R23 Battery Load Diagram

[OlygirlNav]

As a recent owner of the R23 Outboard I put together a simple battery load diagram to help determine if the 2 90AH house batteries were sufficient for staying on mooring buoy for two nights. The conclusion is Yes, if only have the refrigerator running with lights, water pumps and stereo on as needed. Based on one time the measured voltage with 12.189V which translates to approximately 50% charge remaining. I have asked to have the diagram posted similar to the GarminCheatSheet.

Why 2 nights? Basically the holding tank is the limiter. With 11 gal then expect to have to pumpout after two days of use.
Why no heater included? Two reason, not enough data yet. And if out during cooler days will most likely stay at someplace with shore power. If for some reason I want to run the heater I would consider adding an additional house battery so there would be sufficient power and not drain the batteries below 80% of rated charge.

I did find a really good website ( http://www.batteriesinaflash.com/deep-cycle-battery-faq ) that answers lots of questions regarding Deep Cycle battery. I am using this a reference.

Cool Mint does not have a Solar Panel so that is not shown as well as the fuses and relays. Hence the title "R23 Battery Load Diagram" not a schematic that would have essentially these items.

Hope this helps you in your cruises away from the dock.

 

[baz]

Replace those two house batteries with Lithium batteries. If you do this you most likely will need to change battery charger configuration to deal with Lithium battery charging requirements.

The Lithium batteries can be discharged down to around 10% without harming them and will save some boat weight as well which should translate to lesser fuel burn.

You mentioned "heater".... what type of heater are you referring to ? The Webasto forced air heater maybe ? If so, it uses little electrical energy.

...or you could add an additional house battery.

Yea.... the 11 gallon holding tank is a bummer.... 😉 :lol: Even on my new R-27/OB its a 30 gallon tank which has to be monitored closely with my Flow Rite flow meter I had installed.

 

[Bruce Moore]

You'll find the diagram prepared and shared by OlygirlNav here. Click the thumbnail to view.

Cheers,

Bruce

 

[OlygirlNav]

Thank-you Bruce.
I found the thumb nail hard to read but was able to read just fine when opened the file by double clicking.

 

[oneeyedjackass]

Thanks! How do you monitor voltage. I've been thinking putting something in to keep tract

 

[OlygirlNav]

I do not have a way to monitor the voltage. I turned off the house battery switch and measured across the terminals of the house batteries. If you have ideas for DC voltage monitoring please share.

 

[Red Raven]

I installed a Xantrex Link Lite battery monitor. Love it! Measures volts, amps, amp hours, percent capacity remaining.

Curt