Victron VE.Direct to RS232 Interface Cable
Victron VE.Direct to RS232 Interface Cable
Galvanic Isolation for Noise-Free Data - DB9 Female to VE.Direct

DESCRIPTION
Victron VE.Direct to RS232 Interface: Reliable Data Communication for Energy Monitoring
Seamless Connectivity Between Victron Devices and RS232 Hosts
The Victron VE.Direct to RS232 Interface (part number ASS030520500) enables direct, galvanically isolated communication between Victron products with a VE.Direct port and any RS232-compatible host, such as a PC, PLC, or industrial controller. This cable is essential for system integrators, off-grid installers, and marine electricians who require stable, interference-free data transfer for monitoring and control.
Unlike generic USB-to-serial adapters, this interface provides galvanic isolation between the VE.Direct device and the host, protecting sensitive electronics from ground loops and voltage transients. This is particularly valuable in mobile and marine environments where electrical noise and potential differences can corrupt data or damage equipment.
Engineered for Industrial and Mobile Applications
The interface draws power from the VE.Direct port on one side and from the RS232 DTR and RTS pins on the other, eliminating the need for an external power supply in most setups. A wide auxiliary voltage range (5 V to 12 V DC) offers flexibility for custom installations. The moulded housing protects the internal logic-level shifter, ensuring long-term reliability in harsh conditions.
With a fixed baud rate of 19200, 8 data bits, no parity, and 1 stop bit, the interface is pre-configured for Victron’s standard communication protocol, simplifying setup. The DB9 female connector uses pins 2, 3, and 5 for TX, RX, and GND, while pins 4 (DTR) and 7 (RTS) must be driven high to power the isolated side—a detail clearly documented for straightforward integration.
Key Features
- Galvanic isolation prevents ground loops and protects connected equipment
- Plug-and-play with Victron VE.Direct devices—no driver installation required
- Robust moulded enclosure withstands vibration and moisture in mobile and marine settings
- Bus-powered design draws from VE.Direct and RS232 handshake lines, no external adapter needed
- Standard DB9 female connector for direct connection to legacy RS232 ports
Applications
This interface is ideal for:
- Connecting a Victron BMV battery monitor or MPPT solar charger to a PC for data logging and firmware updates
- Integrating Victron devices into industrial control systems using RS232
- Marine and RV installations where isolation is critical to prevent corrosion and signal errors
- Remote monitoring setups requiring reliable serial communication over longer distances than USB allows
Why Galvanic Isolation Matters
In systems where multiple power sources and grounds exist—such as a vehicle chassis, solar array, and shore power—ground loops can introduce noise, measurement errors, and even hardware damage. The built-in isolation in this interface breaks those loops, ensuring accurate data from your Victron equipment and extending the lifespan of connected electronics.
Get Reliable Data from Your Victron System
Add the Victron VE.Direct to RS232 Interface to your toolkit today and ensure clean, protected communication between your Victron devices and RS232 hosts. Whether you're commissioning a new off-grid system or upgrading an existing installation, this cable delivers the dependable performance professionals expect.
SKU: VIC-ASS030520500
SPECIFICATIONS
Specifications
| Official Product Name | VE.Direct To RS232 Interface |
|---|---|
| Victron Part Number | ASS030520500 |
| Interface Type | VE.Direct To RS232 |
| Isolation | Provides Galvanic Isolation Between The VE.Direct Product And The Host |
| Baud Rate | 19200 |
| Data Bits | 8 |
| Parity | None |
| Stop Bits | 1 |
| Flow Control | None |
| DB9 Communication Pins | Pin 5, 2 And 3: GND, RX And TX |
| DB9 Power Pins | Pin 4 DTR And/Or Pin 7 RTS Must Be Driven High To Power The Isolated Side Of The Interface |
| External Power Supply Voltage | Minimum 5 V, Maximum 12 V |
| VE.Direct Side Power | Powered From VE.Direct |
| RS232 Side Power | Takes Its Power From The DTR And RTS Pins |
| SKU: | VIC-ASS030520500 |
| Barcode: | 8719076019565 |
| Model #: | ASS030520500 |
| MPN: | ASS030520500 |
WARRANTY
Victron Energy Limited Warranty Policy
Direct Customers
Victron Energy provides the following warranty to any direct customer (OEM, distributor or dealer) in relation to any products that Victron Energy has directly sold to the direct customer. This warranty is not an end-user warranty between Victron Energy and an end-user, and end-users shall not have any rights or remedies under this limited warranty towards Victron Energy directly. The direct customer shall, in turn, ensure that the end-user is provided with a warranty identical to this warranty, subject to applicable local mandatory law.
End-Users
Victron Energy may also provide a warranty directly to end-users, in which case the below warranty conditions equally apply to such warranty. In that case, end-users shall claim their warranty at their place of purchase or through the original direct customer of Victron, which can be found through the support section on Victron’s website https://www.victronenergy.com/support. Hence, the direct customer shall on behalf of Victron Energy deal with any warranty claims made under any warranty that Victron Energy may provide directly to end-users. This support section on Victron’s website https://www.victronenergy.com/support will provide further guidance on the procedure for end-users to make a claim under this limited warranty.
