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@BB, look again at the other criteria you gave for What counts as an EAPC. The 15.5mph assistance limit is hard and fast. All the rest (example: "the maximum speed of the bike") explicitly ask for a declaration of nominal value, and each would have a range of 'true' values if taken literally...

"a plate showing the instantaneous voltage of the battery" ;) The acceleration test measures what the bike does (20 m in 6.9 seconds) rather than how it's achieved (250W). Would it have been better for the rules to focus on behaviour generally?

The weight limit for bicycles was removed which would barely make sense in the context of a hard 250W limit. We should all be hitting the 'Report a problem with this page' button. EAPC regs, DfT guidelines

There's the question of heat treatment (IANAM) and the bracket design might be copy protected to stop bolt-on interfaces being sold. Although how you'd protect a triangle of holes is beyond me, and what's to stop someone making an oversized interface for the buyer to fit with standoffs? Perhaps...

A larger sprocket would be cheaper but mean losing that lovely chaincase, hence a smaller chainwheel. But most hub gears have tight limits on the torque they'll tolerate so if the gearing changes by much the Nexus could be shortlived (like mine). I'd size up the road clearance of the centre...

It needn't be, if he backs off to climb a modest hill at the same speed as before the efficiency will stay the same, because when the hill levels out both top speeds will be the same. This may not hold true if the PAS levels don't allow such fine control or if climbing near the motor's gradient...

If you were to ride the 48V version of your bike alongside the 36V version i.e. used the same way they'd have about the same efficiency and you wouldn't lose low speed performance, the controller and motor would act together like a 48 to 36 volt converter. It'll do what the 36V rig does about...

I can't think of a real need for a clamp meter at home and they aren't very accurate, HTH.

I'm seeing 'domain parked with GoDaddy' but downforeveryone tells me it's up. Defo favouritism at play here. You didn't mean a VPN's essential did you?

Conversion to another mid-motor (because of part linking)? Bosch may use just 1 or 2 mounting styles and maybe they're common to multiple brands to keep frame cost down. @Woosh toyed with the idea of producing a BB adapter (outcome?). If a Bafang wouldn't fit I'd switch to a rear hub. The...

Thanks @Chuns for sharing the journey, there's as much to learn in what to do or not do and when as there is in how to do it.

I'm sure Wisper will be along but a third party view may be helpful. Top quality batteries can last a decade but respectable middle range batteries manage about 4 years. It's easy to overlook but the user guide usually says to top up every few months when not in use - nine months is a bit of...

Sorry, typo. Is #3 to keep it dry or to make it look bigger ;)

Good parts individually but it's said that long term an Alfine hub won't stand up to the torque of a BBS02, not many hubs will. It's much discussed on the web and my Nexus Premium 8 died at 4k along with its second Impulse motor in effect costing 5p/mile. Mustn't grumble, the motor cost...

Is #3 to keep it dry or to make it look bigger?

Often-times you still get phone coverage in a lift, just sayin'.

Pedals are personal, bikes are often sold without. From your accessories I'd keep the mudguards and propstand, with my favourite stem, suspension seatpost and the rest transferred across. Hence wanting compatible mounts/inserts all over. Could customers have a tall stem fitted, a battery...

It's certainly a think twice investment but a massive plus not to have to accept an insurer's replacement. @Wisper Thanks for stepping up, I really hope you can reach some arrangement. <Blue sky> If only the brands claiming fire safety would offer to open source their BMS designs "to save...

Does £260 include delivery? The Yosepower.co.uk site isn't listing a 36V20Ah and the .com site says it can't deliver to my address near yours. Website glitch or favouritism? :) Ebay shows 3.5kg for 20Ah vs Yose 5kg for 17.4Ah, and for 20Ah 4.2kg, not wildly different if ebay's wrong and it...

If 'the Swytch' is a folding bike the 17.4Ah is NMC, the one RtJ linked to will be a lot lighter as well as from an established source.