question

rene-e700 avatar image

Smart mppt 150/35 gives error 33 allready at 130V. How can i change the setting to 150V?

Smartsolar MPPT 150/35 will not charge because it always gives error 33.

I have 2s2p config of 4 Panasonic HIT panels.

Voc is 133V. This is a lot less then the max. 150V

mppt smart solar
2 |3000 characters needed characters left characters exceeded

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 ·

Maybe there are short duration voltage spikes up to 150V.

Try to monitor it for a while, using the "Trends" tab (and select "Solar Voltage").


Would not hurt to also actually measure the voltage at MPPT's PV terminals, with a multimeter.

5 comments
2 |3000 characters needed characters left characters exceeded

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

The problem is continuously and i see no spikes.

If it is not possible to change the setting then i believe it is a wrong factory setting or a bug.

Thnx for your response.

More likely a defective unit.


Is it new?

Yes it is brandnew

Contact the seller.

I will. thnx.

seb71 avatar image
seb71 answered ·

When cold, the actual voltage can be higher than VOC from PV panel specifications.

Did you actually measured it and it was 133V or it's the value from PV panel specifications (for the string of panels)?

1 comment
2 |3000 characters needed characters left characters exceeded

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

It is the measured value in the App.

screenshot-20210220-114511.jpg