Somebody, somewhere, typed "Fronius Symo 24.0 vs Solinteg 30 kW hybrid" into a search box. It's a fair thing to type if you're sizing a 30 kW system and two names keep appearing on quotes. The trouble is that the two boxes belong to different categories, and the comparison falls apart before you reach a single efficiency figure.
This piece is a document comparison. I read the Fronius Symo Advanced technical data page and its UL datasheet, the Fronius Verto Plus operating instructions, Solinteg's MHT 25-50 kW datasheet and the manufacturer pages for its newer M2HT line. I haven't installed any of these. Where the documents disagree or stay silent, I say so.
Why Doesn't the Symo 24.0 Pair With a Solinteg Hybrid?
Two reasons, and either one is enough.
Category. The Fronius Symo Advanced 24.0-3 480 is a grid-tied string inverter. Its technical data page lists two MPP trackers, 24 kW of AC output and a 200 to 1,000 V DC input range, and it says nothing about a battery connection. The Symo Advanced datasheet pitches the family at commercial applications and lists no storage port either. Solinteg's MHT-30K-100 is a three-phase hybrid with a battery input rated for 135 to 750 V and 100 A.
Grid. The Symo 24.0-3 480 outputs 3~ 480/277 V WYE at 60 Hz, according to the UL datasheet, a North American configuration. Solinteg's MHT datasheet lists rated AC voltages of 220/380, 230/400 and 240/415 V, at 50 or 60 Hz. There isn't a 480 V option on that sheet. So the two aren't alternatives for the same building.
What happens if you ignore all that and put them side by side anyway? You compare a 24 kW box that cannot hold a battery against a 30 kW box built around one. The result tells you nothing about either.
Which Fronius Is the Real Match?
The Verto Plus 30.0. Fronius's own operating instructions list it at 29.99 kW rated power, with a high-voltage battery input and Full Backup at rated output. That's the model that shares a job description with Solinteg's 30 kW hybrids, and the one I compare below. The older Fronius Eco 25.0-3-S in our product listings is another grid-tied string inverter, with Tauro and Verto named as its commercial successors, so it sits with the Symo and not here.
| Specification | Fronius Symo Advanced 24.0-3 480 | Fronius Verto Plus 30.0 | Solinteg MHT-30K-100 |
|---|---|---|---|
| Role | Grid-tied string, no battery port listed | Hybrid-capable, one battery input | Hybrid, battery input |
| Rated AC power | 24 kW (23,995 W max) | 29.99 kW | 30 kW (33 kVA max) |
| Grid connection | 480/277 V WYE, 60 Hz | 380, 400, 440 or 480 V, 50 or 60 Hz | 220/380, 230/400 or 240/415 V, 50 or 60 Hz |
| MPP trackers | 2 | 3 | 4 (two inputs each) |
| Max PV array power | 36 kWp | 45 kWp | 45 kW recommended |
| MPP voltage range | 500 to 800 V | 150 to 870 V (400 to 870 V at full power) | 200 to 850 V, start at 135 V |
| Max input current | 51 A combined (Fronius Canada page) | 28 A per string | 30 A per tracker |
| Battery voltage and current | none listed | 150 to 700 V, 50 A, 35 kW max | 135 to 750 V, 100 A, 30 kW max charge |
| Max efficiency | 98% | 98.15% | 98.8% |
| European or CEC efficiency | CEC 97 to 97.5% (US weighting) | European 97.35 / 97.96 / 97.57% at 360 / 600 / 870 V | European 98.3% (no voltage stated) |
| Protection class | NEMA 4X | IP66 | IP65 |
| Weight | 43.4 kg | 43 kg | 72 kg |
| Operating temperature | -40 to +60 C | -40 to +60 C | -30 to +60 C |
The Symo column's efficiency cells come from a datasheet table whose columns blur together when the PDF is converted to text, so treat the 98% and the CEC range as approximate and read the original PDF before you rely on them. CEC is a US weighting method, and it isn't interchangeable with the European weighting in the other two columns.
How Do the Verto Plus 30.0 and the MHT-30K-100 Compare?
Now we have two machines for the same job. The differences are real, and they don't all point the same way.
The DC and battery side
Solinteg gives you four trackers against Fronius's three, and a battery port that tolerates twice the current. The arithmetic matters here. Power is voltage times current, so at a pack voltage of 400 V the Fronius port, limited to 50 A, tops out near 20 kW. The Solinteg port, limited to 100 A, could pass 40 kW, but its datasheet caps battery charging at 30 kW. At 700 V the Fronius port reaches its quoted 35 kW. Which matters more depends on the battery you choose; a high-voltage pack that sits near 700 V narrows the gap.
