question

biozor avatar image
biozor asked

MPPT75/15, use of 5V of Victron VE.direct port as 5V power supply ?

Hello team!

I have a SmartSolar MPPT75/15 and i'm asking if 5V of the Victron VE.direct port could be use to run tiny MCU like Arduino or ESP8266 ? What is the power capability of this pin ?

I know I can use a regulated voltage and current from LOAD output with more components...

Thank you

Matthieu

MPPT ControllersVE.Directarduino
3 comments
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.

biozor avatar image biozor commented ·

Oh!... And is the Ground pin of Victron VE.direct port same voltage reference as LOAD negative pin ? (VE.Direct GND pin = LOAD negative pin ?) Thanx

0 Likes 0 ·
holger73 avatar image holger73 commented ·
I purchased the same device and thought that I can use power+ of the ve.direct port to convert from 3.3V to 5V but it turned out that power+ is not 5V but 3.3V


What's the use of the power+ if it can neither be used to power smaller devices nor used to convert the signal level?


0 Likes 0 ·
klim8skeptic avatar image klim8skeptic ♦ holger73 commented ·
@holger73 the port on the mppt is designed to power Victron mppt accessories(BT dongle, mppt control, etc) rather than as a general power supply.

Available current draw is limited to 3-5 mA.


0 Likes 0 ·
3 Answers
Daniël Boekel (Victron Energy Staff) avatar image
Daniël Boekel (Victron Energy Staff) answered ·

Hi @Biozor

Please don't do this, this could give wrong values from MPPT and / or damage it.

it's really a tiny amount it can provide, even using non-standard cables can already give strange error's.

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.

biozor avatar image
biozor answered ·

Hi! I read in VE.Direct Protocol FAQ :
https://www.victronenergy.com/live/vedirect_protocol:faq

"Q5: How much current can I draw from the power pin in the VE.Direct port?
Max 10mA average, with max 20mA/5ms bursts."

Bye!

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.

biozor avatar image
biozor answered ·

OK Thanks! 5V Victron VE.direct port is only for voltage level !

So, can I connect GND pin of Victron VE.direct port to LOAD negative port ?

2 comments
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.

Daniël Boekel (Victron Energy Staff) avatar image Daniël Boekel (Victron Energy Staff) ♦♦ commented ·

I'm sorry I don't know...

0 Likes 0 ·
biozor avatar image biozor Daniël Boekel (Victron Energy Staff) ♦♦ commented ·

hmmm.. yes obviously for voltage level too. And yes, never connect 5V output.

0 Likes 0 ·

Related Resources

MPPT Product Page

MPPT Error codes

MPPT 150/60 up to 250/70 Manual

VE.Direct protocol FAQ

Additional resources still need to be added for this topic