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Multiplus II with PD EMS wiring help


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For those that have upgraded to the Victron MP2. I am thinking about swapping out my Xantrex 2000 for a Victron Multiplus II 3000 and installing Lithium batteries. The part that I need help with is the wiring from the PD 4000 distribution panel and bypassing or disconnecting the charger.  Still need converter portion for shore 110v?

MP2 for Inverter DC to AC, power switch (Shore to DC, DC to Shore) and charging. 

Does the OEM wiring from the junction box on Xantrex end just go into the AC IN and AC OUT on the Victron Multiplus? Or do you need to run the shore power out of EMS to Multiplus AC IN and then back to distribution panel. 

Do you simply disconnect charger?

If you run new longer feed from the EMS to MP 2 AC IN then can you use the AC OUT back to the PD 4000? OR does the EMS to MP2 go back to shore power in the same AC in on back of PD 4000. 

Any clarification on these questions or pics would be greatly appreciated. Just trying to figure it all out before hiring someone or diving in myself. I, also, just want to understand how it works. 

Thanks in advance for any feedback. 

Mike

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- Mike


Nashville, TN


2018 Elite II - Spirit of Adventure Hull #308  - Toyota Tundra 


 

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I upgraded our 2019 from the older 2000watt xantrex inverter to a new combo 2000w xantrex inverter/charger and added Lithionics batteries. 
 

I disconnected the on board progressive dynamics charger (below the dinette). 

I suggest you do a diagram of your current wiring before doing any work. 
 

I created an article on our upgrade:

 

https://4-ever-hitched.com/ggs-blog/f/lithium-battery-upgrade?blogcategory=Electrical+Upgrades

I left out the ems connections in the diagram. 

if you have questions after looking at that pm me and we can talk directly on the phone.

 

Craig Short

 

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2019 Elite II (Hull 505 - Galway Girl - August 7, 2019 Delivery) 
Tow Vehicle: 2021 F350 King Ranch, FX4, MaxTow Package, 10 Speed, 3.55 Rear Axle
Batteries Upgrade: Dual 315GTX Lithionics Lithiums - 630AH Total
Inverter/Charger: Xantrex 2000Pro 

Travel BLOG:  https://4-ever-hitched.com

 

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Love this diagram and explanations. Thanks for write up. The forum is so helpful. I think I have it all figured out it just seems too simple:

Remove Xantrex, transfer switch and jxn box. Install new mount and MP2

Wire up batteries, Take AC IN and AC OUT from the JXN box and plug into AC IN/OUT on Multiplus II. 

Disconnect PD 4000 charger/converter. 

I plan on installing shunt and DC to DC charger soon, so both of those included in write-up helps. 

Thanks again, M

 

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- Mike


Nashville, TN


2018 Elite II - Spirit of Adventure Hull #308  - Toyota Tundra 


 

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I believe in your specific trailer has two external ports for shore power.
Those connections first go to the transfer switch that is on your front wheel well.
That shore or generator power (when applied to either port) goes through that transfer switch then the output connects to the input side of the EMS.
The output of the EMS connects to the main Breaker Panel.

On that panel you'll see the following breakers as indicated on the inside door panel.

The #4 (20A double wide ) breaker is the one that feeds your outlets and microwave. It's also the one connected to the GFCI outlet under the front dinette seat.  It's this circuit that your inverter feeds when you turn it on. 

As to the PF4000 charger output. In the photo you'll see I've taped off the 15A breaker #5. That's the breaker that fed power the charger in the PD4000 panel. 

I've also disconnected the PD4000 charger outputs from the battery circuit and capped and taped the charger output wires. (That way even if the breaker is flipped on, no power will be applied to the new batteries from that old charger.)


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Edited by Galway Girl
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2019 Elite II (Hull 505 - Galway Girl - August 7, 2019 Delivery) 
Tow Vehicle: 2021 F350 King Ranch, FX4, MaxTow Package, 10 Speed, 3.55 Rear Axle
Batteries Upgrade: Dual 315GTX Lithionics Lithiums - 630AH Total
Inverter/Charger: Xantrex 2000Pro 

Travel BLOG:  https://4-ever-hitched.com

 

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Posted (edited)

Craig, so helpful. Thank you for explanation and pics. I am following you with everything but back feeding power thru the dinette GFCI to the A/C. I have a line 2 AC OUT on inverter if that helps. 
 

Edited by rideadeuce
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- Mike


Nashville, TN


2018 Elite II - Spirit of Adventure Hull #308  - Toyota Tundra 


 

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Anyone with a Multiplus II 3000W upgrade able to share how they powered A/C from the inverter. MPII has transfer switch built-in. So the plan is to remove the OEM transfer switch and Jxn box. Then connect  the AC IN and AC OUT to the MPII from the old junction box wiring to power outlets and microwave. 

