Right, but already 3 of them have more charging power than a MPII-5000.
Of course it all depends on what you need, and what you want, and what would fulfill your needs and wishes most economically.
I will have a 40/5000 for sale in a few weeks once it comes back from Victron if thatâs of interest to you? I went down a similar route but donât have the space for a second mp2 so upgrading to a 10va unit
I have a similar setup to you, 4 x US5000 & 1 MP2 48, 5000. but I have an EV charger and am on the iOG tariff which is great at the moment as I get plenty of hours to top up the batteries during off peak times although this will change with the new changes coming in the new year.
I do have a second MP2 that I am going to install and have a few spare US3000 to add to my capacity which should see me through the day of peak rates. I do have some solar panels on the garage roof (flatâish) but this time of year do pretty much nothing.
I have a Victron MPPT for those solar panels and I have another MPPT which is fed by a 48v lithium battery charger which gives me 20amps extra of charge and is fully controlled by the pylontech BMS through the victron bus so no need to worry about anything.
I know you mentioned your first step would be the ev charger so you can get on iOG but that will only give you 1 hour extra and save you 6p per day which wont help massively. What would help is a second MP2 as you would double your charge rate (and inverting capacity) which would be a far better payoff imo. Also the second MP2 also gives a little redundancy should 1 MP2 experience a failure. A problem with single MP2 of a larger capacity would take you completely offline while you get it repaired. Also I believe the MP2 10000 isnât (or wasnât) g99? so needs different approvals (could of changed since I looked into it).
EDIT: also look at integrating home assistant and/or setting up the VRM portal for stats, history etc.. (cerbo GX or raspberry pi).
UPDATE
HYPERVOLT Home Pro 3 charger purchased and delivered
Very sadly it wont get installed till next year as my Electrician is ULTRA Busy.
Charging has been maxing out at 88% 90% and I have set the lowest SOC as 5% BUT somehow the inverter does not like this, and starts charging at a low rate at 7% SOC kicking in at 23:00 hours so I have 90 minutes of low amp charging {maintaining} before at 00:30 the inverter starts its full charge rate process.
I got gifted four 24V 70mm fans and they are ultra slim so I am going to install two of them inside the detachable bottom of the inverter (pics soon)
IF as seems the case I am running out of battery power at around 23:00 hours then the IOG tariff should work well as the extra hour should fully charge my 20kWh batteries (looking to add another 10kWh ASAP) and as the charging will start an hour earlier hopefully the batteries will still be above the minimum 5% SOC. AND once the system is at 30kWh then I can set the minimum SOC back to 20%. This will give me 24kWh of battery energy which should be enough to run the house in the winter with limited solar energy. AND I will have some headroom to play with as well, as the house needs or has used historically 22 to 25kWh
Hopefully soon {before Mid Jan} I can relax and move onto other things with my BSS working well.
I really donât know where you get that info from I estimate that moving to IOG and looking at the cost of charging my battery just now, it will save me around 40ppd, ÂŁ146 per year. NOT that this is the only reason that I want to go to IOG, but that figure gives a ROI of just over five years for the Hypervolt EV Charger, that is a no-brainer.
My bad, my calculation only took into account an extra single kwh of charge needed.
My assumption on iOG not being a priority was primarily due to payback but I took a fairly expensive estimate on ev charger installation of ÂŁ600-700+ (inc. cost of charger) By my calculations if you have a SOC minimum of 10% it should take about 5 hours to get to around 90-93% before you hit absorption. Then it would be about an hour or so to then hit 97-98% soc which is likely around 1.5kw of charge. Although I presume your using around 18kw to charge the batteries which I calculate a difference of 27p per day moving to iOG (assuming you do all the charging during off peak rate), ÂŁ98 per year.
attached is snapshot of my system the other day hitting 11% soc (my automation missed the additional charge octopus gave me) then getting up to 92% in around 5 hours. (4 x US5000, 1 MP2 5k). Which I assume should be similar to what your getting?
