2021 jayco greyhawk 29mv

[anf76]

does converter charge house battery as well as chassis battery when plugged to shore power?

[mini4mw]

I'd check the owner's manual to be sure. Seems like recent models do.
Grumpy recently posted this from an owner's manual:
#########
When the power cord is plugged into 120-volt shore power, or when the generator (if
so equipped) is operational, the inverter/charger functions as a battery charger and will
automatically charge the house batteries when required. A bi-directional charge relay
incorporated into the electrical system allows the inverter/charger to charge the chassis batteries once the house batteries are sufficiently charged.
The chassis alternator charging system supplies power to the house auxiliary batteries
when the engine is running and the chassis batteries are sufficiently charged

[Grumpy]

Originally Posted by mini4mw

I'd check the owner's manual to be sure. Seems like recent models do.
Grumpy recently posted this from an owner's manual:
#########
When the power cord is plugged into 120-volt shore power, or when the generator (if
so equipped) is operational, the inverter/charger functions as a battery charger and will
automatically charge the house batteries when required. A bi-directional charge relay
incorporated into the electrical system allows the inverter/charger to charge the chassis batteries once the house batteries are sufficiently charged.
The chassis alternator charging system supplies power to the house auxiliary batteries
when the engine is running and the chassis batteries are sufficiently charged

That was for a GREYHAWK may not apply to the REDHAWK since it is a lower priced coach so definitely check your owner's manual. Other way to check would be use a voltmeter and see what voltage you have at both batteries (house and coach) when plugged into shore power.

[anf76]

thanks. there are a lot of (if equipped) in the owners manual. i haven't time to check what i have and don't have because of cold weather.

[mini4mw]

you should be good.

p86 of 2021 greyhawk manual
House Batteries
Your motorhome is equipped with Group 27 deep cycle batteries.
Unless a battery has been fully discharged, house auxiliary batteries are normally charged
in one of two ways:
 The chassis alternator charging system supplies power to the house auxiliary batteries when the engine is running and the chassis batteries are sufficiently charged.
 When the power cord is plugged into 120-volt shore power, or when the generator(if equipped) is operational, the inverter/charger functions as a battery charger and will automatically charge the house batteries when required.

p89
When the generator is operating, it powers the inverter/charger which in turn functions as a multi-stage battery charger to charge the house auxiliary and chassis batteries.

So something to test perhaps with multi-meter to be sure, but it would appear as long as the inverter/charger is on, which will work from generator or shore power ( unit plugged in), it should keep chassis battery up.

[pconroy]

Originally Posted by anf76

does converter charge house battery as well as chassis battery when plugged to shore power?

Not on my 2016 31FK.


Like others have said - use a voltmeter to check. Jayco always reserves the right to make changes. The manual might be accurate, might not.

[mini4mw]

I need to test mine as well. On another thread talking about the same thing:
https://www.jaycoowners.com/forums/f...tml#post937396

and even though the manual says it does, people have checked with multi-meter and verified it does not charge chassis battery when gen or shore power is applied.

[ljh684]

2019 Greyhawk 30X does not charge the chassis battery when only shore power (30 amp) plugged in. Shore power will charge the coach battery. I carry a 10 amp car battery charger and a 50ft extension cord. Pop the Ford E450 hood and clip on the charger to the chassis battery when camping with shore power. Usually tops off the chassis battery in 3 to 7 hours.

A more elegant solution is to install a "Trik-L-Start" aftermarket trickle charger unit so the chassis battery is charged when shore power is available.

[anf76]

on page 90, it says (if equipped) battery isolator solenoid, below that, it says (if equipped) battery isolation manager. how do you know if you have that?

[pconroy]

Originally Posted by anf76

on page 90, it says (if equipped) battery isolator solenoid, below that, it says (if equipped) battery isolation manager. how do you know if you have that?

On the Solenoid:


Take this with an uneducated grain of salt. As I'm not an RV expert at all. I think, to be factual, there are two isolator solenoids. The first one if the one I'm having trouble with - the one in the engine bay. This one charges the house battery from the alternator.


But, since this thread is talking about charging the house while plugged into shore power, I think we're talking about the other isolator solenoid.


Mine's tucked into the back of the battery compartment.


As for the "Manager" - I don't know what that is.

[Bullitt6283]

Originally Posted by pconroy

On the Solenoid:

Take this with an uneducated grain of salt. As I'm not an RV expert at all. I think, to be factual, there are two isolator solenoids. The first one if the one I'm having trouble with - the one in the engine bay. This one charges the house battery from the alternator.

But, since this thread is talking about charging the house while plugged into shore power, I think we're talking about the other isolator solenoid.

Mine's tucked into the back of the battery compartment.

As for the "Manager" - I don't know what that is.

The solenoid in the engine compartment connects the chassis battery and the house battery together when the engine is running or the dash pushbutton is pressed. The solenoid in your picture is the disconnect solenoid which disconnects (some) of your house circuits from the house battery. It is controlled by the switch at the house door.
The BIM or "Manager", if you have one, takes the place of the solenoid under the hood. It allows 2-way charging of the battery banks, whichever battery is being charged can charge the other one...
As to whether the chassis battery is being charged when the house battery is being charged, or vice-versa, there is varying documentation. The best way to find out how YOUR unit works is to use a voltmeter and see what's happening..

[ljh684]

Originally Posted by anf76

on page 90, it says (if equipped) battery isolator solenoid, below that, it says (if equipped) battery isolation manager. how do you know if you have that?

If you bought a high-end Seneca Class C, you have a BIM. If you bought a Greyhawk or Redhawk Class C, you likely don't have a BIM, just a dumb solenoid. Pop the hood, have someone press the button by the steering wheel which should activate the solenoid so you can find it via the loud clicking sound, then find the solenoid and take a picture of the part number with your phone. Google the part number. If you come up with a dumb solenoid for the part number rather than a "smart battery isolation manager", then you don't have a BIM.

[Groveite]

Originally Posted by anf76

does converter charge house battery as well as chassis battery when plugged to shore power?

My 2020 Greyhawk 29 MV does not charge the chassis battery. Found this out the hard way but luckily the emergency start button came to the rescue.

[sullivanclan]

I have my solar charge both my house and chassis battery. For what's it worth.

[Camper_bob]

Originally Posted by sullivanclan

I have my solar charge both my house and chassis battery. For what's it worth.

Did you do anything additional to make that happen?

I installed a Trick-l-start a while back (so my converter would charge the chassis battery when on shore power), and now that I'm looking at a solar install, I'm wondering if that will allow the solar to charge both batteries?