This. Goal should be to always have a second charger within reach when you stop at one and find it out of service, especially with those single-point-of-failure chargers.
God I need to proofread when I rewrite half a sentence.
Elevation is desperately important on the Hume Highway when you consider where to site chargers. You're going uphill pretty much all the way from Pheasants Nest to Berrima. To say the Bargo Ramp is deceptively steep is an understatement.
Headed north last Friday night I was unusually low on juice by the time I reached Goulburn. The Chargefox rapid was pitifully slow, the ultra-rapids were both offline (the UPS failed a week or two ago), I hate doubling back to the supercharger, I wasn't quite ready for dinner yet, so I thought I'd grab dinner at the Mittagong RSL bistro again. So I charged up to 40% at North Goulburn and then pressed onto Mittagong.
Alas Mittagong was occupied, so I decided to press onto Picton.
Mittagong is almost at the top of the Bargo Ramp, at about 635 metres. Picton is near the bottom of it, at about 165 metres. Coasting down the range is easy, especially if you take the Bargo exit and chug along at 50-80km/h along the old road. I left Goulburn at 40%, Mittagong at 11%, and Picton at 5%.
The big risk with Picton is once you're there, that's it. There's only one DC charger, and there's no AC charging anywhere near there either. Macarthur Square has three-phase AC, and I think it's at about 50 metres elevation. But there's a climb either over Razorback, or up to Wilton to join the freeway. All you can do is check PlugShare and hope someone checked in & reported a successful charge recently.
Which is why I think Pheasant's Nest and Marulan/Goulburn are particularly good spots. Goulburn gives you enough range to comfortably get across half the state, but you need a solid charge to get up the range and into Goulburn. Picton is too far off the beaten track for your typical motorist. Mittagong is almost past the worst of it. And there's nothing between either Zetland, Homebush Bay or Seven Hills, so without Pheasant's Nest (or maybe Crossroads), you have to leave Sydney with enough charge to surmount the range. Under normal circumstances that's fine, but what if you aren't from Sydney and you're trying to get home to the country?