In the next week or two I am going to start the process for building a battery backup for mine and my wife's Cpap systems. This is for off grid and when power goes out.
They both draw about 150 watts a night and will run from 12v. That should go down once I move to 12v. In addition when I am off grid it will charge cell phones, and maybe run some low wattage dc lights.
I would like to be able to charge from solar, shore power or alternator if necessary
the batteries I'm looking at are 4 Costlight 150ah cells
solar panels I am going to get at SanTan Solar are 250 or 300w. I believe I need to run them in parallel so MC4's for that
BMS - unknown
Charge - controller unknown
Cabling - 10g minimum
Fuse block - unknown
Battery box - I have a plastic ammo can type that should fit everything
Inverter - I'm not looking at running any AC loads off this at this time, however I may put an inverter aside as a failsafe in case the 12v cord to my cpap dies I cant still power it, since its peak draw is 285W I figure a 500 w should work for that.
Have I missed anything that's needed?
If anyone has recommendations for specific components that are good quality and cost effective it is highly appreciated. I am not looking at spending a fortune but would like to get the most bang for the buck.
Any ideas are welcome even if it means going a different route than what I'm looking at.
Thank you in advance,
Bob
They both draw about 150 watts a night and will run from 12v. That should go down once I move to 12v. In addition when I am off grid it will charge cell phones, and maybe run some low wattage dc lights.
I would like to be able to charge from solar, shore power or alternator if necessary
the batteries I'm looking at are 4 Costlight 150ah cells
solar panels I am going to get at SanTan Solar are 250 or 300w. I believe I need to run them in parallel so MC4's for that
BMS - unknown
Charge - controller unknown
Cabling - 10g minimum
Fuse block - unknown
Battery box - I have a plastic ammo can type that should fit everything
Inverter - I'm not looking at running any AC loads off this at this time, however I may put an inverter aside as a failsafe in case the 12v cord to my cpap dies I cant still power it, since its peak draw is 285W I figure a 500 w should work for that.
Have I missed anything that's needed?
If anyone has recommendations for specific components that are good quality and cost effective it is highly appreciated. I am not looking at spending a fortune but would like to get the most bang for the buck.
Any ideas are welcome even if it means going a different route than what I'm looking at.
Thank you in advance,
Bob