The more I look into EG4 and Sol-Ark I’m more impressed. Very powerful inverters in one unit. You don’t need an extra 4 to 10 MPPT controllers and Cerbo connected/wired on your wall.
I don’t know about the market in Europe but, in North America for solar systems people want as few boxes/inverters/batteries as possible and a simple setup. In the U.S., most people have their inverters/batters in their garages and won’t accept 10+ different boxes on their wall.
You are right, Victron is missing powerful hybrid inverters. The only hybrid inverter is the Multi RS 450 with 6kW. You can group 3 of them for a 3 phase system.
With the MP2 15k and announced 20k you can group 12 units building 180 kW / 240kW battery system, still many RS450 or other brand AC-PV inverters. With a new offgrid feature you can even have cooperating groups of MP2 15k and 20k working as an offgrid campus, like for hospitals in Africa.
Many people are looking for the HS19 a three phase 19kW hybrid inverter announced since two years.
The market for Victron is
If your main preference is simple installation (less boxes and cables) other brands will suit you better.
If you need to integrate certain components or have nearly no limits, Victron might be your choice.
With EG4 you cannot design 120kWh battery. Their top of line FlexxBOSS21 has up to 85kWh.
My BMS supports up to 16 batteries in a stack. Using EVE MB56 cells (628Ah) this would sum up around 650 kWh. There are other Victron compatible BMSs supporting even more batteries in a stack.
Maybe getting a ready assembled Victron system
In a container does suite more your needs…. Have a look at 
180kVA beast from Dracula land 🧛
Seriously , everbody needs to find his perfect match.
What is the most powerful Victron inverter configured for North America 120V for 48v battery banks ?
Seems to be
MultiPlus2 5K 120V
Quattro 10k 120V
You need to double check the manual for paralleling. With 230V models, you can put 4 equal units in parallel.
I been crunching some numbers with the Victron setup below and there are some issues…
Hypothetical setup…
60 AIKO STELLAR 2N+78 (AIKO-A805-GRH78Dw) 805W (48.3kw)
2 Victron Quattro 10kVA 120V QUA483100102 inverters connected in parallel.
10 Victron SmartSolar MPPT 250/100-Tr VE.Can
Victron Cerbo GX MK2
6 Coremax 20 kWh 48v/400ah battery banks. 120kWh usable storage.
Running the numbers through ChatGP, it says that the MPPT controllers are not the problem and they can handle the solar array 48.3kw and there is no clipping with the MPPT controllers. But, massive clipping occurs with the inverters and there is a huge bottleneck with inverters and battery charging…
Your 20 kVA inverter bank can handle up to ~20 kW AC.
Your 48.3 kW DC array can produce far more than this under ideal conditions.
Even with Alaska’s lower annual insolation, short winter days with high solar reflectance from snow can lead to peak DC output exceeding 30–40 kW.
Result: Significant clipping at the inverter stage when DC > 20 kW.
For example, at 80° winter tilt and snow cover, panels may produce 70–80% of rated capacity during midday. That’s ~38–39 kW DC, far exceeding the 20 kW AC inverter limit.
Coremax 20 kWh batteries: Assume max charge rate of 0.3C = 6 kW per unit → 36 kW total.
But your inverter/charger limit (Quattro 10kVA each) caps charging at ~150A @ 48V = 7.2 kW per inverter → 14.4 kW total.
Bottleneck: Even if solar and MPPT can deliver more, battery charging is limited to ~14.4 kW.
To eliminate this, I would need 7 Victron Quattro 10kVA 120V inverters: Roughly around $20,000 dollars just in inverters only.
7 Victron Quattro 10kVA 120V inverters: $20,000
10 Victron SmartSolar MPPT 250/100-Tr VE.Can $6,130
2 Victron Orion-Tr Smart 48/12-30A (360W) Isolated DC-DC Converter $488
Victron Energy Cerbo GX MK2 $248
60 AIKO STELLAR 2N+78 (AIKO-A805-GRH78Dw) $5,000
6 Coremax 20 kWh 48v/400ah $15,000
Total: $46,866
What can I buy that is much cheaper than Victron’s setup above?
1 Sol-Ark 60K Hybrid Inverter | 60kW 3-Phase | Native 277/480V ( SKU 60K-3P-480V ) $15,750 to $17,000
or…
1 Sol-Ark 30K Hybrid 3-Phase Solar Inverter | 30kW 120/208V | AC/DC Coupling | Stackable to 300kW $11,900
Did I miss something, or do you mix up some parameters…
Because, - you could charge the battery with MPPTs with the expected ~36kW. That is fine with the array of up to 10 MPPTs, as you already said.
The Quattro Inverter(s) are only needed for discharging the battery, and I still have the ~3,5kW of max power you need at once.
The only point where the inverter(s) might be relevant for charging is with the generator. But is you generator capable to charge continously with >10kW and is this relevant for you?
Exactly, Jetlag is perfectly right.
The full power of the PV is used to charge the battery bank, because the MPPTs are directly connected with the batteries, on DC side.
And as long as your generator is less than 10kVA, power that reaches the batteries through the 10kVA inverter, your configuration is OK.
Good points…
The data I was looking at was ChatGP.
ChatGP’s numbers say that the 2 Victron Quattro 10kVA 120V inverters will create a bottleneck with a solar array of 48.3kw and those 2 inverters will severely limit the capability of that solar array, that one of the possibilities to get the true potential of 48.3kw solar output is to add more inverters…
| Source | Capacity | System Demand | Clipping Risk |
|---|---|---|---|
| Solar Array | 48.3 kW DC | — | — |
| MPPT Controllers | 48 kW | <48 kW |  No clipping |
| Inverters | 20 kVA AC (~20 kW) | 48.3 kW DC possible |  High clipping risk |
| Battery Charge Rate | ~14.4 kW (inverter-limited) | Up to 48.3 kW | Severe bottleneck |
Conclusion: You will experience substantial clipping, primarily due to inverter and battery charge rate limitations, not MPPT.
