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Jan 23rd, 2013
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Tell me why this wouldn’t work #13682445 08/27/20 03:17 PM
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Chris_K Offline OP
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Hooking up a 1200 watt inverter to the motor battery(only turn on while engine is running)to power the onboard charger for trolling motor batteries.

I’m looking for a cheaper charging solution than a generator.

Moritz Chevrolet - 9101 Camp Bowie W Blvd, Fort Worth, TX - Monte Coon (817) 696-2003
Re: Tell me why this wouldn’t work [Re: Chris_K] #13682466 08/27/20 03:37 PM
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How long are you going to be running the big motor?
I doubt that you will see any benefit running the limited time that most run the big motor. Unless you are at Rayburn or T-bend, most of our lakes just aren't big enough to make a run long enough to charge anything.

Re: Tell me why this wouldn’t work [Re: Chris_K] #13682467 08/27/20 03:37 PM
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Jeff From Iowa Offline
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http://www.stealth1charging.com/#:~:text=Stealth%201%20Charging%20ChargTech%20Industries,power%2C%20and%20Healthier%20batteries%20!!!&text=And%20here%20it%20is%20!!!&text=Stealth1%20gives%20all%20the%20power,the%20batteries%20still%20protecting%20them.

Re: Tell me why this wouldn’t work [Re: Txduckhunter] #13682469 08/27/20 03:38 PM
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Chris_K Offline OP
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Originally Posted by Txduckhunter
How long are you going to be running the big motor?
I doubt that you will see any benefit running the limited time that most run the big motor. Unless you are at Rayburn or T-bend, most of our lakes just aren't big enough to make a run long enough to charge anything.

I’m just trying to come up with a solution for charging during an upcoming camping trip. Hate to buy a generator that I’ll never use

Re: Tell me why this wouldn’t work [Re: Chris_K] #13682473 08/27/20 03:41 PM
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I'm no electrical engineer, but I'm thinking you would need more like 4400 watts for a 4 bank/10amp per bank charger.

40 amp output * 110v = 4400 watts

Re: Tell me why this wouldn’t work [Re: Chris_K] #13682496 08/27/20 03:58 PM
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Jeff From Iowa Offline
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Originally Posted by Chris_K
Originally Posted by Txduckhunter
How long are you going to be running the big motor?
I doubt that you will see any benefit running the limited time that most run the big motor. Unless you are at Rayburn or T-bend, most of our lakes just aren't big enough to make a run long enough to charge anything.

I’m just trying to come up with a solution for charging during an upcoming camping trip. Hate to buy a generator that I’ll never use


sounds like you would use it on the camping trip

Re: Tell me why this wouldn’t work [Re: Chris_K] #13682573 08/27/20 04:55 PM
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hopalong Online Content
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whole lot better deal here.

https://mk.factoryoutletstore.com/cat/20875/Minn-Kota-On-Board-DC-Alternator-Chargers.html

Minn Kota MK-3-DC (3 Bank)
DC Alternator Charger


" Hop, set the hook"!

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lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479
Re: Tell me why this wouldn’t work [Re: Chris_K] #13682736 08/27/20 07:44 PM
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Originally Posted by Chris_K
Originally Posted by Txduckhunter
How long are you going to be running the big motor?
I doubt that you will see any benefit running the limited time that most run the big motor. Unless you are at Rayburn or T-bend, most of our lakes just aren't big enough to make a run long enough to charge anything.

I’m just trying to come up with a solution for charging during an upcoming camping trip. Hate to buy a generator that I’ll never use
Can you just rent one from Home Depot?

Re: Tell me why this wouldn’t work [Re: Chris_K] #13682821 08/27/20 09:00 PM
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Might be tuff to find a generator . Hurricane demand

Re: Tell me why this wouldn’t work [Re: Chris_K] #13682949 08/27/20 10:42 PM
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Just suck it up and buy some 100ah lithiums lol


Originally Posted by Frank the Tank
I hope it’s as big as you say it is Hop. Don’t wanna be disappointed

Re: Tell me why this wouldn’t work [Re: Chris_K] #13683127 08/28/20 02:23 AM
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Your main problem is converted amperage. Your converting 12 volts to 120 volts. a 1:10 conversion. If your A/C charger runs 3 amps charging the 3 batteries, thats 30 amps being pulled off your single cranking battery. Thats why most solar systems use 48 or higher battery setup. Your trolling batteries are hooked up in series but charge in parallel. You would be better to get a DC charger or just hook your motor charger to each battery. But will wear down your alternator faster. I always wanted to make a device like a wind turbine that turned in the water while the boat was moving and would charge the batteries.

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