Victron 100/20 mppt

karalal

karalal

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This is the screen shot I have been sent by a friend why is there 17.11 showing
On the display


 

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Looks like this is a duplicate thread. But the original had large blank spaces, hard to read on a phone I imagine.

As Bobby-gg pointed out in the other thread, it looks like the battery and panel wires are crossed.

17V is more like a solar panel voltage, and 12.6V is a typical battery voltage. Since the input is lower than the output, the current (amps) is zero.

If you change the connections, make sure you connect the battery wires first, so that the MPPT can sense the battery and register that it's a 12V battery not a 24V one. Since you've had 17V on the battery input, it could easily have decided it's a 24V battery.
 
autorouter said:
Looks like this is a duplicate thread. But the original had large blank spaces, hard to read on a phone I imagine.







As Bobby-gg pointed out in the other thread, it looks like the battery and panel wires are crossed.







17V is more like a solar panel voltage, and 12.6V is a typical battery voltage. Since the input is lower than the output, the current (amps) is zero.







If you change the connections, make sure you connect the battery wires first, so that the MPPT can sense the battery and register that it's a 12V battery not a 24V one. Since you've had 17V on the battery input, it could easily have decided it's a 24V battery.
Click to expand...
 

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Looks like the cable swapping did the trick. Solar panel input 20.11V, 1.7A, so that's 20.11 x 1.7 = 34W. Output to battery is 13.69V 2.4A, so that's 32.8W. It shows 'Bulk' charging, so that voltage of 13.69V should be gradually rising to the absorption voltage of about 14.4V. It should stay at the absorption voltage for some time, maybe hours. Or minutes if the battery is already quite full. Then it should drop to the 'float' voltage of about 13.4V, and stay there as long as the sun lasts.
 

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