12V to 24V DCDC charger

[mihastare]

I decided to use 24V in my next van build for the fact everything is 12V and 24V compatible.

Only DC DC charger (from alternator) I can't find anything except Victron Orion 12/24 - which is overpriced for me

Anyone have 12V car battery and 24V house battery?

Which DC DC are you using?

Thank you

 

[RV8R]

Kisae has a DC2DC 12 to 24

Sterling has 12 to 24

 

[HRTKD]

Make sure you get a charger not a converter.

The Victron Orion line is pretty good.

 

[Zwy]

It would depend on how fast you want to charge and what size alternator. The 12V side will use twice the amps compared to the amps you are charging the 24V side. Watts are the same.

I was considering the Kisae but wanted more amps and my truck easily accepted a second alternator so high amp charging at 24V would not be a problem. The Kisae just didn't have the capacity I wanted and would have required a pair. Instead I opted to use an inverter in the truck to simulate grid power and use the AIO DC charger.

Maybe my video will give you some ideas.

Post in thread 'Here's my truck camper setup'

Jun 12, 2024

Finally did a video showing how I charge the 24V camper system at high amps using the truck 12V system.

• Zwy

• 

 

[HarryN]

The other "technical path" is to use a ( 12 volt inverter ) ---- ( 120 vac charger ) --- battery pack.

Both approaches work. Nominally similar cost to implement.

"Performance costs money".

 

[mihastare]

Make sure you get a charger not a converter.

The Victron Orion line is pretty good.

What is the difference between Charger and converter? Except that converter output usually is 24V which is too low for charging.

 

[HarryN]

What is the difference between Charger and converter? Except that converter output usually is 24V which is too low for charging.

Two significant differences:
- A power supply / converter is designed to output a relatively fixed voltage, and is rated to supply "up to" an amperage / watts output. Pulling too much power can overload it.
- A battery charger is designed to provide multi voltage / current battery charging "stages" that match what the battery charging process actually needs. The output current is self limiting so it can be attached to a very large battery without burning out.

In modern battery chargers, many will also perform some safety checks, for instance some will not turn on unless they are attached to a battery, some have an internal timer in them to run a clock at the same time as the charge process to prevent unlimited charging / over charging.

 

[mihastare]

Two significant differences:
- A power supply / converter is designed to output a relatively fixed voltage, and is rated to supply "up to" an amperage / watts output. Pulling too much power can overload it.
- A battery charger is designed to provide multi voltage / current battery charging "stages" that match what the battery charging process actually needs. The output current is self limiting so it can be attached to a very large battery without burning out.

In modern battery chargers, many will also perform some safety checks, for instance some will not turn on unless they are attached to a battery, some have an internal timer in them to run a clock at the same time as the charge process to prevent unlimited charging / over charging.

Thank you for clarification

 

[HRTKD]

In my camper I use both a charger and a converter as separate units. The 48-12 converter provides constant 12 volt power for the 12 volt side of the camper's loads (lights, stereo, pump, etc). The 12-12 charger keeps the 12 volt battery on the tongue (used to start the generator) charged.

Just throwing that out as an example.