Comparison

Fronius Solar.SOS vs OptiMOON

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Fronius Solar.SOS

This business tool helps installers quickly resolve technical issues with solar systems. It allows for easy ordering of replacement parts and provides access to important documentation. The app streamlines the service process directly at the installation site.

Highlights
  • Manage multiple accounts
  • Order replacement parts
  • Track order status
  • Messaging with support
  • Access installation guides
  • Troubleshoot technical issues
Read full description

Fronius Solar.SOS is a self-service solution for all technical queries. This is a business application that installers can use to initiate the service process online directly at the system location - quite simply with the serial number of the inverter or a state code. In the space of a few clicks, Solar.SOS supports installers with troubleshooting and ordering replacement parts. The big advantage is that with this app installers can resolve technical problems themselves at any time. Attention - this app is purely a solution for installers (B2B). Features: - Manage multiple accounts, all from a single account - All orders at a glance (case overview) - Rapid ordering of replacement parts - Check the status of orders with ease - Messaging function with technical support (case messages) - Access to all relevant Installation Instructions and Operating Instructions (YouTube, etc.)

About

OptiMOON

Features
Read full description

OptiMOON connects devices that use, produce or store larger amounts of electricity. It determines when it makes sense to use, produce or store just the right amount of electricity via utilising our AI Strategies. OptiMOON Controller links solar power plants, energy storage systems, heat pumps, and electric chargers to the OptiMOON system. It manages electricity production and consumption, adjusts power draw from the grid, and uses advanced algorithms to ensure cost-effective energy use and maximum self-sufficiency. OptiMOON Gateway This extension of the OptiMOON system converts RS485 serial signals into TCP/IP signals. It is used when the OptiMOON Controller’s two RS485 inputs are insufficient or when the device’s distance makes cable connections impractical. Additionally, the Gateway can control third-party devices via two relay outputs, such as a heat pump using SmartGrid Ready (SG Ready) or an EVU contact. The OptiMOON Converters capture billing measurement data from meters with specific outputs without the need of additional power. The P1 and P1 – WiFi model wirelessly connects meters like the Iskraemeco AM550 to your network via WiFi or cable. The I1 (M-Bus) – Cable model connects meters like the Landis+Gyr E350 and E450 to the OptiMOON controller via a wired connection. We optimize: OptiMOON connects devices that use, produce or store larger amounts of electricity. It determines when it makes sense to use, produce or store just the right amount of electricity via utilising our AI Strategies. Smart EV Charging: When you at your home or in work, your vehicle could and should be charged the way it gets the battery full for the lowest cost possible. This becomes even more important if your company owns and charges multiple vehicles. Demand Response: When there is too much electricity available on the market, the result in low or even negative energy prices. You can benefit by adapting your use or production of energy to match what the market needs: use less or more, depending on the time. Supported devices: OptiMOON can connect to more than 250 devices across 50 brands.

Screenshots

Fronius Solar.SOS4 screens
OptiMOON4 screens

Verdict

The call

The clearest difference is update cadence: OptiMOON at every 3 weeks against Fronius Solar.SOS's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Fronius Solar.SOS ships an update every 3 months, OptiMOON every 3 weeks. The most recent releases landed on August 19, 2026 and September 12, 2026 respectively.

Scorecard1 real difference · 9 level
Fronius Solar.SOS versus OptiMOON: the parameters behind the verdict, then further details
ParameterFronius Solar.SOSOptiMOON
PriceFreeFree
Rating1.5 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.013.0 — better
Further details — not scored
Size15 MB43 MB
Age rating4+4+
DeveloperFronius International GmbHPorsche Slovenija d.o.o

In-app purchases

None

Fronius Solar.SOS

No in-app purchases

None

OptiMOON

No in-app purchases

Questions

Is Fronius Solar.SOS free?
Fronius Solar.SOS is free to download, with no in-app purchases.
Is OptiMOON free?
OptiMOON is free to download, with no in-app purchases.
Do Fronius Solar.SOS or OptiMOON have ads?
Neither Fronius Solar.SOS nor OptiMOON shows ads.
Which is updated more often, Fronius Solar.SOS or OptiMOON?
Fronius Solar.SOS ships an update every 3 months, and OptiMOON every 3 weeks. Most recently, Fronius Solar.SOS was updated on August 19, 2026 and OptiMOON on September 12, 2026.

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