Over Christmas Iâll be installing an extra US5000C and additional MP2 and likely some US3000 too as I have them doing nothing as the new iOG rules coming in the new year will severely restrict the hours we can charge batteries.
I looked at my overnight charging costs and extrapolated that with a 17.5% reduction times 365 I also bought a nice cheap {NEW} Hypervolt Home Pro 3 EV charger.
I am not yet sure of installation costs BUT the electrician who will do that has been working with me for a number of months now, starting with the new steel double consumer unit and various other wiring jobs in the house including the {misunderstanding of my quite clear instructions (I am a {long rtd} Computer and Network Electronics Engineer) when he failed to totally isolate the Grid Feed to the MP2 (that caused lots of head scratching and posts here).
BUT he is a good electrician.
Sadly like too many tradesmen (they know best) and do not follow the instructions of the client. I am NOT a certified Electrician so I needed one to do the A/C side of the house rewiring.
WELL I am ATM hitting 88% SOC before the five hours of low cost electricity times out.
I am considering adding another charging schedule starting at 05:30 initially for 30 minutes to see if that will result in a 100% SOC.
If the first option does not work I may even schedule a 23:30 start to simulate the IGO cheap rate charging schedule, to see if that will result in a 100% SOC
Obviously once I have IOG then the batteries will get a six hour charge window AND will also be in a higher state of charge at 23:00
NOW COOLING
I added two fans internally 70mm ones, see pictures
Did this make any difference to the charging? NOT A BIT 
So it looks like Victron knew what they were doing when they designed and built the MultiPlus II 48 5000 70 inverter 
I will leave the fans installed while I play with increasing the charging times.
I think you will find the fans have some use (albeit probably small) when it comes to inverting on high loads, I also recall a certain batch had poor cooling/fan issues and there was also a firmware update to fix fan issues.
One thing you could do (at your own risk blah blah blah) to speed up your iOG transfer is wire up the EV charger to a 3 pin plug on 13 amps (appropriate sized cable) and limit the current on the charger to say 10amps (for example) setup wifi etc.. and then begin the process of switching tariff. You will have a working charger that you can setup for iOG and do the initial test charge so that you can be activated. You should only need to do this once and then you can wait for your electrician to do the full install afterwards.
Canât recall if you have setup any smart automations with the likes of home assistant which you can then use to automatically charge your batteries when you are on the cheaper rate.
wow thanks for all of that and especially the above bit I do have ALEXA
OK SNEAKY I like that 
Questions
Q1. Do I just do a âquick connectâ power to the charger and WiFi to my router, no need for the CT Connection?
Q2. DO I NEED to do ONE Charge to âactivateâ the Charger and get the iGO tariff?
Q3. I thought I activated the charger with an App?
Q4. This is just to âactivateâ the iGO tariff and once I have that, I charge the car like just now with my granny charger?
Q5. Does the Hypervolt Home Pro 3 need to remain powered up until the full install by my electrician? OR once I have the iGO tariff it can remain unpowered and unplugged for a few weeks until my electrician is free to install it?
Q6. My old garage is within spitting distance from one of my newly installed two, twin 13A waterproof outdoor sockets. They are on a 16A MCB, so I could sit the box in the the garage as a temporary location. Distance is not a Problem as my Leaf is an early version with a Type One charging socket and the Nissan supplied Type One to Type two cable is a fair length. BUT donât I need the CT operational (I could probably do a quick dirty temporary fix to connect the CT with a piece of CAT 5 cable)
BUT Then if I set the dip switches to the 10A setting {Even though this circuit is on a 16A MCB I cannot really set the charger to 16A as the connection would be via a 13A socket} the Hypervolt EV charger will not charge any faster than the granny charger???
Questions
Q1. Do I just do a âquick connectâ power to the charger and WiFi to my router, no need for the CT Connection?
