UPS to 1.5kW Sinewave Inverter Conversion part2 - How the Inverter Works

[@nickush7512]

Dude.... a blinder of a series that you are putting out here... Good on you....

[@SquirrelFromGradLife]

Thanks for the lecture, for once it's nice to see someone that actually knows what they're doing

[@kf7tkj]

I really enjoy these videos, cant wait for the rest! I also have a few of these UPS's and have wanted to do this very thing.

[@blackIce504]

Hey bro i know its a 2 year old vid but just for some info that 3 pin cap near the H-Bridge is only used when charging the batts not when the inverter is running it would just sit there. So if you wanted to put more batts or higher capacity batts then add another cap and some fets, Other then that keep it up.

[@peterxyz3541]

Thanks for saving me $$$$$$$$$$. I was looking for a Pure Sine Wave inverter; but, I didn't connect the reality that these high end UPSs are Sine Wave inverters.

[@guyinthebiggreentruck]

Love your vids. watched a ton of them. with all the inverters that you repair and or convert, do you resell them and if so where do i get access to the ones you sell.

[@gwhuntificator]

please make condensed conversion only video. Since you asked us to comment for it in description.

[@williamstaten8102]

I got a motomaster 1750 inverter. I liked your review of it but I'm having problems. It will power stereo, saws, chargers, but Florissant tube light with six bulbs will not start. CFL bulbs, it will start up two at a time but three or more it goes into fault mode and shuts down. I have a building that's only powered with solar. I currently have a 750w black and decker that will run all of the above, this one will not. A little more about the CFL's. I have a room with 6 bulbs on a switch. I can get all of the bulbs lit up if I turn in one at a time.

[@knurlgnar24]

That's unfortunate. It sounds as if this inverter is not able to power the instantaneous surge of all of those fluorescent lights powering up at the same time. The power factor of that surge is very low and some inverters have trouble with it. You could try opening it up and adding additional high voltage capacitance, but otherwise you may need a different inverter unfortunately.

[@tubelife70]

+knurlgnar24 Sorry for interjecting but I would like to help. I don't really know much about all the electrical dynamics involved here but the thought occurred to me the maybe a high voltage capacitor such as those used on 120V AC furnace motor could help to kick start the load of fluorescent ballasts. Let me know your thoughts on the subject or am completely out in left field.. I enjoyed this series of videos... Thanks.

[@staxmotown6183]

@@knurlgnar24 my smart UPS takes fluo lights if they have internally capacitor for correction of cosphi .. no problem

[@royallan3717]

Hi, I bought a couple of 12v to 240 volt inverters in a faulty state to repair.I have a brand new 12vdc battery and when I connected to inverters they display 17.5 volts on the unit’s screen. Is there a component I should look at? Appreciate your videos and help

[@knurlgnar24]

I haven't run into that particular issue, but I suspect the display is simply reading the voltage incorrectly and is unrelated to the inverter root fault. I'd inspect it for obvious visual damage first, then ohm out the power FETs and diodes as a start.

[@royallan3717]

@@knurlgnar24 thanks for replying so fast,I have just opened all 4 and only one has visual…a fuse blown and has been replaced already.I’ll have to study up on testing the rest you mentioned. Small steps

[@royallan3717]

@@knurlgnar24 just some feedback,I hooked up one to a power supply adjustable. 13 volts and it works fine. So it seems a cut out low voltage is the problem

[@luistoribio6031]

las uniones de base y emisor para general corriente alterna.

[@fsrtlove663]

hi i have some UPS Back-ups pro 1000 but open it and the cable contact with the body please can you help me to fix it

[@batistafrose6009]

Nice video

[@McCuneWindandSolar]

The APC's I have they are 1500 watts I can turn them on with out batteries in them. but it just gives me the replace battery led if I do. and I can also use them as stand a lone inverter's I took the speaker out lol.

[@oHexMastero]

I have a 48V unit similar to this. I saw how you tested the case ground + the fins to see if it was trying to charge the battery. On my 48V unit, there are two inner fins which show around 50V and the two outer fins show around 25. Is this normal or is my charging circuit bad?

[@dashtesla6431]

Check the voltage at the battery bank terminals, could be a bad connection, corrosion among many other things including a few that would be normal but doesn't make sense

[@kennysponker]

Hello, thanks for these videos. Watched every single one. I am attempting a 3KVA APC UPS conversion to an inverter but ran into a particular problem. I believe your the guy with the knowledge that could help me. I have a 12v solar array charging a 12v battery bank. However., the battery pack for the UPS is 48v pack. I get huge sparks when I try to connect. Kindly help. Kenny

[@Omegaman1969]

You will need 4 x 12v batteries connected in series to make 48v. You can't connect 12v battery to a 48v battery as the higher voltage battery will try to bring the 12v one to 48v and likely explode.

[@mikekaranja6723]

How are you my friend?? Congratulations for a good job, n let me ask you I have Igbts 3 pieces but each is dual and I want to feed the 600vdc. My question here is was requesting ur help, before I feed this power to my Igbt invator, from AC the voltages in is 250ac, n then I convert it to dc 600 Vdc. I haven't feed scrab capacitors n sunt resistor, now will this 600dc burn my Igbts if that is I will not feed those items bro??

[@FazluRaian]

It should be keep every House better and also at Cine shooting Place, which easy can handle.

[@shelldonbeckfordJahSon]

Hey I have an APC 1200vx from the 80s i want to make a inverter from it can you give me some help?

[@ericvisser1514]

I am interested in using a UPS ( internal batteries removed) hooked up to my solar battery bank, batt voltages are the same. Do I really need to modify the internals to use it semi-continuously I am planning to buy a higher wattage unit than I need, to get over the continuous use issue.

[@knurlgnar24]

You will need to benchmark your UPS unit to determine what is needed. They are usually only designed for short term use so most will require modifications, but some are also designed to allow add-on battery packs. Those may be OK without additional mods.

[@staxmotown6183]

@@knurlgnar24 I am running a smart 3000 rm apc from my 1200AH /48 volts AGMs for providing house electric , they do keep up very well charging a waterboiler of 100 liter with resitor inside taking 1250 watts takes a few hours ( some 3 to 5 KWatts according to temp setting of the boiler and the UPS don't even get warm ! they do a good job for fluorescent tubes if those lights have capacitor for cos phi correction but thye don't accept HQI lights , a 175 watt HQI will start , will burn but the UPS will start beeping for overload so I suppose it cannot get away with the cos phi from the HQI lightning systems .. LED lights is no problem at all , vacumm cleaner of 2000 watts no problem , I still have to test mu heatpump airco hot/ cold unit that should take 1400 watts at full function but not yet tested .. will keep you updated !

[@runaway6842]

Thanks

[@james10739]

On that transformer it looks like that might be a 130 not 180 but I'm not sure

[@ExStaticBass]

First you need a battery management system so that it stops charging when the batteries are full. Overcharging is really bad for lead acid cells. Secondly if you know anything about electronics, you can configure your array in a series parallel setup. So set 4 12v panels in series and connect that bank in parallel with another just like it. This gives you the volts and amps needed to run while charging. Upgrade to more banks of 4 for more running wattage. Send me a message for more info...

[@steffenbuettner4294]

Why would they have linear regulation for charging the batteries, that seems wasteful and pointless...

[@michaelboyd2189]

are this used frome parts old printrrs & tv ??/ can thes be used to make a biger & btter it l ook like you mad it to iin prove it for more power