question

ers avatar image
ers asked

2 mppts connected to same spot measures different voltages is it normal ?

I have 2 mppts connected to same busbar with very short cables


MPPT 150/100 measuring 12.25 MPPT 100/50 measuring 12.28


gap is sometimes bigger sometimes less. is this normal ?

MPPT Controllers
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

2 Answers
seb71 avatar image
seb71 answered ·

0.03V difference is not a concern in any way.

If other times there is bigger difference, how big?

1 comment
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

ers avatar image ers commented ·

around 0.10V maybe. shouldn't it be perfect with no difference?

0 Likes 0 ·
Lars Filusch avatar image
Lars Filusch answered ·

depending on the current there should be a difference.

1 comment
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

ers avatar image ers commented ·
this is when there is no current flowing from mppts at night time, they are connected to same spot. other then they are not really good calibrating what could be the reason?
0 Likes 0 ·