I'm looking to buy a multi head system cause i need to cut a tall hedge and want to trim some parts around my property.
So far I have been looking at Stihl, Milwaukee and EGO.
What I don't get is how to compare the different units. stihl states that the kma 120r for example has 0,8 kW, the top of the line stihl that just has been released has 1,5 kW. EGO says there basic model has an output of 2000w some sites even list them at 2300. How on earth is the residential ego unit over twice as powerful as the Stihl one?

>>2921222 (OP)
It's just dickmeasuring. If you know how to use and maintain your tools, you barely need any power, it only matters if you don't lubricate (increasing friction losses) or try to cut thick branches that'll bind the chain / blade. I think my trimmer, which I've used on everything from grass to thumb-sized blackberry vines, has something like 0,25kW.

From personal experience, I'd recommend not getting a battery system though. My grandmother bought a high-end one from Stihl a few years back, and it absolutely sucked to work with. Way too light to handle comfortable, badly balanced and constantly out of power. Combustion engines are the way to go if you need power tools. Scythes are even nicer though, as long as you can maintain them properly.

>>2921222 (OP)
They can bullshit with the number they measure all they want. Generally speaking, you can compare battery size to assume what range they work in, because all similar batteries will give you roughly similar peak power output. A (good quality) 18V 5Ah battery will roughly deliver about 600-800W peak power, a 40V 5Ah twice that, so about 1500W. If the EGO has a 40V 10Ah battery then it might well be able to deliver 2500W, or alternatively with a 60V 5Ah.
This is peak power, so if you're, say, cutting tall grass, it's not going to last long on high load. But a hedge trimmer works forever on an 18V 5Ah battery, you don't need a stupid overpriced 60V multitool for hedge trimming.

you can /diy/ it however you want

>>2921222 (OP)
What exactly is your use-case? And what specific tools are you looking at?

>>2921242
>It's just dickmeasuring
Agree
>Combustion engines are the way to go
Tend to disagree unless you're using the tools AT LEAST every week. Gas just requires more maintenance than battery powered.

>>2921358
I have a tall hawthorn hedge that borders a road with a ditch inbetween so i don't want to fuck around with a ladder. I also have some areas like that ditch i want to trim once in a while. Dont want to use a normaler trimmer because of the plastic line so I want to buy from a brand that offers rotary scissors too, so i ended up with the 3 i mentioned in the op. I'm mainly looking at the Stihl KMA 80/120 R, ego ph1420 and phx 1600 and the new milwaukee powerhead. Can't make up my mind cause they all offer some cool things and all have some drawbacks and I find it hard to compare them.

Whose batteries do you already have

>>2921530
dewalt but only small ones and their mowers suck or so i heard and they don't have rotary scissors .

I love my milwaukee tools, and originally wanted the pole saw/weed eater combo, but it was just too cost-prohibitive at the time. I ended up getting a ryobi pole saw, so now I have batteries for both ryobi and milwaukee. If there's a tool that I know I'll use a good bit, like a drill, I go for milwaukee. If it's something I'll rarely use, I go with ryobi. Having said that, the ryobi tools have always performed well beyond my expectations. At the end of the day, you really can't go wrong with any of your choices. Maybe consider which brands have other tools you'll need in the future.

>>2921553
You got the right mindset, it's really not a bad idea to have 2-3 brands for different situations or uses.

>>2921553
I love my milwaukee stuff but they are really price gouging/milking it at this point with how much higher their prices are than everyone else's battery tools.

>>2921530
>>2921536
better question, what store is nearby/do you regularly shop at? thats more of a determining factor of what brand ecosystem to get sucked into.

I baulked at the cost, an electric motor is really easy to maintain and a handy tool, but in dollar terms isn't worth as much as a petrol engine.

There's a difference between the battery capacity and the power of the motors. I find that electric motors lack torque, so while it might have multiple heads, some won't be as useful as others.