When I was getting setup (zappi but should be the same process), I just connected the CT around the live feed to the charger (inside the charger) so it only really seeâs itself and thinks theres no other loads. Shouldnât be an issue as you are going to limit charge current anyway.
Q2. DO I NEED to do ONE Charge to âactivateâ the Charger and get the iGO tariff?
From my experience when you apply to swap tariff, they will want you to connect the charger to their API (they provide instructions) and then once thatâs connected they will want to do a test charge to activate the tariff.
Q3. I thought I activated the charger with an App?
you will setup the charger with the hypervolt app I presume and then will need to link it to octopus.
Q4. This is just to âactivateâ the iGO tariff and once I have that, I charge the car like just now with my granny charger?
Correct, youâll need to still manually choose when to charge.
Q5. Does the Hypervolt Home Pro 3 need to remain powered up until the full install by my electrician? OR once I have the iGO tariff it can remain unpowered and unplugged for a few weeks until my electrician is free to install it?
From my experience, yes the hypervolt can then remain powered down and you will just be getting the tariff timed cheap rates and wont get any additional slots.
Q6. My old garage is within spitting distance from one of my newly installed two, twin 13A waterproof outdoor sockets. They are on a 16A MCB, so I could sit the box in the the garage as a temporary location. Distance is not a Problem as my Leaf is an early version with a Type One charging socket and the Nissan supplied Type One to Type two cable is a fair length. BUT donât I need the CT operational (I could probably do a quick dirty temporary fix to connect the CT with a piece of CAT 5 cable)
BUT Then if I set the dip switches to the 10A setting {Even though this circuit is on a 16A MCB I cannot really set the charger to 16A as the connection would be via a 13A socket} the Hypervolt EV charger will not charge any faster than the granny charger???
thatâs all correct, the only real benefit of using the hypervolt in this way would be to get some extra charging slots.
MORE FUN and GAMES
OK doing a dirty temporary install of my Hypervolt Home Pro 3 EV Charger
It was fairly simple to mount it on the back of the wooden door of my old garage (LOVE that KIT) Screw the bracket on and then the unit clips into the bracket and is retained by one screw at the top.
Took the round pin connectors off of a marine yacht charge 20A cable I had laying in a box in the cellar (One of three)
PROBLEM ONE
The Hypervolt Charger says the WiFi signal is rubbish but âjustâ strong enough to work BUT NOT recommended. Since this is a temp install just to be able to swap to iGO tariff that is NOT highly critical.
BUT I phone Virgin Broadband support (OH HELP VM support is now done in India). Total waste of time trying to explain what a HV HP3 EV charger is. But I donât give up and eventually they understand (IT IS a POOR WiFi SIGNAL)
First Fix is reboot (remove the power from) the Hub/Router
OOOPS that disconnects my phone from VM 
with the loss of the WiFi signal.
Wait for a call back once my Hub/router is back online and switch off WiFi on my phone.
NOPE no call back so call VM again.
They are going to fix the problem remotely (now that would indeed be magic) When that fails they organised a network support call/visit in 3/5 Days
Pre all this I had positioned the Hub/Router to {hopefully} improve the signal strength to the garage
Back to the HV HP3 Using the installation app I cannot âadopt it
A few calls later to some ârealâ technical support (Hypervolt Tech Support are Amazing) and some online tinkering with the charger it is working and I get it adopted.
Moving onto the User App once it had been handed over I can update all the same info that I had to input in the Installer App plus lots more information.
EVERYTHING IS WORKING EXCEPT IT WONT CHARGE MY CAR
Now I have an early EV-01 Leaf this has a Type One charge connector/socket. OUCH as the HV HP3 is a Type Two charger BUT the Leaf comes with a Type Two to Type One conversion cable in a bag in the boot 
More calls to Hypervolt support and they are asking for an email and pictures.
