Battery-charging while connected to TT

[Ohiofinlander]

We are getting ready for a 5 night dry camping trip. I'm thinking about taking my Schumacher battery charger, and running it off the generator for an hour each day to maintain a good battery charge. Is this a bad idea with the battery still being connected to our TT system? I wasn't sure if there would be any backfeeding to the system that would cause damage. I'm thinking the external charger would be faster than the built-in charger. Thanks in advance.

[Vicr]

Yes, you would be back feeding into your converter and as an electrician I personally would not do it. I would add a battery disconnect switch or disconnect the positive lead off the battery while charging.


I see you're a PM at a concrete precast factory, ask the plant electrician about back feeding DC into electrical components designed for outputting a lower voltage DC.

[Ohiofinlander]

Originally Posted by Vicr

Yes, you would be back feeding into your converter and as an electrician I personally would not do it. I would add a battery disconnect switch or disconnect the positive lead off the battery while charging.


I see you're a PM at a concrete precast factory, ask the plant electrician about back feeding DC into electrical components designed for outputting a lower voltage DC.

Thanks for the explanation.

[RogerR]

Your campers built in system should charge at a good rate. Maybe 10 amps an hour. Enough for a few lights and water pump but not for any furnace running, tv or microwave, etc. use.

[Ohiofinlander]

Originally Posted by RogerR

Your campers built in system should charge at a good rate. Maybe 10 amps an hour. Enough for a few lights and water pump but not for any furnace running, tv or microwave, etc. use.

I didn't realize the Amp output was that high. That matches my external charger, so it's a no brainer to use the internal charger. Thanks

[JimD]

Doesn't your rig have a converter? If so these typically can charge from 30 - 100 amps, depending on model. I assume your charger you want to use is not the rolling cart high amperage version so it may only put out 10 - 20 amps. Might as well just leave charging to the converter.

As far as two charging sources at once, I am not an electrician. I can only say that I do not have any noticeable problem when I have shore or generator power running my 60 amp converter with my 400 watt solar system charging at the same time. I have no idea how they work together but the end result is my 2 batteries are charged. You would think they would conflict.

[Jagiven]

My tt converter does great job charging my battery. Usually I just need an hour or so genny time in the morning and again at night.

I do carry a multimeter and monitor my voltage, before and after charging.

[Ohiofinlander]

Originally Posted by Jagiven

My tt converter does great job charging my battery. Usually I just need an hour or so genny time in the morning and again at night.

I do carry a multimeter and monitor my voltage, before and after charging.

Yes, thought I would get a multi meter to see how it does sometime. Thanks for all the feedback everyone.