(09-19-2016, 08:55 AM)Sleeprider Wrote: I'd also check that steering bearing for lube and torque. Bike project looks pretty good, so it's hard to believe you're having problems putting a 12 volt CPAP on 12 volt battery power.
With regard to your original question on using an inverter, you realize that is extraordinarily inefficient to go from DC to AC then DC. All you need to use a 12 volt source is a DC adapter. Your Respironics unit will run without any converter, inverter or adapter on a 12 volt source. Even if you buy a Respironics DC adapter, your cost will be under $30 USD and you can source it from any CPAP supplier, or even Ebay. At that point, you can use any 12-volt deep cycle battery. The ones that are mid-sized AGM for operating mobility scooters are ideal since they are smaller, and more compact and have plenty of power to operate the device one or more nights.
Steering head and leading link suspension/forks all good, I'm surprised I didn't bend them considering I hit the fallen tree at 60 kp/h. [see my other post elsewhere in the forum for more details and photos. http://www.apneaboard.com/forums/Thread-...my-sidecar
I know inverters are less efficient for running things that can be run direct from a 12v battery, I have another inverter I use for other small 240v items that won't run direct off a battery.
I just thought I might try it out for a night at home on the inverter outlet while I wait for a 12v cord to arrive, but I don't really want to risk destroying a new Dreamstation I've just paid $2,300 for because the inverter might have a sine wave that is detrimental to it.
I spotted the jump starter/power pack the other day when I was looking for other parts I needed from an auto accessory shop, the pack looked like a good option because of the extra features it has - compressor/jump start/work light/2 x 12v sockets/2 x USB sockets/240v 400W inverter power outlet - all very handy as a single unit for camping with both the 4WD and the sidecar, a little big to take on my two wheeled motorcycle camping trips though.
It is somewhat disappointing to find that the claimed 18 A/h battery is actually only a 12 A/h one.... duped yet again by foreign manufacturers who have no integrity when it comes to truth of advertising.
And a 12v power cord for the Dreamstation here in Australia is $49.95 AU + delivery.
I prefer to buy off local suppliers, and don't trust FleaBay to get products to me.
The last items I ordered where guaranteed delivery to anywhere Australia in 14 days or less, they were to be a gift that my wife was to take overseas with her for her father's birthday.
They were ordered and paid for 5 weeks prior to her flight out, the goods arrived two weeks after she had flown out.
And the eBay vendor claimed the items were in Australia to start with, but they ended up arriving in a package from England, and marked Made in China.
I like your idea of the mobility scooter battery option, I will chat with my battery man that I buy all my bike/4WD batteries from... he has a big range, and supplied the batteries I bought for a powered wheel chair I got for a mate who has MS, so he will have the type you are referring to as well.
I'm still going to build myself a powerpack compact enough to carry on my adventure bike for camping trips.
I will investigate the scooter batteries for that- it will be exclusively for the CPAP, so only needs a socket for power out, but I will also make a male to male lead to plug in to the socket so I can recharge it off the 12v outlet on my bike while I'm riding.