Hi Everyone,
Bit of a strange one, just to give some background; Purchased this cheap PowMr 4200W 24V Solar Inverter Pure Sine Wave Off-Grid With MPPT 120A Charger from eBay.
Everything was good, system installed well, no issues - can't really fault setup and initial use. System was powering 2.5kw easily max and running 500 watts house idle, again didn't seem to be under any stress. I never ran more than kettles/PCs/ low energy ligths - no heavy loads. System ran with zero faults!
Roll on 30 days of continuous use without issue (soon to end).
I was using the AC charger at night to put 60-80 percent back into the batteries 24v Eve 8S1P (using cheap rate electricity we have at night). System again worked perfectly, charged batteries to required percentage... system happily carried on. No solar here in UK as yet (it's winter, no sun here in UK).
Then after about 30 days of use I noticed it was not coming on, did a power cycle - went to power it on ... heard some relays clicking to come on (as it does) and then it would click off again (as I was running it in offline mode on batteries only). While standing there, I heard a very loud pop noise.
Rather than check anything, just contacted my ebay seller, they immediately without question gave me a full refund! I was expecting some back and forth regarding what had happened. They just agreed to refund. Bizarre but very nice outcome... Can't really complain about the process there.
So now I'm left with an inverter that doesn't work and I would really like to repair it, rather than junk it.
I contacted PowMr direct and explained what had happened and I now wanted to repair it for myself, no obligation for them as I had received a full refund and could they help. Unfortunately, they've been particularly unhelpful ... they said they offer no parts for resale, I asked about replacement motherboards for sale. They said, no they don't offer!
So final ask - Would they be willing to send me a circuit diagram/ schematics.
They said they don't know what that is and they don't do that anyway.
I know they are not obligated to help me as it was through a third party seller but it's such a shame they don't offer anything other than 1 sentence emails to questions. I'd love to repair it! Inverters are within my skills and I'm well aware of the high voltages that are in them etc...
Anyway cover is off, all capacitors have had more than enough time to discharge (and will be checked). Annoyingly there is no visible signs of damage from Mosfets or Capacitors. No scorching or any burns whatever (visually inside - I enclose picture). I'm pretty sure the issue is on the DC side as it had AC power and was showing a fault 9 (overload but nothing was running at that time and had no load). The system was running mostly in off-grid mode (except for 4 hours at night).
The pop/bang was loud, I was expecting to see a capacitor had launched it's soul to outer space but nothing is out of place in first level inspection.
Anyone have any experience with fixing these... it's basically free and such a shame to junk it - even if it was crappy and only lasted 30 days.
I'm going to start measuring the 35v capacitors on DC and seeing if they register the right microfarad as that's an easy win. The Mosfets will be next ...
Anyone have any obvious clues as to what might have gone bang (it was more of a loud POP) after some clicking of relays.
Thanks for any help - not sure I can recommend PowMr unfortunately if this is how the quality of the product is and especially how PowMr support people, who offer zero support! I'm lucky I got a full refund.
Bit of a strange one, just to give some background; Purchased this cheap PowMr 4200W 24V Solar Inverter Pure Sine Wave Off-Grid With MPPT 120A Charger from eBay.
Everything was good, system installed well, no issues - can't really fault setup and initial use. System was powering 2.5kw easily max and running 500 watts house idle, again didn't seem to be under any stress. I never ran more than kettles/PCs/ low energy ligths - no heavy loads. System ran with zero faults!
Roll on 30 days of continuous use without issue (soon to end).
I was using the AC charger at night to put 60-80 percent back into the batteries 24v Eve 8S1P (using cheap rate electricity we have at night). System again worked perfectly, charged batteries to required percentage... system happily carried on. No solar here in UK as yet (it's winter, no sun here in UK).
Then after about 30 days of use I noticed it was not coming on, did a power cycle - went to power it on ... heard some relays clicking to come on (as it does) and then it would click off again (as I was running it in offline mode on batteries only). While standing there, I heard a very loud pop noise.
Rather than check anything, just contacted my ebay seller, they immediately without question gave me a full refund! I was expecting some back and forth regarding what had happened. They just agreed to refund. Bizarre but very nice outcome... Can't really complain about the process there.
So now I'm left with an inverter that doesn't work and I would really like to repair it, rather than junk it.
I contacted PowMr direct and explained what had happened and I now wanted to repair it for myself, no obligation for them as I had received a full refund and could they help. Unfortunately, they've been particularly unhelpful ... they said they offer no parts for resale, I asked about replacement motherboards for sale. They said, no they don't offer!
So final ask - Would they be willing to send me a circuit diagram/ schematics.
They said they don't know what that is and they don't do that anyway.
I know they are not obligated to help me as it was through a third party seller but it's such a shame they don't offer anything other than 1 sentence emails to questions. I'd love to repair it! Inverters are within my skills and I'm well aware of the high voltages that are in them etc...
Anyway cover is off, all capacitors have had more than enough time to discharge (and will be checked). Annoyingly there is no visible signs of damage from Mosfets or Capacitors. No scorching or any burns whatever (visually inside - I enclose picture). I'm pretty sure the issue is on the DC side as it had AC power and was showing a fault 9 (overload but nothing was running at that time and had no load). The system was running mostly in off-grid mode (except for 4 hours at night).
The pop/bang was loud, I was expecting to see a capacitor had launched it's soul to outer space but nothing is out of place in first level inspection.
Anyone have any experience with fixing these... it's basically free and such a shame to junk it - even if it was crappy and only lasted 30 days.
I'm going to start measuring the 35v capacitors on DC and seeing if they register the right microfarad as that's an easy win. The Mosfets will be next ...
Anyone have any obvious clues as to what might have gone bang (it was more of a loud POP) after some clicking of relays.
Thanks for any help - not sure I can recommend PowMr unfortunately if this is how the quality of the product is and especially how PowMr support people, who offer zero support! I'm lucky I got a full refund.