March 9, 20233 yr Hi there I have a Luxpower 5Kw SNA Invertor with a Shoto 5.12kwh battery. This was installed in December 2022. The installer obtained the settings for this from the supplier and inputted them. Since December, the fuse is keeps blowing my AV receiver (around 5 times now). The AV receiver has a few fuses, however the one that goes is related to its power supply. The seems to happen when the power swaps over from Eskom to battery. The AV receivers has been to the agents a few times and they have confirmed that there is nothing wrong with it. They have actually changed all of the parts related to the blown fuses hence we have struck off the AV receiver failure. The electrician said that he did the tests and the voltage is fine however it cant be fine if the AV receiver keeps blowing fuses. Please can you provide some guidance.
March 22, 20233 yr Author 54 minutes ago, RobMB said: Hi there, No reply or solution. I was hoping someone on the forum could assist.
April 6, 20233 yr On 2023/03/09 at 3:06 PM, User12345 said: Hi there I have a Luxpower 5Kw SNA Invertor with a Shoto 5.12kwh battery. This was installed in December 2022. The installer obtained the settings for this from the supplier and inputted them. Since December, the fuse is keeps blowing my AV receiver (around 5 times now). The AV receiver has a few fuses, however the one that goes is related to its power supply. The seems to happen when the power swaps over from Eskom to battery. The AV receivers has been to the agents a few times and they have confirmed that there is nothing wrong with it. They have actually changed all of the parts related to the blown fuses hence we have struck off the AV receiver failure. The electrician said that he did the tests and the voltage is fine however it cant be fine if the AV receiver keeps blowing fuses. Please can you provide some guidance. is your “ac input range” set to apl or ups? ask you installer to go the lux power portal then go to the “maintain” tab…. Then hit the “read” button and post all of the configured settings here
April 11, 20233 yr 4 hours ago, User12345 said: I think it is UPS. Should it be changed to APL? I am not sure if the UPS in the pic is the setting we are looking for and I don't have a unit to test with. But yes it it must be on UPS not appliance, on UPS switching time is 10ms faster Not sure why you guys are having fuses blow on your amplifiers, do you have an Earth Leakage fronting this plugs ? Usually this would be the first thing to trip if something is not right
April 13, 20233 yr I have exactly the same issue. Pops fuses of anything that has a transformer connected straight after the fuse. Amps, Powered Subwoofers, Alarm charger, etc. My dimmable LED downlights also turn off when this change over happens. Also have a cheap UPS on my PC, the UPS always beeps as if power goes off for a second or two, then back to normal. Normally happens when load shedding starts, IE when inverter switches from grid to battery. The fuses that blow point me to a voltage drop that occurs when the change over happens. Been talking to LuxPower support, they have updated firmware twice now - obviously making no difference. Utterly frustrating experience dealing with them. At least they always respond... On previous questions asked: Yes i have surge arrestors, yes there is an earth leakage, even have those protection plugs on my amplifiers, but it still happens.. There are a couple of others too with the same issue: Where to next? LuxPower seems unwilling to confirm this is an issue, and their technical support not very knowledgable. Not sure how to solve this, other than replacing the inverter with a different brand.
April 13, 20233 yr Author On 2023/04/06 at 7:13 PM, Treschen said: is your “ac input range” set to apl or ups? ask you installer to go the lux power portal then go to the “maintain” tab…. Then hit the “read” button and post all of the configured settings here
April 13, 20233 yr Author I sent an email to Luxpower and received no reply. [email protected] . Do you perhaps have another email address for Luxpower support?
April 13, 20233 yr I used [email protected] Good luck, it's a frustrating process to communicate with them. (my bet is all they will do for you is update your firmware ) Please let us know here if you do come right.
April 13, 20233 yr 1 hour ago, HenkFR said: I have exactly the same issue. Pops fuses of anything that has a transformer connected straight after the fuse. Amps, Powered Subwoofers, Alarm charger, etc. My dimmable LED downlights also turn off when this change over happens. Also have a cheap UPS on my PC, the UPS always beeps as if power goes off for a second or two, then back to normal. Normally happens when load shedding starts, IE when inverter switches from grid to battery. The fuses that blow point me to a voltage drop that occurs when the change over happens. Been talking to LuxPower support, they have updated firmware twice now - obviously making no difference. Utterly frustrating experience dealing with them. At least they always respond... On previous questions asked: Yes i have surge arrestors, yes there is an earth leakage, even have those protection plugs on my amplifiers, but it still happens.. There are a couple of others too with the same issue: Where to next? LuxPower seems unwilling to confirm this is an issue, and their technical support not very knowledgable. Not sure how to solve this, other than replacing the inverter with a different brand. Okay that sucks then, all I can help with is below screenshots of a luxpower connected to a Pylontech UP5000, best is ask your installer to pull it out and take it back to the distributor for assessment
April 16, 20233 yr I was having this same problem when I installed my SNA5000 inverter, it would blow the fuse on my Logitech Z5500 surround sound system, solved it by upping the UPS voltage setting to 230V, it was set at 220V, this solved the problem for me.
