caymaanedge
New Member
- Joined
- Jul 19, 2020
- Messages
- 124
I’ve read a lot about this running AC in battery/solar, but it seems the calculation details are lacking on the large systems.
So here’s what I’m chasing.
(1) 13,500BTU AC consuming 15amps at start-up and 13 amps when running. Soft start is installed.
My fridge consumes about 2 amps while running.
Let’s say light and other stuff average 2 Amps as well.
So approx. 20amps @ 120v
What are you using for runtime calculations for the AC and Fridge? 100% or say 70%?
At 100% that’s about 5,280 amps @ 12v
How do you size the battery bank and solar? That’s a 220ah average over a day, but no solar in the dark so carrying between sun would be like 12hrs @ 220ah = 2640ah. The big systems I have seen are running 1000-1200ah of LifePO4 which is less than half that.
What am I missing?
For reference I have 1140 watts of solar and 680ah of LifePO4 batteries. Trying to understand what it would take to run one of the AC’s as well.
Thanks
So here’s what I’m chasing.
(1) 13,500BTU AC consuming 15amps at start-up and 13 amps when running. Soft start is installed.
My fridge consumes about 2 amps while running.
Let’s say light and other stuff average 2 Amps as well.
So approx. 20amps @ 120v
What are you using for runtime calculations for the AC and Fridge? 100% or say 70%?
At 100% that’s about 5,280 amps @ 12v
How do you size the battery bank and solar? That’s a 220ah average over a day, but no solar in the dark so carrying between sun would be like 12hrs @ 220ah = 2640ah. The big systems I have seen are running 1000-1200ah of LifePO4 which is less than half that.
What am I missing?
For reference I have 1140 watts of solar and 680ah of LifePO4 batteries. Trying to understand what it would take to run one of the AC’s as well.
Thanks