What does the dongle use to detect temperature?

I fear you may both be wrong. This device contains a temperature sensor built in. It can also display the temp from the victron sensor when connected appropriately.

why would I buy a victron product if I need an $80 serial cable to communicate with it?

You don't need an $80 serial cable, the Bluetooth device is what costs money. It uses an ethernet cable.

Will this allow me to upgrade firmware in my multiplus via my phone cellular data?

No. To upgrade and make critical settings you must plug into you PC. I think this is done for safety reasons.

Can I have this plugged in and use at the same time as the digital muilticontrol panel? Or is it one or the other?

I also have the Digital Multi Control 200/200A GX installed and the DMC takes over power on/off control. The Victron Connect app accessing the BT Smart Dongle still works, however with many reduced features. Mostly just the Overview screen in Victron Connect and the Details view is limited. It actually displays in Victron Connect the message "VE Bus Smart Dongle is running in secondary mode because there is a remote control panel connected to the VE bus. In secondary mode only a limited number of values are available"

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Victron Energy VE.Bus Smart Dongle for Multiplus/Inverter

Product ID: 258965014

Details

Brand
Victron Energy
Colour
Blue
Item weight
0.08 Kilograms
Material
several
Product dimensions
10L x 3W x 6H

📱Seamless VictronConnect app integration

🔋Bluetooth-enabled inverter control

🌡️Real-time voltage & temperature sensing

R3437

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Power up your control game—smart, sleek, and always connected.

PLUG PLAY SETUP - Quick installation with no batteries required—get connected and running in minutes.
DUAL FUNCTIONALITY - Combines Bluetooth connectivity with precise voltage and temperature sensing in one sleek device.
COMPACT LIGHTWEIGHT - At just 80g and 10x3x6 cm, it fits perfectly in tight spaces like caravans and yachts.
SMART BLUETOOTH CONTROL - Effortlessly monitor and adjust your Multiplus/Inverter settings from your smartphone.
OPTIMIZED FOR MOBILE LIVING - Ideal for smaller vessels and motorhomes where full GX systems feel excessive.

The Victron Energy VE.Bus Smart Dongle is a compact Bluetooth accessory designed for seamless monitoring and control of Victron Multiplus and other inverter/chargers. It doubles as a voltage and temperature sensor, enabling real-time system insights via the VictronConnect app. Perfect for mobile and off-grid setups, it offers plug-and-play installation without batteries, making advanced inverter management accessible and hassle-free.

Specifications

ASIN	B07FCV43LQ
Batteries required	No
Best Sellers Rank	#61,321 in Computers ( See Top 100 in Computers ) #189 in Bluetooth Network Adapters
Customer Reviews	4.6 4.6 out of 5 stars (445)
Date First Available	11 February 2019
Included components	Components included in the description
Item Weight	0.08 Kilograms
Item model number	NT-1066
Item volume	198 Milliliters
Product Dimensions	10 x 3 x 6 cm; 80 g

Reviews

M**N

Useful connector for Inverter/charger

Perfect for connecting my laptop to my Victron Inverter/Charger

30.05.2026

H**D

great

easy to set up and install\ works as expected simple plug and play

22.10.2025

B**.

fonctionne, mais...

Focntionne, mais tres peu de reglage possible. juste des remontées d'info.

18.07.2026

M**C

All good

27.07.2026

H**R

Works no issues

7.05.2026

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R3437

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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