Bigger inverter/charger

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   Hey 455/458 guys and girls, have any of you replaced the 1600w MasterVolt Mass/Combi with a bigger inverter, like a Victron MultiPlus 3000w? I’ve been thinking of doing that when the time comes for a lithium upgrade. I’m just not sure if it will fit in the same space behind the settee cushion. The regular MultiPlus is too thick and the MultiPlusII is pretty tall - maybe too tall? Just wondering if anyone has made it work.I have a US spec boat with 50 amp split phase shore power, 240 v Mass/Combi and a Victron 240-120 transformer. I was thinking that with the Victron MultiPlusII 2x120 I could replace two boxes with one and ditch the extra transformer. I’m just not sure if I can squeeze it in there and can’t think of another spot for it. Here’s a picture of my factory setup:

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32mike Members Profile Send Private Message Find Members Posts Add to Buddy List Commadore Joined: 26 March 2020 Location: FLorida, US Status: Offline Points: 453	Post Options Post Reply Quote 32mike Report Post Thanks(0) Quote Reply Topic: Bigger inverter/charger Posted: 01 July 2025 at 14:48
	Hey 455/458 guys and girls, have any of you replaced the 1600w MasterVolt Mass/Combi with a bigger inverter, like a Victron MultiPlus 3000w? I’ve been thinking of doing that when the time comes for a lithium upgrade. I’m just not sure if it will fit in the same space behind the settee cushion. The regular MultiPlus is too thick and the MultiPlusII is pretty tall - maybe too tall? Just wondering if anyone has made it work. I have a US spec boat with 50 amp split phase shore power, 240 v Mass/Combi and a Victron 240-120 transformer. I was thinking that with the Victron MultiPlusII 2x120 I could replace two boxes with one and ditch the extra transformer. I’m just not sure if I can squeeze it in there and can’t think of another spot for it. Here’s a picture of my factory setup:
	Mike S/V Dulces Sueños 458 #087 Tampa, FL

marsella Members Profile Send Private Message Find Members Posts Add to Buddy List Rear Admiral Joined: 21 June 2022 Location: Antigua Jolly H Status: Offline Points: 592	Post Options Post Reply Quote marsella Report Post Thanks(0) Quote Reply Posted: 01 July 2025 at 18:54
	Mike, I dont think Victron is going to fit. I installed two Mastervolt inverters , 12to 120, 2500W ( right on pic) and 12to240, 3000W ( left on pic) , they both fit. Have Mastervolt charger (no inverter) which takes any voltage to charge 12V batteries installed by Hanse ( I moved it very far left). That was my built to US specs. Also I replaced Hanse bats by Victron Li (6 pack of 200Ah, they all fit as you see)

kipwrite Members Profile Send Private Message Find Members Posts Add to Buddy List Commadore Joined: 14 October 2015 Location: New York Status: Offline Points: 495	Post Options Post Reply Quote kipwrite Report Post Thanks(0) Quote Reply Posted: 01 July 2025 at 21:28
	I replaced my original US-spec'd inverter charger with a mastervolt 2500 - same overall dimensions as the factory supplied unit which had failed. Needed to remove about three inches from the bottom of the opening to the unit (wood back to the setee) to remove the old one and install the new one. No way to get the old one out without some wood surgery.
	Kipwrite

32mike Members Profile Send Private Message Find Members Posts Add to Buddy List Commadore Joined: 26 March 2020 Location: FLorida, US Status: Offline Points: 453	Post Options Post Reply Quote 32mike Report Post Thanks(0) Quote Reply Posted: 01 July 2025 at 21:33
	Thanks. Now I see that it looks like Marsella did the same!
	Mike S/V Dulces Sueños 458 #087 Tampa, FL

marsella Members Profile Send Private Message Find Members Posts Add to Buddy List Rear Admiral Joined: 21 June 2022 Location: Antigua Jolly H Status: Offline Points: 592	Post Options Post Reply Quote marsella Report Post Thanks(0) Quote Reply Posted: 02 July 2025 at 00:22
	Yes some cutting is needed, also I moved subwoofer to the wall under nav table so that the whole space can be filled with mppts and other stuff Edited by marsella - 02 July 2025 at 00:23



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