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Yeah that is an option, tough expensive.

I figured it would require so complex electronics it would be worth just buying a bigger battery.

I will not draw more than 40 amps from the battery as that is dumb, but I still want my 50A during acceleration. I have an idea. What if I connect a super capacitor bank in parallel with the lithium battery? The Amperage will be shared between the two allowing well beyond 50A total being drawn...

I don't, that is just what others have said and what I have read on other sites. So the BMS will shut the power supply of if current goes over 40A? I will not draw that much then. But if the cells are rated at 8A each, wouldn't it be safe to draw that much? I feel like the limit would be lower...

That is what I plan on having

From what I have read, the BMS rating is max for constant discharge, peaks of a couple of seconds higher will not get it to shut of. It says "Maximum constant discharge current: 40A" on the product page. I won't draw more than 40A, but I may want to draw just 40 or slightly below it. I didn't...

Wouldn't 35-40A peak work? Again, continually I won't use more than 25A.

Thanks for your input. I won't be using more than 20 or maybe 25A when cruising (slow) or accelerating slowly, it will just be when doing a hard acceleration I will be exceeding 35A, but I get that it wouldn't be a good idea to try drawing more than 40A. Though, would allowing bursts of 40A be...

I checked my SLA batteries again and they were apparently 14Ah. I found a chart listing max current draw for SLA under 7 and 30 minutes. 42A is not too bad keeping in mind that's what my lithium cells will safely output. I may look in to that shunt mod, or just opt with the ammeter and maybe...

I think I'm going to get a rack on which I will mount my bigger controller and get rid of the hanging bag. Will make the wiring a bit neater too then, maybe add a switch for the speed limiting wire.

That is what I though may be the case. If I make sure to not constantly draw that much and only do on occasion then? I think I'm going to buy an ammeter and voltmeter to constantly monitor these things. While cruising at 20 to maybe 30 mph (30-50kmh) it surely won't draw more than 25-30A on the...

I recently built an ebike from one of those cheap kits on amazon, and it is really fun, though quickly felt lacking in both speed and acceleration. Apart from the controller already connected I have got another one rated for 48 to 72V and 50A, though the capacitors inside it were 100V ones. My...