Lux Inverter Problem

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Stinsy
Posts: 3025
Joined: Wed Jun 02, 2021 1:09 pm

Lux Inverter Problem

#1

Post by Stinsy »

Hi all!

Yesterday morning my Luxpower inverter stopped charging the batteries on cheap rate electric at 82% (it was programmed to charge them to 100%). Since then it hasn't charged or discharged them at all. It shows no errors. Yesterday we had some sunshine and the inverter acted as a solar inverter but the batteries did nada.

I've checked the connections and power-cycled the inverter. But nada.

What do you guys suggest?
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
5x 2.4kWh Pylontech batteries (12kWh)
LuxPower inverter/charger

(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
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Krill
Posts: 417
Joined: Fri Sep 02, 2022 4:38 pm

Re: Lux Inverter Problem

#2

Post by Krill »

What is the BMS saying?
Solar PV: 6.4kW solar PV (Eurener MEPV 400W*16)
PV Inverter: Solis 6kW inverter
Batteries: 14.4kWh LiFePO4 batteries (Pylontech US5000*3)
Battery Inverter: LuxPowertek 3600 ACS*2
EV: Hyundai Kona 65kWh
WBS: 8kW Hunter Avalon 6 Multifuel burner (wood only)
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Stinsy
Posts: 3025
Joined: Wed Jun 02, 2021 1:09 pm

Re: Lux Inverter Problem

#3

Post by Stinsy »

Krill wrote: Mon Dec 30, 2024 9:39 am What is the BMS saying?
As reported by the inverter:

Image
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
5x 2.4kWh Pylontech batteries (12kWh)
LuxPower inverter/charger

(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
Thebeeman
Posts: 228
Joined: Tue Jun 14, 2022 8:56 am

Re: Lux Inverter Problem

#4

Post by Thebeeman »

I have a AC coupled Luxpower for the batteries and Fronius for the solar. My plan A is always turn everything off, batteries and inverters, leave for 30 secs and turn on again, it's worked every time so far when something loses the plot.
Second thoughts: Did it run out of charge time before the 100% mark?
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Stinsy
Posts: 3025
Joined: Wed Jun 02, 2021 1:09 pm

Re: Lux Inverter Problem

#5

Post by Stinsy »

Thebeeman wrote: Mon Dec 30, 2024 11:19 am I have a AC coupled Luxpower for the batteries and Fronius for the solar. My plan A is always turn everything off, batteries and inverters, leave for 30 secs and turn on again, it's worked every time so far when something loses the plot.
I've tried that. Maybe I didn't leave it "off for long enough". However I think a component might have let the smoke out. Interesting that the inverter shows no errors it just doesn't charge/discharg the batteries. It measures the battery voltage fine, and powers itself from the batteries.
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
5x 2.4kWh Pylontech batteries (12kWh)
LuxPower inverter/charger

(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
User avatar
Stinsy
Posts: 3025
Joined: Wed Jun 02, 2021 1:09 pm

Re: Lux Inverter Problem

#6

Post by Stinsy »

Right. I took the cover off and I think I've found why power-cycling the inverter hasn't solved the issue:


Image
Last edited by Stinsy on Mon Dec 30, 2024 1:14 pm, edited 1 time in total.
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
5x 2.4kWh Pylontech batteries (12kWh)
LuxPower inverter/charger

(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
resybaby
Posts: 326
Joined: Thu Aug 17, 2023 3:33 pm
Location: Cornwalls North Coast

Re: Lux Inverter Problem

#7

Post by resybaby »

Doesnt look so healthy Stinsy, fingers crossed that circuit board is replacable and you can put your hands on one asap.
4.0kw FIT PV solar Sunnyboy 4000tl & 7 x 570w JA solar panels
7.08kw JA Solar panels & Sunsynk ECCO 3.6kw.
7 x US5000 Pylontechs.
4500l RWH
Full Biomass heating system
iBoost HW divertor
Full house internal walls insulation
600min Loft insulation
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Krill
Posts: 417
Joined: Fri Sep 02, 2022 4:38 pm

Re: Lux Inverter Problem

#8

Post by Krill »

Yeah, I was going to say that with the information in post 5 it sounded like the switch which flips the contacts between discharge and import was broken, and there's the proof.
Solar PV: 6.4kW solar PV (Eurener MEPV 400W*16)
PV Inverter: Solis 6kW inverter
Batteries: 14.4kWh LiFePO4 batteries (Pylontech US5000*3)
Battery Inverter: LuxPowertek 3600 ACS*2
EV: Hyundai Kona 65kWh
WBS: 8kW Hunter Avalon 6 Multifuel burner (wood only)
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Fintray
Posts: 1622
Joined: Mon May 31, 2021 6:37 pm
Location: Aberdeenshire

Re: Lux Inverter Problem

#9

Post by Fintray »

Is that a component that has blown or a loose connection?
3.87kWp PV
10.24kWp PV SolarEdge system
Tesla Powerwall 2
100 x 47mm Navitron tubes (still being installed!) Now likely to be removed for more PV.
MK2 PV router DHW diverter
Morso 5kW WBS
Vaillant AroTherm 10kW ASHP
Nissan Leaf
Moxi
Posts: 2368
Joined: Sun Oct 31, 2021 3:46 pm

Re: Lux Inverter Problem

#10

Post by Moxi »

Arc inside the switching unit ? Hopefully you will be able to identify it and get a replacement- if it failed fast enough the PCB might be intact and just need a thorough clean to prevent shorting.

Otherwise as previously mentioned a PCB replacement might be quicker easier and less prone to additional faults.

Fingers crossed for you getting a quick resolution.

Moxi
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