3000 watt inverter recommendations

[tranby]

I have been researching various inverters the main use would be a microwave / grill which is
800w and 1100 watts so wanted to build in some extra capacity. I have looked on Amazon
and ebay and whilst most are around £250 for a pure sine wave, I also spotted some on
ebay for around half that so wondered if anyone has tried one or has any recommendations ?

Cheers

 

[Revolvor]

What is your leisure battery type and capacity?

 

[tranby]

What is your leisure battery type and capacity?

It is a 140ah AGM ;-) we would only be using the microwave to reheat and for fairly short periods - possibly 10 to 12 minutes at a time

 

[Jev88]

Sunshine Solar.
Not sure your single battery will last long though

 

[BryanW]

Sunshine solar and they have a price reduction at the moment.
I think a bigger battery bank is needed. I run a 3000w inverter from 320ah lithium

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[MisterB]

Renogy 3000w inverter has been brilliant for me, the auto pass through really makes the difference. Have a look on you tube for an explanation if how it works. I do have a 304Ah Fogstar battery though .... Sometimes it's about how much current you can take from your battery at any one time as opposed to the how much power it provides over a period of time.

 

[peterc10]

A lot of fake "sine wave" inverters on Ebay. We bought our Renogy 2000W inverter from Amazon and are happy with it.

The 800W quoted on a microwave will be the output power. The input power needed will be 1250 - 1300W. So that will be drawing 100+ amps from your battery. That is a lot to ask from one 140Ah AGM battery, and is a much higher rate than is recommended for such a battery. It will not last very long if you use it frequently. For those sorts of draw you really need LiFePo4 batteries, which can tolerate much higher discharge rates without causing loss of battery life.

 

[Emmit]

It is a 140ah AGM ;-) we would only be using the microwave to reheat and for fairly short periods - possibly 10 to 12 minutes at a time

Hope I've got this right.

For your info;

140Ah battery = effectively 70Ah capacity before the potential to damage it.

2000w Inverter uses 166 Amps per hour. ie 2000w Divided by 12V

In, say 12mins use, you would use 166amps divided by 5, (12mins part of an hour) = 31amps.

That's nearly half your batteries effective capacity with no guarantee that solar
could top it up.