Thinking that the T2 to T1 cable might be the problem I check it for continuity and NOTICE one pin is much lower than the others. A quick Goggle check confirms that this is correct and is designed to connect and disconnect in a proper manner. BUT needing total proof that this cable was good, I realised that my neighbour has a ZAPPI EV Charger AND it is the untethered variety. So after a quick chat my Leaf is in his drive connected to his ZAPPI and charging fine. {cable is proven good}
So it would appear that the HV HP3 Charger is faulty UNLESS the connection from the Type Two cable into the T2 to T1 conversion cable is not making proper contact. I guess I need to ask my neighbour to bring his EV that has a Type Two charging socket over to my drive to see if the HV HP3 will âseeâ his car as for sure it is not seeing the Leaf so wont start charging.
What seemed like a simple quick and dirty installation process has for sure become just a little more complex. BUT hopefully once the HV HP3 charger is fully working this will make the final installation run smoother.
ITS WORKING I am on the Octopus iGO tariff
As I discovered you CANNOT extend a Type 2 charge lead so that was why the HV HP3 EV Charger could not see my Nissan Leaf ZE0 First Generation model with a Type 1 charging socket
I have proved that the HV HP3 EV Charger is fully functional and working fine and using my neighbours EV with a Type 2 connection on plugging in to his car the HV HP3 EV Charger immediately started charging.
Setting up my Octopus iGO tariff the charging immediately stopped as Octopus took control of the HV HP3 EV Charger and it is now in Octopus mode.
I have ordered an âin carâ Type 1 to Type 2 converter and once that arrives I am sure that everything will be working well.
As they say âevery day is a school dayâ
PHEW!!!
Excellent news on the charger and tariff swap, should hopefully give you a little bit of time to get things setup ahead of the full install and look at some automation in order to detect when your in off peak so you can charge the batteries (and car).
YES I have asked Octopus âHow will I know when during the day you are doing cheap energyâ
I cannot as yet figure out how to âdetectâ when Octopus are supplying âduring the day unscheduled cheap energyâ NOR can I see how I could do some automation to use that energy for charging my batteries BUT maybe I can put a CT on the feed to the HV HP3 EV Charger and use that (because Octopus will have remote control of the HV HP3 Charger) to trigger the MP2 to start charging my batteries and of course stop when the cheap rate ends.
MP2 and Getting hot does not seem to be an issue for me and I do nothing it is my adding two fans that has made any difference
My charge rate seems good and constant and consistent and does not drop off during the six hour charging period
EXPLAIN this to me please what automation AND why did it miss a cheap energy period??
My automation routine missed the trigger I have setup to detect when Octopus are putting me on the cheaper tariff (I think I was doing an update at the time).
My automation is using Home Assistant & the custom integration by âbottlecapdaveâ for Octopus data & âsfstarâ integration for victron. With this it uses Octopusâ API and you can see so much information on your tariffs and charger etc.. But most importantly is the ability to see if your on the off peak rate at which point you can trigger the batteries to charge and then when not on the cheap rate, discharge the batteries.
Happy to give more info on my automation if its of any use, although I do need to tweak my routine so that it does periodic checks just in case I do miss the trigger that switches peak/off peak rates again (As currently thatâs the only trigger for me to charge/discharge the batteries).
Then in the near future I will be looking to build something into the automation to take advantage of free hours (when they cr3dit you back) and when they want you to reduce your usage during certain hours (in case this is during any offpeak times) and in addition I need to build in something to take into account solar generation as thereâs times of the year when I do export (not getting paid for it) so Iâd like to not charge my batteries up to 100% at these times.
YES PLEASE give me all that i need to know please
NOW just looking at my Hypervolt App it is showing TWO Upcoming Octopus Sessions for tomorrow SO I assume I can set up two MP2 sessions to charge my batteries then as well and charge my batteries during the day. Looks like I get six hours in two sessions so My Batteries will be singing and dancing
Will post again as to how all this works