I could be completely wrong and over exaggerating the effects of clipping. If I’m going to have 48.3kw of solar output I would hope the inverters can exploit it or it seems those panels is a waste of money. I could downsize the number of solar panels, around 30 to 40 panels in total or go with a more powerful inverter. But, it’s Alaska, I think that for the winter months and trying to go as many days as possible without using the backup generator is a top priority.
Start small, with fewer panels and proportional MPPTs and then add on the go, based on observations and demand.
The full power of PV will reach batteries as it doesn’t pass through inverter, as they are directly DC connected with the batteries.
Size the inverters based on the power you need - for discharging - and the power you have on the generator - when charging.
Pick the biggest from those two and buy an inverter about 30% bigger, for safety margin.
Example: when discharging, max peak load 4kW. When charging with generator, the genset is 6kW.
So biggest is 6kW. 30% bigger than 6kW is 7.8kW. Pick two (split phase system) MP2 48/8000.
I think ChatGPT is expecting an ESS, that mean that the full solar power shall also be feed into a grid when the batteries are full. In such a case the inverter(s) would be indeed way too small.
But this is not your use case. I would also recommend you to start “small” or at least with less then initially planned and check how far you get. That’s also why Victron is so much modular, you can extend the system on demand if needed.
And – probably the most important aspect for me – Victron systems are open. Nothing is proprietary. You’re not limited to Victron’s own components, but can choose from a large number of components available on the market and integrate them using standard methods. If a part fails, you can easily replace it with parts from other manufacturers, even if the original manufacturer no longer exists. This gives the user freedom and at the same time great security!
And that’s precisely where the dividing line between open and proprietary systems lies. Under no circumstances do I want to be permanently tied to a manufacturer and their proprietary system. And this isn’t so much for economic reasons (due to small production runs, components in proprietary systems are always more expensive) as for fundamental freedom-related ones.
I personally would like Victron to create a lineup of inverters that are similar to Sol-Ark and EG4 that combine the MPPT controllers all in one. I’m not saying Victron should eliminate their current lineup but, to add to it, add some different inverters to expand their customer base.
Victron also needs to add more inverters that are 120/240v for North America. The U.S. is the 3rd largest country on earth, a large market. Americans will continue to turn to Enphase, Renogy, Eco-Worthy, Sol-Ark, EG4 if Victron doesn’t make their system more user friendly.
Like I posted above, the vast majority of Americans who have solar systems of 20 to 50 panels are grid-tied suburban houses. The batteries/inverters are in their garages on the wall. Most do not want 10+ different boxes covering their entire garage wall, that is not what most homeowners want. Americans like many people use their garages not just to park their cars but, their walls have shelves and tools to hang. One inverter box and some batteries and that’s it. We want more people to rely on solar and to make it easier and less complicated.
You can install ten MPPT 250/100 to charge your batteries with your 48kW of PV and at the same time use only an MP2 48/5000 for the AC stuff. Charging and discharging are two different, and seperate, things. The inverter has nothing to do with the MPPT. You dont even need an inverter, the MPPTs are fine charging the batteries with you using the 48V DC directly (given that you have compatible devices).
Only if you choose the newer MultiRS then theres some loose connection between the two, but that model is 230/240V only.
The modularity of the Victron ecosystem is a key point i think. You can start your build with am MP2 48/5000, a Cerbo, a lynx distributor, an MPPT, a few PV panels and 10-15kWh of batteries. If down the line you see that its not enough, you add. So if your PV is not enough for winter, you simply add another MPPT. If you need more fuses, you add another lynx. Thats not the case with regular hybrid inverters, you need to decide upfront on the system size. But as we can see here thats not always easy.
A bit off-topic, but i think its funny that my definition of a cabin is different than OPs. 48kW of PV and 160kWh of batteries would be nice to have in my house
These are two separate issues:
User-friendliness: This is somewhat at odds with the desire for a system that is as open as possible and offers the greatest possible configurability. Anyone wanting to build a standard Victron-based ESS can manage with minimal configuration effort. However, in a proprietary system, these configuration parameters are fixed and permanently installed by the manufacturer.
The US market: You’re familiar with the new US administration and know that it intends to close off the US market with extremely high tariffs, and that it is not only hostile to the EU’s common market, but to the EU project as a whole? As a European manufacturer, I would currently be very cautious regarding any specific investments aimed at accessing the US market.
I agree with some points…
Space and wiring: 2 AC inverter boxes, 2 DC - DC inverter boxes, 10 MPPT controller boxes, Cerbo box, (15 Victron boxes, 6 battery racks) that’s a lot of boxes to wire and put some where. One powerful Sol-Ark or EG4 inverter with built-in MPPT’s is very convenient.
You are building an off-grid system not for a year, so just calculate the total cost (ESS base price + usage costs) for 10–15 years of use (inverter self-consumption + petrol for the generator + service + etc.).
After that, choose what is more suitable for you.
Also think about the afficients DC and AC PV.
As I understand, your main goal is to store energy in the battery and use it during long cloudy/snowy/fully dark days.
Sol-Ark or EG4 are more useful to charge an EV when you have huge AC consumption or sell to the grid.
For the AC consumption that you specified in the first post, two inverters MPII 48/[3000|5000] 120V fully cover your needs
Yes, thank you.
I was ignorant about clipping and believing it was going to cause more problems than it really would.
