Can a 12V 7Ah UPS Inverter ( 220v ) run with a 14.8V 150Ah Battery ?

hi guys this what you see is a 12V to 220V computer UPS inverter at the back you can see three sockets and the capacity is upto 600 VA the two thick wires that you see are to feed the D.C input 12V 7 Ampere to this LUMINOUS Duo inverter let's open it up to confirm if this UPS is working fine and also identify the polarity of the 12V D.C input cables because they look alike and it's difficult to differentiate which one is positive and negative although if you look closely you will find one of the terminal is covered with black tap indicating negative terminal and the other one will autumatically become positive now let's test this UPS with this 12V 5 Amperes D.C supply to further confirm that it's working the non insulated terminal is always negative and the other one automatically becomes positive after connecting it carefully to the terminals of the UPS you should hear a beeping sound and then turn the UPS ON the light will glow and for the final check you will have to test the socket output voltage which here as you can see is 170V A.C finaly indicating that the inverter is perfectly fine let's covered the positive terminal with red tape to avoid any future mistakes and place everything back as it was before as you saw guys the D.C input terminals are very small so to make it easier to connect it to the battery we will have to extend the D.C input cables here i am using the blue one as positive and black as negative for extension cables i would recommend that you use atleast 8mm to 10mm wires although here i am using only 4mm cables because i don't have those and this UPS is going to draw huge current depending on the load that is connected now comes the clips that i needed to be connected to the extension cables the clips are to be as big as possible so that they can with stand huge current without getting heated up and it's highly recommended that they are of copper although i am sticking to the old iron once because i don't have those this is a 12V 150 AH discarded inverter battery it has been used for five years continious charge and discharge but when i ckecked it's voltage it still has some juice present you can see that it is indicating 12.25V let's test this UPS with this battery the beep indicates that the connection has been established let's turn it ON the amperes taken by my workshop lights are somewhere around 1.25 Ampere so that is what i am going to need from this UPS to run it under light out condition which i think should be easy for this to handle this is the main supply plug to turn my workshop lights ON all of them so when i am going to disconnected as you saw that they turn OFF now let's connect this plug to the socket output of the UPS and check if it can handle all of my lab lights socket has been placed let's turn it ON let's press the switch as you saw that the lights glew for a second and then it's started indicating low battery because the terminal is all corroded so i think that the connection between the clips and the terminals is not established correctly so after properly placing it again i am giving it a second try and now you can see that it's lighting up perfectly with the hope that it continues to work for longer period of time because obviously i will have to work for 5 or 6 hours although i also have to talk about the charging of the battery which i have covered later in the video this is an induction fan 25 watts those are four 50 watt halogens that's the working area and those are four 20 watts LED tubelights including one 35 watts focus LED now let's do the battery Ampere measurement the Amperes drawn are as high as 32 Ampere which is quite high for the 4mm wire cables and that is exactly why i recommended thicker cables upto 8mm or 10mm there is one more thing that you need to make sure which is keeping the batteries on some wooden or plastic platform which will further reduce self discharging of the battery now comes the part of charging the battery for which i am going to use this 15V 3 Ampere laptop charger it already has clips attached with positive and negative although the output voltage is still a little high which is 15V and the required voltage is somewhere arourn 14 to 14.5V for battery charging so we will have to reduce the output voltage with the help of a 6 Ampere Diode the black colored side terminal is the positive one which is to be connected to the negative terminal of the battery with the negative terminal of the D.C input terminals of the UPS and to the negative terminal of the diode that i am bending at present We have to connect the negative from the charger this will also prevent reverse discharging the positive will be directly connected to the positive terminal of the battery now guys I have already switched on the charger and thus the charging has already started so it's time to measure the current that is being fed to the battery with the help of the charger which as you can see is around 4 Ampere that is quite good and also I have added these thick 4mm blue cables which are coming out from my bicycle generator that I made a few months back so now I am going to exercise and that energy is again going to get stored in my inverter battery you can see that at present i am feeding somewhere around 50 watt and i did a maximum of 160 watt the Result of which can be seen here as the increase in voltage from 12.25 to 12.48 v D.C ok so guys now comes the hidden question for today why is it that only the positive terminal of the battery gets corroded do check out my previous water pump video it's link is provided in the description it works great and is made from simple discarded stuff the operating voltage is only 12 volts and the output pressure is super did you know that the first water pump was invented by a Russian engineer

Channel: Mr Electron

Views: 903,330

Rating: 4.5317678 out of 5

Keywords: mr electron, mr. electron, 12v, 220v, inverter, 12v to 220v, ups inverter, ups, computer ups, 7ah, 150ah, 14.8v, battery, 12V 7Ah UPS Inverter

Id: eAA6J-_gCWM

Length: 7min 50sec (470 seconds)

Published: Wed Jun 03 2020