[UK] Are there any G98/G99-compliant "cloud"-free microinverters?

[solartist]

As mentioned in my main thread, I am seeking a solar solution in England that does not require the use of proprietary (non-FOSS) software: not locally (smartphone app, etc) nor server-side ("cloud").

However, microinverters would be a good fit for my situation, because I want to end up with panels on at least:

• front roof slope (which has shading from neighbour's chimneys for part of the day)
• rear roof slope (ditto)
• rear wall of house (typically not shaded, unless neighbour builds an extension), but obviously different shape to rear roof slope and would likely require different panels
• outbuilding (still at design stage - not sure of final roof size/orientation).

With a conventional inverter, this will require at least 4 strings and probably some Tigo optimisers. If I go with that approach, then it reduces future flexibility.

Microinverters offer more flexibility for PV panel installation. Unfortunately, though, all the UK G98/G99 compliant options seem to require proprietary cloud connectivity

• Enphase microinverters seem to require the presence of an Envoy gateway connected to Enphase's cloud monitoring.
• Hoymiles microinverters might be technically capable of running without cloud connectivity? But according to Midsummer, "All Hoymiles installations must be installed with a DTU monitoring device for G98 compliance. Hoymiles need to be notified once online so that firmware upgrades can be carried out remotely." The DTU device is an internet-connected gateway to the Hoymiles cloud.
• TSun microinverters claim G98 compliance, but the user manual shows they require a proprietary smartphone app.

This leads me to ask: are there any microinverter systems that are G98 & G99 compliant without needing an ongoing connection to a proprietary "cloud" service or a proprietary app?

Thanks in advance!

 

[selbstbau-pv.de]

I think you can use Hoymiles Microinverter with opensource OpenDTU Datalogger unit. The unit is based on free software an ESP32 Microcontroller. So you have a solution without the Cloud of the Manufacture.

GitHub - tbnobody/OpenDTU: Software for ESP32 to talk to Hoymiles/TSUN/Solenso Inverters

Software for ESP32 to talk to Hoymiles/TSUN/Solenso Inverters - tbnobody/OpenDTU

github.com

There a many TSUN Models thats OEM products from Hoymiles, they should work with OpenDTU. There is a compability table.

We build a zero export soltion for the OpenDTU unit:

Smart Micro Solar - openDTU Nulleinspeisung - selbstbau-pv.de

Smart Micro Solar ist eine clevere Lösung für die mühelose Umsetzung einer Nulleinspeisung in Verbindung mit einem Smartmeter und openDTU. Diese kompakte Steuerung mit benutzerfreundlichem Display ermöglicht eine einfache Konfiguration über ein WLAN-Webinterface.

selbstbau-pv.de