Battery minder on a generator ?

   / Battery minder on a generator ? #1  

300UGUY

Super Member
Joined
Apr 17, 2004
Messages
5,592
Location
Howell, Michigan
Tractor
Kubota L3400, Farmall H
I am thinking of putting a battery minder on my whole house generator. Can I leave it on while the Jenny is running?

I think I can, but I would like some other thoughts .....
 
   / Battery minder on a generator ? #2  

Industrial Toys

Super Star Member
Joined
Feb 25, 2008
Messages
17,400
Location
Ontario Canada
Tractor
Kubota R510 Wheel Loader + Cab and backhoe, JD 6200 Open Station, Cushman 6150, 4x4, ten foot 56 hp Kubota diesel hydraulic wing mower, Steiner 430 Diesel Max, Kawasaki Diesel Mule, JD 4x2 Electric Gator
I have wondered the same thing. I usually take a charger off prior to starting. The field collapsing on an alternator at shut down can dump a huge spike on the supply.
 
   / Battery minder on a generator ? #3  

RNeumann

Elite Member
Joined
Aug 29, 2016
Messages
4,136
Location
North Idaho
Tractor
Mahindra 1538
Any of the “smart” chargers will work fine. The charger must be able to “sense” the voltage and adjust charge rate. The generator running won’t affect the charger, battery or the generator charging system.
 
   / Battery minder on a generator ? #4  

Industrial Toys

Super Star Member
Joined
Feb 25, 2008
Messages
17,400
Location
Ontario Canada
Tractor
Kubota R510 Wheel Loader + Cab and backhoe, JD 6200 Open Station, Cushman 6150, 4x4, ten foot 56 hp Kubota diesel hydraulic wing mower, Steiner 430 Diesel Max, Kawasaki Diesel Mule, JD 4x2 Electric Gator
My only thought is the charger being destroyed. If I kept one in circuit all the time, I would probably put a fuse close to the battery. If your charger shorted out, you don't want the energy available in the battery to set the whole thing on fire.
 
   / Battery minder on a generator ? #5  

RNeumann

Elite Member
Joined
Aug 29, 2016
Messages
4,136
Location
North Idaho
Tractor
Mahindra 1538
The smart chargers typically have circuit protection. You can hook them up backwards and all they do it tell you they are hooked up wrong.....no damage!
 
   / Battery minder on a generator ? #6  

Industrial Toys

Super Star Member
Joined
Feb 25, 2008
Messages
17,400
Location
Ontario Canada
Tractor
Kubota R510 Wheel Loader + Cab and backhoe, JD 6200 Open Station, Cushman 6150, 4x4, ten foot 56 hp Kubota diesel hydraulic wing mower, Steiner 430 Diesel Max, Kawasaki Diesel Mule, JD 4x2 Electric Gator
I know. I seem to have brain damage and often hook things up with only two ways of hooking up, the right way and the wrong way, backwards after telling myself I won't. Did that a few days ago (again) on my generator battery with a maintainer. A nice spark told me, immediately, I had messed up. To my amazement, the charger still worked!

I have had a few five hundred dollar Zantrax chargers that are supposed to be OK with reverse polarity, and I destroyed them!
 
Last edited:
   / Battery minder on a generator ? #7  

coobie

Super Member
Joined
Sep 19, 2004
Messages
6,361
Location
S.Michigan
Tractor
Kubota RTV 1100c, JD 740,Kioti DK 40 with KL401 loader .
Not all battery tenders/minders are created equal.Google Ctek model multi US 3300.
 
   / Battery minder on a generator ? #8  

Gunny

Veteran Member
Joined
Dec 22, 2005
Messages
1,517
Location
IN, KY
Tractor
B2920, D1850FD
I've got one of these mounted under the hood of my truck to keep the two batteries topped up enough to spin that diesel engine. (I don't drive it much in cold weather and parasitic losses drag them down after a week or so of sitting)

This one has never had any problems with the engine running or with the surge from the batteries from the glow plugs and cranking the starter.

https://www.amazon.com/Battery-Tend...id=1541928732&sr=1-12&keywords=battery+tender
 
   / Battery minder on a generator ?
  • Thread Starter
#9  
OP
300UGUY

300UGUY

Super Member
Joined
Apr 17, 2004
Messages
5,592
Location
Howell, Michigan
Tractor
Kubota L3400, Farmall H
I went ahead and hooked it up, started the genny, and no problems. It is a battery minder brand. Makes me feel good to see the green light telling me that it is charged up!
 
   / Battery minder on a generator ? #10  

reb

Platinum Member
Joined
Mar 18, 2002
Messages
994
Location
Central Arizona
Tractor
YM1500D
I built a solar charger for my backup generator. Seems to work well. I hadn't started the generator for a couple of months or more and it started without a problem when the power went out a couple of days ago. It stays connected all the time. Running the generator does not affect the charger.
 
 
Top