I agree with you we are measuring voltage drop across a shunt but ohm's law says that when in series voltages sources (like batteries) add. Do we agree that cells are "like" batteries ? When in series cells give higher voltage, when in parrallel, cells give higher current. So here, we have 10 series cells giving an open circuit of 5 volts. To keep each cell in the current source mode (as explained in the link), we HAVE to keep each cell to 0,1v and this is done with the shunt. But as total voltage is 10 times higher (parrallel batteries) we have to have 1 volt voltage drop in the shunt. This way each cell will have a voltage drop of 0,1 v exactly like shown in the link.

In fact, another way to see it is to imagine having 10 reference circuits (like the one in the link) and put them in series. Total current will not change, but the total voltage from end to end of the 10 circuits will be increased by a 10 factor (like we add batteries voltage when batteries are in series). Some people working with BWP34 add some in series to higner the generated voltage.

if you think cells are batteries, and we should easily agree on that, it's clear that total voltage from 10 series cells increases by ten. For having each cell in the current source mode, which is the basis of the theory, we have to have each cell at 0,1 volt. With 10 series cells, total solar panel voltage MUST be 10 X 0,1 volt which gives a total voltage of 1 volt for 10 cells and easier treatment.

J guy

In fact, another way to see it is to imagine having 10 reference circuits (like the one in the link) and put them in series. Total current will not change, but the total voltage from end to end of the 10 circuits will be increased by a 10 factor (like we add batteries voltage when batteries are in series). Some people working with BWP34 add some in series to higner the generated voltage.

if you think cells are batteries, and we should easily agree on that, it's clear that total voltage from 10 series cells increases by ten. For having each cell in the current source mode, which is the basis of the theory, we have to have each cell at 0,1 volt. With 10 series cells, total solar panel voltage MUST be 10 X 0,1 volt which gives a total voltage of 1 volt for 10 cells and easier treatment.

J guy