Name: Fronius Symo GEN24 3.0 Plus
Brand: Fronius

Question 1

What size array does the Fronius Symo GEN24 3.0 Plus suit?

Accepted Answer

The Fronius Symo GEN24 3.0 Plus is rated at 3000 W of nominal AC power and 3000 W maximum, so there is no AC overload headroom above that figure: an array of roughly 3 kW, modestly oversized on the DC side, is the natural match. It is a small three-phase unit, aimed at a house that already has a three-phase supply.

Question 2

What grid connection does the Fronius Symo GEN24 3.0 Plus need?

Accepted Answer

The Fronius Symo GEN24 3.0 Plus is a three-phase inverter listed as 3~NPE 230 V / 400 V, with 3~NPE 220 V / 380 V as an alternative configuration, at 50 or 60 Hz. Each pair of numbers describes one four-wire connection: 230 V from each phase to neutral and 400 V between phases. An ordinary single-phase service will not do.

Question 3

How do the 125-800 V MPPT window and 1000 V limit of the Fronius Symo GEN24 3.0 Plus shape string design?

Accepted Answer

The Fronius Symo GEN24 3.0 Plus tracks between 125 V and 800 V and withstands 1000 V of DC input voltage. Strings have to stay above 125 V when hot and below 1000 V at the coldest sunrise, but the practical ceiling for normal operation is the 800 V top of the tracking window rather than the 1000 V rating.

Question 4

How much current can each MPPT input of the Fronius Symo GEN24 3.0 Plus take?

Accepted Answer

Each of the two MPPT channels on the Fronius Symo GEN24 3.0 Plus accepts a maximum DC input current of 12.5 A, the same limit on both inputs. That is enough for one string of ordinary modules per channel but leaves little margin to parallel two strings on a single input, so a 3 kW array is best split into two separate strings.

Question 5

How efficient is the Fronius Symo GEN24 3.0 Plus?

Accepted Answer

The Fronius Symo GEN24 3.0 Plus reaches 98.1 percent maximum efficiency but 96.7 percent European efficiency. That 1.4 point gap reflects part-load behaviour, since a small inverter spends much of the year well below its 3000 W rating. Use the 96.7 percent figure for yield estimates, which puts conversion losses at roughly three percent of the array's DC output.

Question 6

Can the Fronius Symo GEN24 3.0 Plus be mounted outdoors?

Accepted Answer

The Fronius Symo GEN24 3.0 Plus carries an IP66 rating and a declared operating range of -25 to +60 degrees Celsius, so an outdoor wall position stays within specification. At 15.61 kg one installer can lift it onto the bracket, and the transformerless topology recorded for it means no internal isolating transformer adds either mass or a further conversion stage.

Maximum Efficiency	98.1 %
European Efficiency	96.7 %

MPPT Voltage Range	125-800 V
Maximum DC Input Voltage	1000 V
Number of MPPT Channels	2
Maximum DC Input Current per MPPT	12.5 A

AC Output Voltage	3~NPE 230V / 400V, 3~NPE 220V / 380V V
AC Output Frequency	50 / 60 Hz

Weight	15.61 kg
Enclosure Protection Rating	IP66
Operating Temperature Range	-25 - +60 °C

Fronius Symo GEN24 3.0 Plus

Technical Specifications

Frequently asked questions