Energy handle

p = peripheral.getNames()
for i=1,#p do
    tab[i] = peripheral.wrap(p[i])
    if p[i] == "top" then
        chest = peripheral.wrap(p[i])
    end
end

while true do
    sum = 0
    stored = 0
    for o=1,#tab do
        if peripheral.getType(tab[o]) ~= "ender_chest" then
        sum = sum + tab[o].getMaxEnergyStored()
        stored = stored + tab[o].getEnergyStored()
    end
    if (stored/sum)<0.5 then
        chest.pushItem("north",1,1)
        sleep(120)
    end
    sleep(5)
end