If the end-user is a consumer – a natural person who is acting for purposes which are outside that person's trade, business, craft or profession – the following applies. The rights and remedies granted to the consumer under this limited warranty are without prejudice to the consumer’s statutory rights. Furthermore, the consumer is entitled by law to remedies from the seller free of charge in the event of a lack of conformity of the goods (such as repair, replacement, price reduction or rescission), which remedies are not affected by this limited warranty.
Warranty
Victron Energy warrants its products to be free from defects in workmanship and materials for a period of 5 years from the date of purchase by the original end-user, with a maximum of 66 months from the Victron Energy invoice date. Exceptions on this are: lead-acid batteries: 2 years from date of purchase by the original end-user, with a maximum of 30 months from the Victron Energy invoice date, Lithium batteries: 3 years from date of purchase by the original end-user, with a maximum of 42 months from the Victron Energy invoice date. In addition to this, proof of correct battery usage is required when making a battery warranty claim.
For a 10% surcharge on the current net price for products that came with a 5-year warranty, an additional 5 years of warranty can be purchased by Victron’s direct customers, bringing the total warranty to 10 years. Warranty extensions need to be applied for ultimately one year before the expiration of the original term. Victron may ask proof that the product was still functional at the time of purchase of the extended warranty.
During the warranty period, Victron Energy will, at its discretion, repair, replace or (partly) credit the defective product free of charge. The warranty does not include performing or reimbursing de‐installation, transportation, and re‐installation.
This warranty will be considered void if the unit has suffered any physical damage or alteration, either internally or externally, and does not cover damages arising from improper use like:
- Reversed battery polarity.
- Inadequate connection.
- Mechanical shock or deformation.
- Contact with liquid or oxidation by condensation.
- Use in an inappropriate environment (dust, corrosive vapour, humidity, high temperature, biological infestation, etc.).
- Breakage or damage due to lightning.
- Connection terminals and screws destroyed or other damages, like overheating, due to insufficient tightening.
- For any electronic breakage except due to lightning (reverse polarity, over‐voltage due to external cause), the state of the internal control diode and/or the input/output X and Y capacitors determine the warranty.
This warranty will not apply where the product has been misused, neglected, improperly installed, or repaired by anyone other than Victron Energy or one of its authorized Repair Centres. In order to qualify for the warranty, the product must not be disassembled or modified.
This warranty and our warranty obligations thereunder (repair, replacement or credit) are the direct customer’s and, if applicable, the end-user’s sole rights and remedies and our sole obligations with respect to any defective and/or non-conforming product or breach of warranty and is subject to and without prejudice to the limitations of liability in this warranty.
Victron Energy shall not be liable for damages, whether direct, incidental, special, or consequential, even caused by negligence or fault.
As a product requires service, it must be brought back to the place of purchase. In case no contact can be made with the merchant, or if he is either unable or not allowed to provide service, direct contact should be made with Victron Energy through the support section on Victron’s website.
In case Victron Energy replaces a product, it will own the replaced product. Victron Energy owns all parts removed from repaired products. Victron Energy uses new or reconditioned parts made by various manufacturers when performing warranty repairs or building replacement products.
If Victron Energy repairs or replaces a part of a product, its warranty term is not extended: the warranty will apply for the remaining term of the original warranty term. For example, if Victron Energy replaces a product with a 5-year warranty after 3 years, the warranty of this product will apply for another 2 years, with a minimum of 6 months.
All remedies and the measure for damages are limited to the above. Victron Energy shall in no event be liable for consequential, incidental, contingent or special damages, even if having been advised of the probability of such damages.
The foregoing limited warranty provided by Victron Energy is in lieu of any other warranties, express or implied arising by law, course of dealing, course of performance, usage of trade or otherwise, of any kind whatsoever including, without limitation, warranties of merchantability or fitness for a particular purpose, with respect to any product. The above is without prejudice to the arrangement for consumers detailed above.
Life Support Policy
As a general policy, Victron Energy does not recommend the use of any of its products in life support applications where failure or malfunction of Victron Energy's product can be reasonably expected to cause the failure of the life support device or to significantly affect its safety or effectiveness. Victron Energy does not recommend the use of any of its products in direct patient care. Victron Energy will not knowingly sell its products for use in such applications unless it receives in writing assurances satisfactory to Victron Energy that the risks of injury or damage have been minimized, the customer assumes all such risks, and the liability of Victron Energy is adequately protected under the circumstances.
Warranty on repairs for products outside their warranty period
The warranty period on products that are outside their warranty period and have been repaired by Victron Energy or one of the Victron Energy Repair centres is six (6) months from delivery. The same applies to spare parts and circuit boards that have been supplied or repaired by Victron Energy.
Transport
It is the responsibility of the sender to sufficiently package these products. The transport must be organized in a way to avoid any damage, especially when a single unit or heavy unit is sent.
Severability
If a part of the terms and conditions of this warranty is held invalid, void or unenforceable due to any particular national or international legislation, it shall not affect other parts of the terms and conditions of this warranty.
Applicable law
This warranty is exclusively governed by the laws of the Netherlands, to the exclusion of the UN Convention on Contracts for the International Sale of Goods.
Contact details
Victron Energy B.V. | De Paal 35, 1351 JG Almere, The Netherlands | https://www.victronenergy.com/support














































