I have a RV with a Victron Multiplus 12/3000 inverter and 544ah of lithium battery. I can start and run the air conditioning.
With the soft start (Micro Aire Bluetooth) it takes 15.3amps of 120v power to start. Down from 27.4amps without the softstart. So they are needed.
Like I said I can only run the air conditioning for about an hour, before I need to decide to shut if off or start the generator. Otherwise I may not make it through the night.
One other item you may want to consider…
I added a Victron Smart battery protect (BP65), on the line going to my rig’s fuse box.
This is so if the battery gets low it will shut off all the lights,etc in the rig. It is much easier if the battery never goes into critical mode to get it recharged. It also acts as an easy on/off switch when I need to reset my furnace.
Yes, my converter has multiple modes.
PD4500 - The full rated load is available for load, battery
charging or both. When functioning as a regulated battery
charger the converter has a nominal voltage output of 13.6
VDC. The system is designed to sense voltage on the battery
and automatically selects one of three operating modes
(normal, boost and storage) to provide the correct charge level
to the batteries.
BOOST MODE: If the converter senses that the battery
voltage has dropped below a preset level the output voltage is
increased to approximately 14.4 VDC to rapidly recharge the
battery.
NORMAL MODE: Output voltage set at approximately 13.6
VDC.
STORAGE MODE: When there has been no significant
battery usage for 30 hours the output voltage is reduced to
13.2 VDC for minimal water usage. When in storage mode,
the output voltage will periodically increase to 14.4 VDC to
help prevent sulfation of the battery plates.
I will look into that BP65, good thing to think of. I also have a generator if i need it, just sometimes harvest host wont let you run one after certain hours, which is why i figured i could make it so i can run A/C in the evening in bedroom off inverter. Should be no sun load and should not need to run much to cool just one small room with door closed.
Thanks for the input.