Inverter Batteries

[Dragonten]

Looking for a recommendation on dedicated inverter batteries to get 32volts. Would like the smallest and highest capacity ones. Also curious where you have placed the dedicated bank. I don't have a lot of room in the bildge where Genny is located on my 53MY. Want to get away from using the engine battery bank.

 

[Sadey]

Going through the planning stages now. I’m thinking about putting them on the shelf under my forward stateroom floor in the bilge compartment. It’s well above the water, usually less than room temp and a short distance from my generator room which is the most likely spot for the inverter. Might go lithium. Haven’t decided on that yet.

 

[Dragonten]

I have a set of these wondering if they would work?https://www.ebay.com/itm/2348666389...31a8aef14aae812039bf7&mkrid=710-53481-19255-0

 

[Pascal]

For inverter or house banks it s hard to beat golf cart batteries. For 32v they come in 8v so 4 of them in series give you 32v and 220ah. Parallel more sets for higher capacity

There is quite a bit of space on the 53MY just outside the stringers forward of the main batteries. When I had an inverter on mine, I had 8 of them on port side just forward of the port bank. Back then I used Exide E4800 and got 4 years out of them. Of course that was 18 years ago before big brother decided lead was bad but lithium and cobalt was ok so they costs under $100 each

I know lithium is the big cool thing nowadays, but until lithium compatible fire agents are available I ll stay away. Especially batteries made in china On a 53 space and weight don’t matter much so traditional lead acid work fine

 

[SKYCHENEY]

I disagree. Weight is always an issue. If you run on plane, weight matters. If you only run at hull speed, load up and repaint your water line.

I love running 19kts. It feels like you're running how Hargrave designed it to run.

 

[Pascal]

A few hundred pounds don’t make any measurable difference on plane on a boat that size. I d rather loose 0.2 knots on plane but sleep well at night not worrying about lithium batteries getting hot.

 

[Captain Ralph]

Looking for a recommendation on dedicated inverter batteries to get 32volts.

Do you really need 32V. I luv the ole 32v OutBack units but not made or supported any more.
I use TelCom AGM batteries. Skinny but very tall.
3 x 2 bank makes 24V and last about a day+ with everything (very long list) on but the ACs.
Our inverter can turn on our lil gen-set for recharge and shut down pending state of battery charge automatically.
My project list keeps getting longer. Was planning to ad our stateroom AC to the inverter but have not got to it yet.
Something to ponder.

 

[SKYCHENEY]

A few hundred pounds don’t make any measurable difference on plane on a boat that size. I d rather loose 0.2 knots on plane but sleep well at night not worrying about lithium batteries getting hot.

Weight is cumulative. A few hundred pounds here, another few hundred there. I see boats where owners have added granite counter tops, extra battery banks, spare starters, props, a heavy dinghy, a huge swim platform and a hot tub. Then they wonder why the boat won't get on plane. It all adds up.

 

[Dragonten]

My boats already got a 32Volt Outback installed so trying to stick with what's already there an working. I wonder if one bank of 4 X 8volts would do it?

 

[SKYCHENEY]

My boats already got a 32Volt Outback installed so trying to stick with what's already there an working. I wonder if one bank of 4 X 8volts would do it?

It depends on the batteries and what you need to power. I use my house bank and it works fine with a 3300w Outback. We run any 120v load that we need and it lasts 8-12 hours before I need to start the generator to recharge.

Why go to the extra expense and extra maintenance of another bank if you don't need it?

 

[Captain Ralph]

My boats already got a 32Volt Outback installed so trying to stick with what's already there an working. I wonder if one bank of 4 X 8volts would do it?

Like Pascal typed, Golf Cart batteries are the simplest 32V bank you can put together.
Diode isolate them, then while running your boat, you wont need your gen-set running just to keep the fridge cold.
Continual use and load will dictate the battery bank size without a charge,