Hi,
I have a question regarding inverter (Quattro) sizing. If I know that the 10kVA version would suit my needs but the peak power required would be close to its maximum (I would say at around 85-90%), would it make sense to get the 15kVA version? Would it increase the unit useful life?
the big thing to consider is the operating Temperature when at peak power , as long as you can keep the area cool and or lots of airflow then you would be fine.
also when you say peak power being close to max and if this was ALL the time there then I may go for the 15Kw unit just to allow for motor start currents etc etc.
The main thing in my opinion that affects inverter life is overtemp heat and DC ripple,
Nice answer. Asked myself what is DC Ripple...
https://www.victronenergy.com/live/_media/ve.bus:4._ripple_in_a_ac_battery_system.pdf
Here's the answer I found from Victron.
There's probably an increase in useful life, but I wouldn't expect it to be anything dramatic. You also have a higher quiescent power draw for the 15kVA unit relative to the 10.
As Paul suggested, look at temperature management, and whether your peak power requirement is truly the peak power when looking at start up loads. I would also add to the list the likelihood of needing more power in the (near) future without needing to upgrade the Victron unit.
