Hello, I’m a beginner at this so don’t roast me too hard. I want to install the system in my new boat. It´s pretty simple. I want a 24V lithium for my trolling motor and 12V for my sonars and other stuff. I want my Honda 150 hp outboard to charge everything with two DC/DC chargers. I also want to charge everything at home with a Victron 25A charger.
Does everything look as it should? Is anything missing, and what fuses do I need between the DC/DC chargers and batteries?
Looks OK in terms of functionality.
The Orion manuals contain information about fuse and wire sizes. The combined 40A fuse on the supply to the Orions may not be high enough. Consider a separate fuse for each Orion otherwise you need larger cable supplying both. The fuses on the output of the Orions should be fitted next to the lithium batteries.
The resettable breakers you have shown, I use fuses not breakers. The type you show are often low cost and unreliable unless you buy genuine Blue Sea or other quality brand.
Are you planning on using the Victron Lithium Smart batteries or have you just used the picture. This type of battery needs an external BMS, the Victron Lithium SuperPack would be better for your use.
Thank you. What fuse do you think would be sufficient for both orions? And is a fuse on the output really necessary?
I´m planning to use victron chargers with Li timebatteries actually. They have built in BMS and are heated. I have not used lithium batteries in a system like this before so I´m not sure what the BMS have to do and if the BMS in Li timebatteries are sufficient.
The Manuals will have details of recommended fuses so see what they say and add it together.
Yes, you do need an outlet, the main purpose of a fuse is to protect the wiring from overheating if there is a short circuit and you have a battery connected to the outlet that could flow current backwards so you need to protect the wire from the Orion outlet to the battery, which is why the fuse needs to be at the lithium battery.
The Litime batteries with there internal BMS will provide shutdown protection if there are any problems such as over voltage.
Thank you! One last question, is it a problem to charge from the 25A charger at home and still have it connected to the outboard engine like in the image above?
I do not think it should be an issue, it is just like the battery being connected with a little higher voltage. My boats starter battery gets charge while still connected. However, the answer is not definite as I do not know the exact details of the engine.
