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Victron 48 volt system with Safiery 48 volt Li-Ion |
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460AUS 
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Joined: 21 June 2024 Status: Offline Points: 46 |
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 Topic: Victron 48 volt system with Safiery 48 volt Li-IonPosted: 20 October 2024 at 01:03 |
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Hi All,
My H460 arrives in March 25, and the local dealer/ Hanse are unsupportive of a 48 volt solution for solar/house batteries. We have a Qld based battery and electrics genius who sells a Victron based 48volt system that works with his own IP66 48 volt batteries and a device called “Scotty” that tunes your existing alternator and a temperature sensor with an AI. They have successfully installed over 200 of these systems in Rv’s and 50 in marine applications. First time for a Hanse and they have resisted firmly. The 48 volt system proposed is a games changer and will become I expect the norm in ten years time. It saves a fortune on inverter chargers and MPPT’s even the wiring is smaller and cheaper. Both Hanse and the local dealer have only proposed 12 volt systems, almost like their heads are in the sand. I have tried locally to no avail, feeling perhaps that Hanse is restricting them because of the fire issues with Li-ion. Has anyone had success in dealings with Hanse on “new” concepts like this? Perhaps an electrician contact in Germany? Cheers J
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Arcadia
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Joined: 27 November 2017 Location: Sag Harbor, USA Status: Offline Points: 1112 |
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Posted: 20 October 2024 at 02:27 |
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How would they propose to operate all the 12 volt devices installed on the boat on a 48 volt bank ??
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Leon / ARCADIA
2018 Hanse 588 Sag Harbor, NY |
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460AUS
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Joined: 21 June 2024 Status: Offline Points: 46 |
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Posted: 20 October 2024 at 02:43 |
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Easy peazy.
It’s the same question the local agent asked. And they could not fathom the answer. The 48 volt bank is connected to the Victron Lynx distributor which passes through to the Viltron Smart battery protect which is connected to 12v loads. Alternatively the battery train can have a “Scotty AI” which has a 12 volt output. Once connected to the 12v loads nothing changes. 48 volts have one quarter the amps for the same power so wires are skinny devices are smaller too.
The systems are not cheap but 48 volt devices but the costs in halfish. Victron marine have circuit diagrammed that spell it out Cheers J |
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marsella
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Joined: 21 June 2022 Location: Antigua Jolly H Status: Offline Points: 592 |
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Posted: 20 October 2024 at 04:12 |
Lynx Distributor is a couple of copper bars and some fuses, and the battery protect is the circuit breaker, how the voltage steps down from 48 to 12 in this sequence?
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460AUS
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Joined: 21 June 2024 Status: Offline Points: 46 |
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Posted: 20 October 2024 at 05:16 |
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I am not an electrician.
You can look up the specifics on the Victron site. They have a marine brochure. It is one of the last diagrammes that covers shore power generator and solar.
It is a simple concept that should be self evident in the circuit diagrammes. Cheers J |
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marsella
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Joined: 21 June 2022 Location: Antigua Jolly H Status: Offline Points: 592 |
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Posted: 20 October 2024 at 06:05 |
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You can easily get 48 to 12V converter but those are low power devices. The boat wiring is done wih the idea to carry large loads, 1kW for anchor windlass, 1kW for winches, and so on. If you sum all this, the max load could go up to 5kW, thats why wire gauge is 400A at the batteries. Assuming we are not replacing anchors and winches, you will likely want to keep the same power ratings, therefore you will need 48 to 12V converter rated at 5kW
 . Not even sure the industry makes those. RVs dont have these problems, hence life is much easier.
Edited by marsella - 20 October 2024 at 06:12 |
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Arcadia
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Joined: 27 November 2017 Location: Sag Harbor, USA Status: Offline Points: 1112 |
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Posted: 20 October 2024 at 15:35 |
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My point was exactly as Marsella describes. All the 12 volt amps and wires will be unchanged and you would have a hard time converting the 48v down to 12v in the process. There would also be heat losses as well. The only advantage I can see would be on the charging side of the equation. But again, it would require all dedicated 48v chargers and alternator.
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Leon / ARCADIA
2018 Hanse 588 Sag Harbor, NY |
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460AUS
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Joined: 21 June 2024 Status: Offline Points: 46 |
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Posted: 20 October 2024 at 21:12 |
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The problems that you are anticipating do not exist.
If you look at the circuit diagrammes nothing needs to be changed in the 12v loads, nothing. Bow thruster batteries, and engine battery are unchanged. Over 50 boats have this system running today. You have to approach this laterally. The 48 volts are only for solar, inverter charger, house batteries that’s it. Thank you for raising your issues, as they are the same ones the agent raised. If it doesn’t gel, and you’re interested in understand why, then visit Victron and Safiery web sites. I see the change is similar to when tyres went from cross-ply to radial construction when lots of smart people opposed the change. Cheers J
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marsella
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Joined: 21 June 2022 Location: Antigua Jolly H Status: Offline Points: 592 |
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Posted: 20 October 2024 at 22:04 |
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Problem with this is when you mention house batteries because winches and windlass are powered from there and if you wire 4 12V batteries in series to get 48V (you just need 4 batteries and a piece of wire, right?) you will need to step down the voltage back to 12. Solar is usually not a problem at all, their currents are small anyway. If you want a powerful 5kW something inverter, 48V setup will help but I am not sure what application needs 5kW inverter. At the end if you really need 5kW interter you can also wire the inverter to bow thruster batteries, those are usually connected in series to deliver 48V since bow thrusters take 7kW or more.
Edited by marsella - 20 October 2024 at 22:05 |
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mr-ludi
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Joined: 25 September 2022 Status: Offline Points: 152 |
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Posted: 21 October 2024 at 08:30 |
How many watts can you use in your 12V system?
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460AUS wrote: