CPAP battery solar charging question

Mr Biggles wrote:
Sun power makes a portable 40W solar kit that claims to charge the battery in 4-5 hours.

Before you talk to a salesman, go armed with these facts:

A 40w panel will produce maybe 32w on a good day. That will put about 2.5a into the battery at peak production. In 5 hours that would be 12.5amp-hours. That means your 100ah battery could only be discharged 12% for that claim to be true.

You can't go by these mfr claims, or product reviews, or testimonials.

We are going off grid for the first time. I don’t really want to run the truck to to charge the battery. Sun power makes a portable 40W solar kit that claims to charge the battery in 4-5 hours. So solar charging is possible.

There’s a solar supply store in town. Maybe I’ll pay them a visit.

assuming the OP has insurance, I got a passover humidifier "ready made" think it is a respironics but that really doesn't matter.
bumpy

2oldman wrote:
I did a bit of reading about this battery and it appears it has to be charged from its own 120v charger. If that's the case, you may find it difficult to connect the output of a solar controller to it.

It may require you to have an inverter/batteries already on board. 100w is just barely enough.

You can purchase an optional 12 V car charger for the Pilot 12, so it can be charged with the trailer battery.

I did a bit of reading about this battery and it appears it has to be charged from its own 120v charger. If that's the case, you may find it difficult to connect the output of a solar controller to it.

It may require you to have an inverter/batteries already on board. 100w is just barely enough.

Mr Biggles wrote:
I won’t be using the humidifier. I found a 100W solar kit. Thank you for your reply.

No problem. You can make a nice passover humidifier from a Tupperware container and some old air delivery hose ends, glued to the lid (at opposite ends). I need humidification always and a passive humidifier was the only way to go.

Used to be CPAP supply places sold passive units but they don't anymore, for what reason, I haven't a clue.

I won’t be using the humidifier. I found a 100W solar kit. Thank you for your reply.

Don't use your humidifier, that will suck the pack dry in jig time. I use a pass over humidifier I made from a Tupperware container. I recharge my pack(s) with my Zamp 150 watt solar. Don't think 55 watt is enough.

I run a pair of Li-Iron packs. I can get 3 days from 2, no problem,