Reviews by our members

• 4

  GIANNIS_LYMPEROPOYLOS

  2025-02-11

  Verified purchase

  This review is about the rated power: 1000 W

  It works just fine... but from 21v and above, not from 19 as it states everywhere in the product description... so if you choose to operate it with a classic 18v tool battery that is close to 21 but in real conditions because the pack is not all 5 cells at 4.2v... it is usually around 20.7 to 20.8... anyway, even if it were 21, it would work for 2 seconds... so the range is 21-30 volts... the tolerance at the upper end might be slightly higher by about 1 volt... so I used a DC-DC step-up converter to 24v and it works just fine.
  I put it in a vacuum cleaner with a nominal power of 600w with the power at maximum measured at 635w with 2 batteries and 2 DC-DC converters in parallel that have the capability of 960w... it works just fine when you start it from low and shuts off only a click before maximum... in between it works perfectly... the starting current of the motor is always slightly higher in these types of motors but not dramatically higher as some claim... for example, a motor with a nominal power of 2000 goes, let's say, 2200-2300 at startup... the lithium battery has a large capacity of 5.2ah and a maximum wattage it can handle of about 1200w... absolutely normal... with two packs of 5 18650 at 1200w at 21v it is around 56 amps which is shared between the two series at about 28 amps per cell something also just fine since the high drain cells used have such a peak... and the battery states it... 1250w!!
  Since it is a modified sine wave and I read that the MOSFETs and the speed control boards do not work well with modified sine wave inverters, I thought it had something to do with the MOSFET transistor varistor thyristor whatever and the board that controls the speed... I removed it but the same... as most of the time this modified pure sine wave is a bit of a fairy tale... from what I understand... the efficiency in the converters I used is quite high... the continuous wattage of the inverter is 1000 and the peak is 2000 easily within range since the vacuum is 600w... anyway, I don't know exactly what's going on... two things to keep in mind:
  1. It works from 21 and not from 19v
  2. Get an inverter that is clearly above the wattage you want by looking at the continuous and measure the wattage of the device you will connect... don't just rely on the nominal wattage... with resistive load, there is no particular issue... with inductive load though... motors because the initial torque is needed but also to maintain the speed under load... choose something significantly higher in specifications....
  And one last thing... on many of these inverters, it says on some sites:
  Note: lithium battery capacity of low voltage, easy to cause high voltage protection, will lead to the inverter has a display but no output voltage, no way to use high-power appliances, it is recommended that the inverter with lead-acid batteries, water batteries will be relatively stable voltage, Cannot use lithium batteries, cannot carry inductive load appliances, can only carry resistive appliances, before you buy!
  I didn't understand the first part because it's a bit of Chinglish... I didn't try it with 2 lead-acid 12v batteries in series which are essentially blind... they allow deep discharge and starting current and do not have protection boards etc... so as to rule out the lithium battery factor... I will try it... maybe something in the inverter shuts down...

  Translated from Greek · Show original
  Did you find this review helpful?YesNo

  Report
• 1

  nik_revolver

  2024-05-14

  Unreliable product. Supposed to provide 1500 watts. "Burned out" on the second day of use with a maximum load of 160 watts.

  Translated from Greek · Show original

  • 
  Did you find this review helpful?YesNo

  Report
• 5

  2 out of 2 members found this review helpful

  Adrianos_Georgopoulos

  2020-12-26

  Verified purchase

  This review is about the nominal input voltage: 12 V

  Ένα μήνα μετά είμαι πολύ ευχαριστημένος. Θά δούμε τη συνέχεια

  Did you find this review helpful?YesNo

  Report