Re: Victron Quattro charger/inverter installation
Scott SV Tengah
We've lived 18 months in mostly tropical conditions with the Quattro 5kw. I have some thoughts on this.
1) You can mount the Quattro 5kw in the engine room, VERTICALLY as Victron intended. We had to mount the secondary Skylla-i 80amp charger horizontally, but that's fine as it will never run for more than 2 hours at a time, even if my 450ah lithium bank is completely empty (which it has never been). Both are placed right where Amel put my original Dolphin 100a and 30a chargers, making installation easy.
See installation photo on my earlier post at https://amelyachtowners.groups.io/g/main/message/47890
I have obsessively monitored charging and inverter output via the VE-Config software and the BMV-712 battery monitor because of heat concerns and possible power tapering. In my 18 months of mostly tropical live board living, that has never happened. Inverter output has never been tapered, even when motoring and running a big inverter load. Charger output has also never been tapered on either the Quattro or the Skylla, even when both are running off genset.
Lior - that said, you will need to break out the seal between the passageway and the engine room to install new cables. Don't skimp on this. This is not difficult and resealing it is not difficult either.
FYI installing the Quattro 3kw will still require that you use 2 PAIRS of 50mm2 cables, per Victron.
2) We opted for 5kw because the admiral and crew don't always monitor their concurrent usage. If they're running the boiler (2kw), the washing machine is in heat mode (1.5kw) and someone turns on the microwave (1kw), we are quite happy to have the Quattro 5kw. This isn't often, but it has happened before. Also the surge capacity of the Quattro 5kw allows us to use the scuba compressor on inverter/battery.
3) We looked at the Mastervolt Ultra. It draws 4w when the inverter is off. It draws 7w when the "low power mode" is selected. The MV low power mode is the same functionality as the "search mode" on the Victron, with the same no-load draw. What it does is pulse the inverter on every few seconds to search for a load. I opted not to do this because it causes my analog voltage meter (in the cabinet above the galley sink) to jump back and forth. Perhaps this is fine, but I didn't want the additional mechanical wear and the clicking sound is a bit annoying. And it won't turn sense low draw loads like small AC chargers or possibly laptops.
Instead, I installed a simple $5 switch on the electrical panel which allowed me to turn on/off the inverter remotely. We turn it on when we need the big inverter and turn it off most of the time. When "off", the power consumption is zero, which is less than the Mastervolt. That saves me 40AH a day, which is the equivalent of the daily output of a 200w solar panel!
We have the Amel installed 800w Mastervolt inverter at the nav station. We use that when we're running laptops, ice maker, bread maker, projector, cordless drill AC chargers, etc. Because of its low capacity, it's far more efficient at low power draws. We also changed some jumpers to activate "Economic Mode" so it draws even less when power draw is <250w.
Hope this helps.
2007 A54 #69