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Powmr Efficiency numbers?

ThaiTaffy

Jack of all Trades
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Hi all new member here just a quick question, am I misunderstanding the efficiency numbers quoted by Powmr?

So a little background, I have a home assistant system fitted to the house automating power draw to make full use of any power produced as the battery isn't really used for storage just as a backup for power outages (frequent here in rural Asia).

As I've been adding more features and better monitoring I'm noticing the efficiency of the inverter is rarely above 85% not the 95% quoted by Powmr, am I misunderstanding this efficiency rating they are quoting?

I'm looking at fitting a larger system in the future and I'm wondering if Powmr are going to be my choice for that system also (not many quality options here).
 
Maybe I should add the inverter has a max input of around 800w from the two panels fitted that's likely the reason for the efficiency numbers thinking about it and my question is probably null and void but I'll still put it out there.
 
Hi all new member here just a quick question, am I misunderstanding the efficiency numbers quoted by Powmr?

So a little background, I have a home assistant system fitted to the house automating power draw to make full use of any power produced as the battery isn't really used for storage just as a backup for power outages (frequent here in rural Asia).

As I've been adding more features and better monitoring I'm noticing the efficiency of the inverter is rarely above 85% not the 95% quoted by Powmr, am I misunderstanding this efficiency rating they are quoting?

I'm looking at fitting a larger system in the future and I'm wondering if Powmr are going to be my choice for that system also (not many quality options here).

Peak efficiency is typically around 30% of rated. Below 30%, especially at very low powers, efficiency is horrible.

Above 30% it's a slow taper to something notably less than peak at max rated output.

Additionally, the "95%" number is the efficiency from the DC terminals to the AC output. There are other losses due to wiring

Maybe I should add the inverter has a max input of around 800w from the two panels fitted that's likely the reason for the efficiency numbers thinking about it and my question is probably null and void but I'll still put it out there.

Well, now I see that you're not talking about an inverter. You're talking about the MPPT function of an AiO, so I'll just say goodnight.
 
It is hard to get above 85% and those specifications are intended to confuse.
 
thanks for the speedy replies guys.
so it hovering between 80-85% is standard, it was a new data set i added myself out of curiosity as the inverter had nothing about it other than the quoted 95% on their website,cheers for setting my mind at ease.
 
Just to put an end to this thread and quell any disinformation, the numbers were all booked by my poor understanding.

The AIO efficiency is 100% minus 20w for actually running the inverter (not solar efficiency), within the code I'd written for efficiency I'd forgotten to take into account AC charging so my numbers were incorrect.
 

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