Own The PeakEnergy, from the household side
Search
Menu

An Australian field guide

1 What you actually own

What is on your wall, and what the paperwork says it is.

Written 26 Oct 2026Last checked not yetApplies to SigenStor EC 20.0 TP AU, firmware SPC109 or newer (to verify)Stage Field note

What the certificate says

The Certificate of Electrical Safety is the record of what was built: 19.38 kW of solar, a 48.36 kWh battery and a 20 kW controller, with the export limit for this connection set at 5 kW per phase (15 kW). Its serial numbers have to match the units on the wall. Keep it.

The controller

The unit on the wall is a SigenStor EC 20.0 TP AU. Calling it a solar inverter with a battery option undersells it. It is a three-phase 20 kW bidirectional energy controller with four independent MPPT trackers, up to 32 kW of DC input, and a backup (EPS) output that switches over in 0 ms (manufacturer’s figure).

The four trackers matter on a real roof. Each can face a different direction and find its own maximum power point, so a roof with awkward planes does not have to be averaged into one compromise.

The SigenStor system layoutFour roof strings feed the controller. The controller charges and discharges a stack of six battery modules, supplies the home loads, and exchanges power with the grid through the Gateway. Some circuits sit on the grid side and are not backed up.String 1String 2String 3String 4EC 20.0 TP AU20 kW · 4 MPPT · EPS6 × BAT 8.048.36 kWh grossHome loadsGatewaySmart loadsGridGrid-side circuits
Sun in at the top, battery and house below, the Gateway between the controller and the grid. The dashed box is circuits on the grid side of the Gateway; they are not backed up. illustrative

The battery modules

The battery is a stack of SigenStor BAT 8.0 modules: lithium iron phosphate, 8.06 kWh gross and 7.8 kWh usable each. Six modules give the 48.36 kWh on the certificate, and 46.8 kWh usable on the module figures. My warranty gives 10,000 cycles, 70% capacity retention at ten years, and a minimum throughput of 23.77 MWh per module.

That throughput figure is the one to do your own sum on. Six modules at 23.77 MWh is 142.6 MWh. Moving 30 to 40 kWh through the battery a day is 10.9 to 14.6 MWh a year, so reaching the floor would take roughly 10 to 13 years. Check how your own document defines throughput (energy in, energy out, or both) before relying on it.

Left to right: Gateway, controller, battery stack.

The Gateway

The Gateway (Gateway Home TP AU) is a separate unit. It provides the Smart Load dry-contact outputs, 24 of them, for switching appliances directly, and the SG-Ready interface for a heat pump. Its warranty is five years, half that of the battery and controller. It can be installed and never connected to anything, so check whether yours is doing any work.

Strings and the azimuth trap

Before you automate anything, write down which panels are on which tracker and which way each faces. The mySigen app shows power per string. Check it against the sun: a north-facing string should peak around midday, an east-facing one in the morning, a west-facing one in the afternoon. If a curve does not make physical sense, your notes about the roof are wrong.

Per-string power on a clear dayThree idealised curves: an east-facing string peaking in the morning, a north-facing string with a broad peak at midday, and a west-facing string peaking in the afternoon.6 ammidday6 pmEast: morningNorth: broad, middayWest: afternoon
What each string should look like on a clear day. illustrative
N 0° (HA)S 0° (FS)E 90°WGotcha · two azimuth conventions

The Forecast.Solar service counts 0° as south, with west positive and east negative. The Home Assistant integration screen asks for a standard compass bearing: 0° is north, 90° is east. Type a bearing into the wrong convention and the forecast models a different house. Always check one forecast curve against one string curve. Read the field labels on your own screen.

Register it

Gotcha · registration is manual

Registering the system in the mySigen app is what starts your warranty paperwork, and it does not complete by itself. Do it yourself and confirm every serial number against the certificate. My warranty starts on the installation date, not the day of registration; confirm that in your own warranty document.

Related