Small-scale and three-phase solar energy systems don’t necessarily go hand in hand. When three-phase energy supply exists in a residential scenario, solar and battery options tend to become quite limited. With such limitations at play, is the Fronius Symo inverter range going to be a suitable solution for your three-phase power supply requirements?
.Make and model: Fronius Symo.
Variants: 3 / 4 / 5 / 6 / 7 / 8.2 kW.
CONTENTS - The information you need, fast!
Fronius inverters, in general, have a good reputation, but this doesn’t automatically define the Fronius Symo as the best solar inverter for your three-phase power supply.
Assessing the essential criteria of Design, Features, Performance, Guarantee and Software, explore the Fronius Symo inverter against the industries best-known specifications. With the critical information at hand, gauge whether the Fronius Symo is the right fit for what you expect from a three-phase solar inverter technology.
The Fronius Symo overall design is very similar to that of its single-phase counterpart, the Fronius Primo. A highly efficient transformerless design built to accommodate a wide variety of solar array formations. Supported by an IP65 weather rating, the Fronius Symo can be mounted both indoors and out, ideally with protection from direct sunlight.
With no change for over 5-years the controlled air cooling by an internal fan provides excessive noise as opposed to convection cooling. Battery compatibility can be distributed across three-phases through a DC coupled solar battery such as the SolarWatt matrix. A solution which does not provide an emergency power supply function in the event of a grid failure. Alternatively, AC coupled battery compatibility is the only solution.
FroniusSymo Design; VERY GOOD
- AC Coupled battery compatibility.
- No change for the last 5-years.
- Fan Cooled.
- Major internationally recognised award.
- TÜV Reihnland certified.
- IP 65.
The Fronius Symo excels within the features department. An inbuilt DC isolator reduces the need for additional isolation points. WiFi or Ethernet communication capabilities facilitate access to the feature-rich Fronius Solar.web monitoring portal. Additionally, an advanced shadow management protocol in the form of Dynamic Peak Manager heightens the production of the dual MPPT DC input.
Lacking a Fronius supplied module-level optimisation option, such can be achieved through the Tigo range if requirements exist. Although, Fronius do have module-level rapid shutdown add-ons available if required (as in the US). For advanced consumption monitoring insight, the Fronius Smart Meter is an essential feature add-on.
FroniusSymo Features; SUPERIOR
- 2 MPPT.
- LCD graphic interface.
- WiFi & Ethernet inbuilt.
- No manufacturer supplied module-level optimisation options.
- Manufacturer supplied module-level rapid shutdown options.
- Manufacturer supplied expanded monitoring options.
- Nominated shadow management protocol onboard.
- Remote access firmware updates.
An admirable performer, the Fronius Symo has an above-average European weighted efficiency of up to 97.5% which derates beyond 40°C (140°F). With such, Fronius Symo’s can endure environmental conditions ranging between -25°C to +60°C (-13°F to +140°F) with a 100% permitted humidity.
Weight ranges from 19.9kG (43.8 lbs) to 21.9kG (46.3 lbs) in larger models. While caution should be exercised in noise-sensitive mounting locations as noise emission criteria rank as “not listed” earning the lowest possible mark in this area. Possibly a gauge, the Fronius Primo max noise emission level is 65 dB(A).
FroniusSymo Performance; SUPERIOR
- 97.5% European weighted efficiency.
- Min temp range -40°C (-40°F).
- Max temp range +60°C (140°F).
- Temp derating 40°C (104°F).
- Weight 19.9 kg (43.8lbs).
- Noise emission (not listed) dB (A).
A 10-year warranty activated upon installation via a Fronius trained installer network ensures an OUTSTANDING warranty for the end-user. For non-Fronius partners, the base Fronius Symo inverter guarantee is an industry average 5-year parts and labour warranty with expandable warranty options available for purchase through Fronius. However, cost and availability vary depending on the country of which the installation occurs.
FroniusSymo Guarantee; OUTSTANDING
- 10-year parts warranty.*
- 10-year service warranty.*
- *Authorised installer network with additional end-user benefits.
A cut above most other manufacturer supplied monitoring options. See the full Fronius Solar.web monitoring software review for more insight > (Coming Soon).
FroniusSymo Software; SUPERIOR
- Fronius Solar.web
- iOS & Android app.
- Alerts & fault diagnosis.
An inspiring three-phase residential solar inverter of the previous decade, the Fronius Symo has won consistent favour among both industry professionals and end-users. As we now progress into the new decade, a refreshed design remains eagerly anticipated.
However, with such a well built three-phase solar inverter, Fronius can continue to leverage off the success a little longer with limited competition in the small-scale three-phase division. The Fronius Symo is a SUPERIOR three-phase inverter which has proven the test of time.
FroniusSymo Overall; SUPERIOR
- Design 3.7
- Features 4.1
- Performance 3.9
- Guarantee 5.0
- Software 4.0
*AVG references industry average specifications.
How was the score for the Fronius Symo solar inverter calculated? By using the Solar Review Inverter Assessment Criteria V2.5 >
How does the entire current range of Fronius solar inverters compare against each other? Discover now >