Hello having a new instal completed next week x LONGi 440w Black Frame Hi-MO6 (LR5-54HTH440M (IEC 61215-2021))
1 x FoxESS 9.9kW 1Ph Hybrid 4MPPT (KH9.9 (AS4777-
2 2020))
1 x FOXESS 4.66kWh x 9 Battery (EQ4800-L9) - (Usable
Capacity: 41.93)
1 x Blackout (Backup) for Essential Load
4 x Tigo Optimiser 700 (TS4-A-O)
Is there anything specific that I should be asking/telling the installer.
Re: New instal
Posted: Sat Nov 22, 2025 9:14 am
by Will
Hello,
That is a top spec, flagship configuration, and you'll be very pleased with it.
The most common issue I've seen recently is when the installer doesn't use the IP-rated plug ends for the wire between the inverter and the battery when it's being installed outdoors. If indoors it's not required but if outdoors, make sure the coms cable is using the included weather-proof connection.
Also, make sure you ask the installer to install the latest inverter and battery firmware as this is often overlooked.
I did a video on it here:
Re: New instal
Posted: Sat Nov 22, 2025 10:23 am
by Diesel07
Thanks Will, much appreciated.
Re: New instal
Posted: Sun Jan 18, 2026 5:42 am
by Diesel07
Update on the instal.....
Some small issues were the installer I think has miss judged his time to install(my instal also involved removing & disposal of an old 3.8kw system) anyway after 3 return trips it's all up & running.
Installer didn't have the correct settings(battery was charging from the grid - W.T.F) after some help here & watching a few utubes I've logged into the inverter & sorted that all out(put my own settings in from suggest read on this wonderful forum)
System runs fault less & I'm so very happy with it. Had a few really hot days here recently(Sydney Australia) ran A/C continuously through the day/night then right after was cloudy days with rain, but system was still that good(took a while for battery to charge back to 100%) all in all I've worked out it cost me $3(large house 6 people) so an awesome job.
As I said so very happy, I've also built a weather cover & shade cloth protection for the system(all from second hand items I either had lying around or collected from free pick ups - the only things I had to buy were the mounting hardware for the covers wall brackets) I've kept an eye on it(battery/inverter)with the recent hot weather & then rain & looks like battery & inverter are well protected.(I've attached a few pictures - doesn't look pretty but it works)