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Reviews (2)
Sep 20, 2019
Large capacity 12 volt inverters need lots of current from large batteries
1 of 1 found this helpful UPDATE
I bought one of these March 2021 to replace my 7 year old one, which still worked
The newer design with toroidal transformer is much more efficient and puts out less heat
The output is stable for Voltage and frequency. It has more features including Lithium Ion charging profiles. Also it's a 75 amp battery (genset fed) charger this model and not 40 amp as i saw listed
The sine wave output is quite good. Just a slight flat top on the shape and added distortion. Good enough for the price point of this inverter SEE 2 PHOTOS ATTACHED
The first image is my 350 watt baseload. The 2nd is with the microwave added (1400 watts) at 1750 watts total load.I don't run much more than 2000 watts mostly.
(Not to scale as i used a voltage divider with resistors to bring the volts down to measure on the small handheld scope)
I run 1080 amp @ 12 volts ( 6 x 2 volts) @ C5 forklift batteries.
Very happy with this item. Time will tell it's reliability
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I have had this style of inverter (not this model) in service full time 100% off grid for 6 years now
They are very reliable
However to run this 12 volt model reliably at even 2kw of the 3kw (9kw peak) capacity you will need 90mm2 diameter battery to inverter leads of no more than 1meter long
Or go for the 24 volt model which will halve the current.
I would also recommend 12 volt x 1000AH batteries or larger such as the forklift type (6 x 2v batteries of 1000ah or larger)
If running less power than this, say no more than 1kw then you can use smaller batteries.
But i would never go below 600ah batteries if using 24/7 as the inverter run current through the night will be 7 amps x 8 = 56 amp hours right there.
Unless every appliance including your fridge is off you can't use the lower standby current mode. Any current draw and the inverter has to turn on and provide the load plus 7 amps on top of that as inverter losses.
These are a great reliable and low cost inverter. Albeit a bit power hungry. But larger batteries are a fraction of the cost of a more expensive inverter
May 19, 2024
All Good
All Good