Fronius resolves the MPP window better. Its table gives 400 to 870 V for running at full power, which is the number a string designer actually needs. Solinteg's datasheet gives a wider 200 to 850 V tracking range and a 135 V start, but no full-power window. The datasheet also footnotes that the PV maximum input voltage is 850 V, otherwise the inverter will wait, even though the headline says 1,000 V. That's the kind of detail worth catching before a cold morning pushes open-circuit voltage up.
Efficiency
Solinteg's headline is better. 98.8% maximum against 98.15%, and 98.3% European against Fronius's 97.35% to 97.96%, depending on DC voltage. The weighted gap runs from about 0.34 to 0.95 percentage points.
Is that big? Take an illustrative array producing 30,000 kWh a year, which assumes roughly 1,000 kWh per kWp. Then 0.34 points is about 100 kWh and 0.95 points is about 285 kWh. Not nothing, and not a reason on its own to pick a brand. Two caveats keep me from calling it a win. Both numbers are manufacturer claims, and Solinteg's single European figure gives no test voltage while Fronius shows how its figure moves with it. And Solinteg's own newer M2HT 10-30K line, covered below, quotes 97.2% European. Within one catalog, the "Solinteg 30 kW" number runs a full point apart.
Backup
Both claim 3-phase backup at rated power. Fronius's manual lists Full Backup at 29.99 kW, with a boost to 50 kVA for 5 to 10 seconds, and gives a switching time of under 35 seconds in the default mode, or under 20 ms with its rapid switch mode. That mode needs a Fronius Backup Controller 63A. The smaller Backup Controller 3P-35A is footnoted as compatible only with the Verto Plus 15.0 to 20.0, and the rapid switch instructions name the 63A unit.
Solinteg's datasheet gives a flat on and off-grid switching time of under 20 ms, 120% backup for 60 seconds and 100% unbalanced output. The Fronius 30.0 column states no unbalanced-load figure. The 15.0 column, for comparison, lists a maximum asymmetry of 25 A. If your backup loads are single-phase heavy, ask Fronius in writing what the 30.0 allows.
Hardware
The Fronius weighs 43 kg against 72 kg, carries IP66 against IP65, runs about 56.7 dB(A) against a Solinteg figure under 50 dB, and tolerates -40 C against -30 C. If one person has to lift it onto a wall bracket, weight decides. If the wall faces a quiet garden, noise might.
What About Solinteg's Newer M2HT Line?
"Solinteg 30 kW" now describes more than one machine. The MHT-30K-100 above is the older generation. Solinteg's website lists an M2HT 25-50 kW family with 30K-150 and 29.9K-150 models: four trackers at 40 A each, a battery range of 150 to 840 V, 150 A charge and discharge, a switchover under 10 ms and 150% backup for 10 seconds. A pv magazine report from 17 August 2026 describes a separate M2HT 10-30K line with two independent battery ports at 40 A each, 97.7% maximum efficiency and 97.2% European.
Three Solinteg products, three sets of numbers. A quote that says "Solinteg 30 kW hybrid" without a model code is incomplete, and I'd treat it as unfinished paperwork.
Which Would I Specify?
My opinion, and plenty of installers will disagree: for a 400 V site with storage, I'd look hardest at the Solinteg on paper, because 100 A of battery current and four trackers solve real design problems that three trackers and 50 A do not. The efficiency edge is a bonus, not the reason.
The Fronius earns its place on three counts. It lists a 480 V connection when the Solinteg datasheet doesn't. It resolves efficiency against DC voltage, which lets you check your own string design instead of trusting a headline. And it weighs 29 kg less. If you're on a 480 V North American site, the choice is already made for you.
As for the Symo 24.0: if there's no battery in the plan, it's a perfectly sensible string inverter. If a quote pairs it with a battery, ask which inverter the battery connects to, because the Symo itself lists no battery port. The honest answer is probably an AC-coupled battery inverter, and then the quote is for two boxes, not one. Our battery inverter comparison explains the coupling choices, and the earlier Fronius and Solinteg piece covers the 3 to 10 kW residential models. For supply-side limits on a three-phase service, see how solar works with 3-phase power.
Summary
The Fronius Symo Advanced 24.0-3 480 and a Solinteg 30 kW hybrid don't compare: the Symo is a grid-tied 480/277 V, 60 Hz string inverter with no battery port, while the MHT-30K-100 is a hybrid for 400 V grids. The right Fronius match is the Verto Plus 30.0. Against it, the Solinteg MHT-30K-100 lists four trackers, 100 A of battery current and 98.3% European efficiency, while Fronius lists three trackers, 50 A, a lower weight of 43 kg, IP66, a 480 V option and efficiency resolved by DC voltage. Solinteg also sells newer M2HT 30 kW-class models with different numbers, so a model code matters more than a brand name. Verify every figure against the current datasheet before you sign.