April 17, 20233 yr Seems I finally resolved my issue too. 1. I changed setting 13 from APL to UPS 2. I installed a earth - neutral bond on the inverter output ( I was under the impression it had one internally, but obviously not...)
April 17, 20233 yr 28 minutes ago, HenkFR said: Seems I finally resolved my issue too. 1. I changed setting 13 from APL to UPS 2. I installed a earth - neutral bond on the inverter output ( I was under the impression it had one internally, but obviously not...) Glad you sorted, I wonder when they stopped bonding internally. I have have personally tested this on the earlier models needless to say we have not installed any of the newer units
April 21, 20233 yr Author On 2023/04/17 at 8:47 AM, Treschen said: Glad you sorted, I wonder when they stopped bonding internally. I have have personally tested this on the earlier models needless to say we have not installed any of the newer units Hi there Do you know any installers in Cape Town area that can do the neutral internal bonding for me?
April 21, 20233 yr 1 hour ago, User12345 said: Hi there Do you know any installers in Cape Town area that can do the neutral internal bonding for me? Any legit sparky with a good knowledge of how a contactor works can do it.
April 21, 20233 yr Just to add to the fuse blowing. It has been reported to us from an installer that quite a few customers have had fuses blowing wired before a transformer on our PSUs when the same PSUs are fed from an inverter. It only happens when the grid returns. In this case the solution was to increase the fuse from 200mA to 500mA which is still a low value. It would be interesting to know if users of other than Luxpower experience this. When such a thing is mentioned they normally cannot provide what make of inverter it happens.
April 21, 20233 yr 9 minutes ago, Scorp007 said: Just to add to the fuse blowing. It has been reported to us from an installer that quite a few customers have had fuses blowing wired before a transformer on our PSUs when the same PSUs are fed from an inverter. It only happens when the grid returns. In this case the solution was to increase the fuse from 200mA to 500mA which is still a low value. It would be interesting to know if users of other than Luxpower experience this. When such a thing is mentioned they normally cannot provide what make of inverter it happens. This just masks the problem. It's definitely not a viable solution in my opinion. A fuse is specked 200mA for a reason. If it is when grid returns, it means the grid voltage is lower than what the inverter output was. So either the input from grid is too low, or the inverter output too high V. You can easily track these 2 voltages in app / LuxPower monitor site.
April 21, 20233 yr 56 minutes ago, HenkFR said: This just masks the problem. It's definitely not a viable solution in my opinion. A fuse is specked 200mA for a reason. If it is when grid returns, it means the grid voltage is lower than what the inverter output was. So either the input from grid is too low, or the inverter output too high V. You can easily track these 2 voltages in app / LuxPower monitor site. I agree on the fuse size. I did not agree but those higher up in the pecking order see it fit. My 1st reaction was also find the problem on the inverter side as the grid by itself does not blow the fuse.
April 21, 20233 yr 1 hour ago, HenkFR said: If it is when grid returns, it means the grid voltage is lower than what the inverter output was. How did you get to that conclusion?
April 21, 20233 yr 7 minutes ago, P1000 said: How did you get to that conclusion? If there is a voltage drop the current will increase and pop the fuse. P = I x V So say you are now running your 40W appliance on your inverter that outputs 230V. I = P / V I = 40 / 230 I = 0.17 A. So your appliance is drawing 170mA from the inverter supply, and your 200mA fuse is happy. Now the grid comes back, but only supplies 180V. Not 230. Even if it is just for a second. I = P / V I = 40 / 180 I = 0,22 A And there your 200mA fuse POPs within milliseconds. By the time you get to measure your grid output, it has gone up from the initial 180V and stabilized hopefully at 230V.
April 21, 20233 yr 18 minutes ago, HenkFR said: If there is a voltage drop the current will increase and pop the fuse. This is only true if the power supply is a switch mode. Since it is stated that this affects devices with (lf) transformers, it's much more likely that they have linear PSUs which makes your theory fall on it's face...
April 21, 20233 yr 16 minutes ago, HenkFR said: If there is a voltage drop the current will increase and pop the fuse. P = I x V So say you are now running your 40W appliance on your inverter that outputs 230V. I = P / V I = 40 / 230 I = 0.17 A. So your appliance is drawing 170mA from the inverter supply, and your 200mA fuse is happy. Now the grid comes back, but only supplies 180V. Not 230. Even if it is just for a second. I = P / V I = 40 / 180 I = 0,22 A And there your 200mA fuse POPs within milliseconds. By the time you get to measure your grid output, it has gone up from the initial 180V and stabilized hopefully at 230V. 100 percent correct sir the lower the voltage the more current the devices will pull. I would suggest in this case one could use a AVS30 before the supply to luxpower on the grid side. We have used a few AVS30s for these cases and it works well. We have had instances where customers grid supply is constantly low, we had to install CVTs to protect the inverter as AVS30 was constantly holding back from supply grid back to inverter.
April 21, 20233 yr 20 minutes ago, HenkFR said: And there your 200mA fuse POPs within milliseconds. Most likely your 200mA fuse won't "POP" at all with 220mA applied, and if it does it will take a while. (the 200mA fuse curve never even crosses the 300mA line...)
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