What is a genny required for?

CRay45DB

Petty Officer 2nd Class
Joined
Aug 7, 2011
Messages
112
Re: What is a genny required for?

I'm looking at cruisers in the 26-30' range (Four Winns 288, SeaRay 260/280, etc) and see some with and some without Genset. I'm assuming that all boats in this class have an inverter, so, except for the obvious ("run something all night without running an engine) what else requires a Genset to use away from shore power?

For example, can I run AC on a boat like this off an inverter? What about the microwave? If I'm going for quick jaunts, any reason I can't just get some extra deep cycle batteries and forgo the expense of having another engine to worry about?

My primary use of 110V power would be the microwave/TV and perhaps AC.

Any experience/guidance offered will be much appreciated ("I have a 28' cruiser, and would be very unhappy if I didn't have a genny because .....").

Thanks!

Well, let me see if I can sum it up for you. I have a 44' SeaRay with the sweet smell of Diesel, but before that many a gas. Here are some key points. Unless someone installed invertors, you don't have them. The question is what do you do with your boat? Do you want to leave Friday night and come back Sunday night staying on the hook? You also have to remember your refrigerator and stuff are running off of house batteries too before you plug in the vacuum cleaner and microwave. There are a lot of options out there, and not a big fan of inverters, even though I have them because I put them in, it just sucks when your batteries are dead. Yes, try and get a boat with the GenSet built in. It's just cleaner and easier. If you don't we have seen many people with the little honda generators on the back of the ski platform. They work great, but when it comes to bed time, gas my ***! You need CO2 detectors regardless. There is always someone close buy running there GenSet. Every year we have fatalities because people go to sleep with their gas gens on. It really bothered me when the dog died too. You want to sleep with it? Buy a diesel. Yes, there are new ones that have greatly reduced CO, but gas also explodes, now don't everyone give me a lecture on how safe gas is. Something about Maryland. Gas boats like to explode and burn to the water line.

On all my boats, I have converted the house batteries to 6 volt golf cart batteries, 2 tied together to give me a monster 12 V house battery. I think someone mentioned it. You have to have the room, but then again, we anchor out from Friday to Monday. Lots of beer to keep cool.

Bottom line, buy the boat with how your going to use if if possible if you don't have the expertise to upgrade it. Where we boat, the water is 90+ in the summer, so a/c is not a luxury, its basic need. A genset is just a great thing to have, you will love it.

Good luck!
 

oops!

Supreme Mariner
Joined
Oct 18, 2007
Messages
12,932
Re: What is a genny required for?

long story short? all things being equal.....

if you are on the hook for 48 hours.....and have a fridge....coffie maker a/c and a microwave.....you need a genny.
even if you had a bank of 6 volts....and a big honkin inverter....i dont think you could run the a/c for the weekend with out draining the bank
 

Fireman431

Rear Admiral
Joined
Sep 17, 2007
Messages
4,292
Re: What is a genny required for?

What is a genny required for?

A/C & heat (we boat in the winter as well)
Microwave
TV
DVD player
Video game console (for the kids at night)
Coffee maker
Water heater
Electric range top
Plus anything you might want to plug into the 110v outlet (lap top, cell phone charger, portable fan, etc)

If you use your boat more than 6-8 hours at a shot, get a genset. Very reliable and minimum maintenance. They're designed to run for long periods. As far as the gas vs diesel debate, that's been ongoing for years. I have a gas genset with 400+ hours on it. My brother has a gas genset, my friends have gas gensets. No explosions. Diesel is less violatile, but you'll want to run the fuel supply for the genset off of your main boat fuel tank, so match what ever fuel you're running. Gas & diesel both put out the same Carbon Monoxide exhaust, so CO detectors are must (and the law). In fact, even if you never bother to get a genny (but plan on sleeping on the boat), put the CO detectors in anyway. You never know who is going to motor in next to you at 2:00 am. You want to make sure you're able to get vertical in the morning.
 

cyclops2

Banned
Joined
Apr 19, 2011
Messages
1,237
Re: What is a genny required for?

Fireman 431

Thank you for such a simple & factual reason for using a generator for power with the main engine off.


SERIOUS possible danger with any battery setup. During recharging. There is the same danger in a surface boat as in a submarine!!!!!!!

The breakdown of water into Hydrogen & Oxygen gases..............VERY VERY powerfull & hot explosions. .........Positive ventilitation is a MAXIMUM WORRY !!!!!!!!!!!!!

GET THOSE GASSES OUT OF THE BATTERY AREAS AS FAST AS THEY OCCUR !!!!!!!!!!!!!!!!!! A loose or corroded battery cable connection arcing will have enough power to cause a explosion.

Those cute bubbles at the trickle charge end, are the begining of the Hydrogen & Oxygen bomb. GET THEM OUT OF THE BOAT.

Since the bubble voltage varies with age & other conditions, not much can be done except to FORCEABLY remove them, with a exhaust fan that runs any time RECHARGING IS STARTED.

Golf carts, cars, trucks, airplanes all USUALLY have enough air movement to dilute the bomb mixture.

Take care on installing battery groups in a confined space.
 
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