Inverter: doubts...doubts...doubts...

[Username25]

Hi all,

I'm in process of choosing inverter and have many doubts which way to go... We have 300W inverter (Mastervolt AC Master) and it worked just fine for small electronics. Plus there are 2 step-up converters 12->19V (laptop, TV, etc.), 12->24V (Wi-Fi antenna, vacuum cleaner, etc.). Our needs are very small; we do not use any power hungry appliances.

Now got Daewoo Mini wall mounted washing machine (3kg), so was thinking of getting just a bit more powerful inverter, 500W would certainly do the job. For cold 29 minute cycle it uses 8A to operate with water and clothes; centrifuge at most 13A and full wash cycle requires 4.5Ah, so even our 300W inverter would be fine. We had no plan to use it in any other mode as hot element pulls approx. 140A for 80°C water heating and 55 minute cycle uses 58Ah, but you never know... Moreover, in some distant future, maybe, getting rid of gas and converting to induction cook top… haunting idea. Our current systems is 360Ah lithium battery (12V) and 230W of solar, so probably a bit too small for using induction cook top…

So first, it was 1500W inverter on the buy list, then 2000W and it ended up with 2500W (something like no more upgrades for life), then back to minimalism and finally ‘f**** I don't know’… So any thoughts, ideas, suggestions are very much welcome.

On a technical side…
-> AC Master 12/1500 (230 V)
Efficiency 93% / No-load power consumption: (ON mode) <1.8A / (energy saving mode) <0.1A
https://www.mastervolt.com/products/...-12-1500-230-v

-> AC Master 12/2500 (230 V)
Efficiency 88% / No-load power consumption: (ON mode) <3.6A / (energy saving mode) <1.1A +++ hard wired, integrated AC transfer system
https://www.mastervolt.com/products/...-12-2500-230-v