Field test: PV Modules

A real world comparison between Mono, Poly, PERC and Dual PV Modules.

Total solar yield: --
Total solar yield: --
Total solar yield: --
Total solar yield: --
Total solar yield: --
Total solar yield: --
Installation date: 09-03-2020

* This is a field test and the results are specific for this installation on this location please research which is the best solution for your own situation as the results can be different based on environmental influences.

Total solar yield as of 27/03/2023 when the results were reset:
Mono: 9158 kWh
Split-cell: 9511 kWh
Poly: 9113 kWh
Perc: 9471 kWh
Perc-east: 1970 kWh
Perc-west: 1730 kWh

Raymarine & Victron integration video

Winter upgrades to sailing yacht Pilgrim

It’s that time of year in the UK, when many a boat is hauled out and their owners upgrade and maintain their systems.

Victron video

Victron video producer Jonathan Cecil recently took a trip to Whitehaven Boatyard in Cumbria to see what such owners, Victron dealers and installers get up to over the winter period – and in so doing produced the fascinating video embedded later in this blog.

Upgrade brief

In this instance the brief, to Victron specialist Chris Dobson of UK Marine Electronics Ltd., was a full Victron and Raymarine upgrade for sailing yacht Pilgrim, including a lithium battery system, upgrading Victron power systems and integrating them with a new Raymarine MFD.

Pilgrim prepares for her winter haul-out

Pilgrim was built on the Hamble in 2002, is 32′ LOA, planking construction and sheathed in epoxy – making for a heavy displacement, stable vessel.

Raymarine integration

This very useful upgrade with the advent of Victron’s latest Venus OS for their GX devices and the release of Raymarine’s latest Lighthouse software, means that users can view the status of Victron equipment on their Raymarine MFD.

A Venus GX is device is able to communicate with the Raymarine Axiom Multi Functional Display (MFD) either directly or through a network router, via the Ethernet port and a RayNet adapter.

Upgrade components

Raymarine Equipment

Click image to download PDF schematic

The Raymarine Equipment is connected together with NMEA 2000 / SeaTalkng.
In this installation the Victron Venus GX is connected to the Axiom MFD via Ethernet with the Raymarine RayNet Female to RJ45 Male Cable adapter.

It is also possible to connect all the Victron components to a Venus GX device, and have that connect to NMEA 2000 as well, providing yet another way to display your power system information on your boat’s Multi Functional Display/s.

Victron Equipment

Click image to download PDF schematic

Video – Raymarine & Victron Integration

Learn more – MFD integration for Raymarine and other brands

For the full documentation about MFD and NMEA 2000 integration, please see the following.

The main NMEA 2000 & MFD integration guide
Integrating with GX Devices

For MFD App-type integration:

For NMEA 2000 integration:

Lithium cold charging issue

Chris Dobson (seen in the video above) loves problems and is very keen to solve them, especially ones such as – lithium don’t like to be charged below 5C. This being an issue, Chris thought outside the box and used the resistance properties of a Venus GX to measure the temperature of the battery box, which in turn controlled a relay.

Chris used a PT100 temperature probe inside the battery box, between the batteries, which is a resistance probe. As the Venus GX uses resistance for its tank levels, Chris used this to control one of the Venus GX relays. This, in turn, controlled a 12v Coil VF4 SPDT relay to turn a 12V 30W heat pad on/off, that was placed under the batteries. Whilst not included in the video, Chris also insulated the battery box and added some strips of ply to form an air gap between the heat pad, aluminium sheets and the batteries – so they weren’t just sitting on the heat source.

For additional info see this blog by Chris Dobson:

When is a Battery Cold?


Apart from the innovative solution for ensuring lithium batteries are charged correctly when it’s cold outside, it’s great to see how well Victron GX devices now integrate with Raymarine MFDs. A winning combination for many boat owners, I suspect.

For any technical discussions regarding this blog (rather than using Disqus below) please see this thread on the Victron Community:

John Rushworth


Installer – Chris Dobson for UK Marine Electronics Ltd., who are a Victron Dealer in Whitehaven, Cumbria and offer marine, off-grid & backup, energy storage and support.

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