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DC to DC Charger

Started by seren, November 25, 2021, 01:49:45 AM

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seren

November 25, 2021, 01:49:45 AM
Anyone uses a DC to DC charger for the dual battery setup? It needs an ignition wire connection (12v when the motor is running?). I'm interested to see how one wires it.

DevMah

#1
November 25, 2021, 10:00:00 AM Last Edit: November 25, 2021, 10:16:09 AM by DevMah
Any reason why you would run a DC to DC charger on a small boat? are you using lithium batteries ?
Why not just a ACR or DVSR?



IMO
Expensive and overkill.
Most smaller outboards don't charge past 50A... Usually this is more used in inboards with larger charging output.


DVSR
https://www.marinco.com/en/p/710-140a

ACR

https://www.bluesea.com/products/7601/m-Series__Automatic_Charging_Relay_-_12_24V_DC_65A


Dev
2015 21' Sea Ranger w 150 Yammy  (Tight lines) Sold
2012 Lund 1650SS  w 2012 60HP Mercury-Sold

DevMah

#2
November 25, 2021, 10:02:15 AM
Quote from: seren on November 25, 2021, 01:49:45 AM
Anyone uses a DC to DC charger for the dual battery setup? It needs an ignition wire connection (12v when the motor is running?). I'm interested to see how one wires it.

If you do go this route you just connect into the ACC out of the start switch.

Dev
2015 21' Sea Ranger w 150 Yammy  (Tight lines) Sold
2012 Lund 1650SS  w 2012 60HP Mercury-Sold

seren

#3
November 25, 2021, 11:17:43 AM
Thank you for the responses. I was looking for an ACR solution, then I found the DC to DC charger. There's a Renogy 20A DC to DC charger that sells for $86 on Amazon. And yes, I want to use Lifepo4 battery at least as the house/backup battery.

DevMah

#4
November 25, 2021, 08:23:35 PM
Quote from: seren on November 25, 2021, 11:17:43 AM
Thank you for the responses. I was looking for an ACR solution, then I found the DC to DC charger. There's a Renogy 20A DC to DC charger that sells for $86 on Amazon. And yes, I want to use Lifepo4 battery at least as the house/backup battery.

Ok understood if using Lifepo4 as your house.
FYI
Usually install the DC to DC chargers in dry low moisture areas.



Dev
2015 21' Sea Ranger w 150 Yammy  (Tight lines) Sold
2012 Lund 1650SS  w 2012 60HP Mercury-Sold
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