The puzzle for me is wiring/powering Air conditioner off the inverter. On this schematic, the air conditioner looks like it is powered from the converter only.

My OTT is a 2018 with a 2000W ProWatt inverter OEM.

Planning stages of upgrading to MPII 3000W with larger lithium battery bank so that I can run the Air conditioner when off shore power. 

 

 

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- Mike


Nashville, TN


2018 Elite II - Spirit of Adventure Hull #308  - Toyota Tundra 


 

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The shore power ( or generator) feeds thru the ems to the breaker panel.  The a/c ciircuit is on its own  20 amp circuit .

 

if you want to power the a/c from the new inverter,  you would need to also wire into that 20 amp breaker from your inverter.  
 

what does the multiples 2 have as ac output?  Is it one output or two? 

2019 Elite II (Hull 505 - Galway Girl - August 7, 2019 Delivery) 
Tow Vehicle: 2021 F350 King Ranch, FX4, MaxTow Package, 10 Speed, 3.55 Rear Axle
Batteries Upgrade: Dual 315GTX Lithionics Lithiums - 630AH Total
Inverter/Charger: Xantrex 2000Pro 

Travel BLOG:  https://4-ever-hitched.com

 

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Ok, Perfect. The MP2 has (2) AC line outs. So just a separate AC out line 2 from inverter to A/C 20 amp circuit.

- Mike


Nashville, TN


2018 Elite II - Spirit of Adventure Hull #308  - Toyota Tundra 


 

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It says on the mp2 datasheet:

 

”Two AC Outputs
The main output has no break functionality. The MultiPlus takes over the supply to the connected 120V loads in the event of a grid failure or when shore/generator power is disconnected. The transfer time of the L1 output is less than 18 milliseconds so that computers and other electronic equipment will continue to operate without disruption.
The transfer time of the L2 output is longer: approximately 40 milliseconds.
The second (auxiliary) output is live only when AC is available on the input of the MultiPlus. Loads that should not discharge the battery can be connected to this output.”

You might try asking service how they connect up their 3000 watt inverter to run both a/c and outlets. 

 

Edited by Galway Girl

2019 Elite II (Hull 505 - Galway Girl - August 7, 2019 Delivery) 
Tow Vehicle: 2021 F350 King Ranch, FX4, MaxTow Package, 10 Speed, 3.55 Rear Axle
Batteries Upgrade: Dual 315GTX Lithionics Lithiums - 630AH Total
Inverter/Charger: Xantrex 2000Pro 

Travel BLOG:  https://4-ever-hitched.com

 

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Thank you. I think we were reading the some of the same information. 

"AC-Out-2 supports loads that you only want to run when on shore power or generator. "

34 minutes ago, Galway Girl said:

You might try asking service how they connect up their 3000 watt inverter to run both a/c and outlets. 

 

Yes, unfortunately they don't show their electrical schematics on new systems with 3000 W inverters it seems.

- Mike


Nashville, TN


2018 Elite II - Spirit of Adventure Hull #308  - Toyota Tundra 


 

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@Galway Girl What are your thoughts about this. Connect the original jxn box AC IN and AC OUT together to complete circuit for outlets and microwave. Removes the transfer switch and inverter from circuit. 

Then take main shore power from EMS that goes to PD 4000 and run it to AC IN on MP2

Then run AC LINE 1 OUT from MP to PD4000 main input.

ALL the power from shore/Gen runs through EMS then to MP2 and then back to PD4000 main, thus distributing to all circuits including air conditioner. 

- Mike


Nashville, TN


2018 Elite II - Spirit of Adventure Hull #308  - Toyota Tundra 


 

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It says on the mp2 datasheet:

 

”Two AC Outputs
The main output has no break functionality. The MultiPlus takes over the supply to the connected 120V loads in the event of a grid failure or when shore/generator power is disconnected. The transfer time of the L1 output is less than 18 milliseconds so that computers and other electronic equipment will continue to operate without disruption.
The transfer time of the L2 output is longer: approximately 40 milliseconds.
The second (auxiliary) output is live only when AC is available on the input of the MultiPlus. Loads that should not discharge the battery can be connected to this output.”

 

 

2019 Elite II (Hull 505 - Galway Girl - August 7, 2019 Delivery) 
Tow Vehicle: 2021 F350 King Ranch, FX4, MaxTow Package, 10 Speed, 3.55 Rear Axle
Batteries Upgrade: Dual 315GTX Lithionics Lithiums - 630AH Total
Inverter/Charger: Xantrex 2000Pro 

Travel BLOG:  https://4-ever-hitched.com

 

IMG_5421.jpeg.c1f697a00240a9bd6729b0930bd3a4aa.jpeg

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