“I am bed ridden and I need to be able to run my bed, keep my phone charged and a small refrigerator... How long should it last?”
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It's hard to guess without the exact items, but this should recharge a smart phone from empty 35 times. There's a bunch of people on youtube who are using these types of devices to keep decent sized 12V cooler shaped travel freezers/refrigerators running for days. I'd guess a small college type fridge is a less efficient than those. But it also depends on how full it is and how much you open and close it. Same thing goes with the bed if you're constantly moving it up and down it's going to use up the stored energy quickly. If it's heated then it'll use it up very quickly. If you want to you can add a bunch of lead acid batteries to give it much larger capacity or add solar panels to offset the drain put on it.
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