end
EnergyConsumption = EnergyGeneration + EnergyImport - EnergyExport
if Debug=="YES" then
print(" ----- EnergyConsumption = " .. EnergyConsumption .. " Wh");
end

-- Update comsumption device in Domoticz
if devicechanged[EnergyDeviceName] then
update(ConsumptionDeviceName, ConsumptionIDX, PowerConsumption, EnergyConsumption, 1)
end


return commandArray

And this are the graphs:
Graph P1 smart meter and calculation added as files.
The graphs are still different while as my opinion they must equal

Can somebody explain me what's going wrong?