tim tarras
WKR
I have a traveling CPAP with a renogy 360 battery back Like this. I can get 3-4 nights and charge my phone off of it. It will go longer if you recharge it with a solar panel.
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Got a link?1000wh+ power stations are running $220 or so right now. Be sure and get the 12v adapter for your machine ($40). The hose insulator is nice if it's going to be super cold.
That power station should last you 5-6 nights easily.
There are ecoworthy 150ah lifep04 batteries on sale for $220 right now. That's 1800wh. You could probably push that battery up to 10-14 days without a recharge.