I am very pleased with my ZEV 6100 electric maxi-scooter. It has been modified by adding a Cycle Analyst computer and halogen headlights. It is a pleasure to ride, and does everything I bought it for and more.
When I was shopping for a e-scooter, I was looking for an e-scooter that would get me around the local towns and occasional short excursions on highways (up to 55mph and range of 30miles). I live right up against the foothills of the Rocky Mountains in Colorado so hill climbing capability was important. I looked at the Zero/Brammo e-motorcyles but didn't want the noise of a chain driven bike, plus I liked the low center of gravity on the e-scooter designs with hub motors. I tested a R-Martin EVD 3000w but it was gutless and couldn't exceed 35mph up small inclines in this area. So I started looking at the XM-5000Li. Then as an odd twist of fate while spending a few weeks on vacation in Kauai, I ended up drinking beers for a few hours with the owner of the X-treme bikes. I picked his brain on what typically fails on his XM-5000li's and how long I would have to wait for a reliable BMS. When I got back to the mainland, I stumbled across the ZEV e-scooters. At first, I thought they were an X-treme distributor as their bikes looked like XM's. But as I read more about ZEV, I found out that they are a US manufacturer that had designed a bike that lookes like the XM's but without the failings.
At first I wanted the ZEV 7100; why not go for overkill. In Colorado we have great tax incentives to do our patriotic duty and ride EVs. The ZEV 7100 would have cost me $4321 after tax credits; a great price! But the ZEV 6100 was only $2431 after tax credits; I couldn't build the bike for that. So, it was a no-brainer; I bought the 6100.
When my bike arrived, I was immediately impressed with how well it was built. The paint was beautiful and the body panels aligned perfectly. It just looked much better than I imagined. I unpacked it, gave it a quickie charge, and took it for a spin. Everything worked great once I remembered to use the three-speed electronic transmission (first gear only goes up to 28~30mph).
After, getting the bike registered and having more time riding it, I was impressed with how easy it handled and how stable it felt to ride. It didn't take much time to realize the speedometer wasn't accurate and read high like many other scooters. So, I installed the large screen version Cycle Analyst CA) computer and am so glad I did. The CA provides:
-accurate speed, mileage, voltage, amps, miles, WH, AH, WH/Mile, max speed, avg speed, and battery pack life statistics (#of charge cycles, total AH, total miles).
-user programmable throttle allows control over the throttle, allows limiting of speed, limiting of max current, via a pot/knob can dynamically limit torque for greater range, and allowing partitioning of battery to create a reserve partition (virtual spare battery).
all that and the CA looks great on the handlebars; just like it was meant to be installed on a ZEV.
So what is the ZEV 6100? It is a 6100w (or 7200w with 120A controller), 77V, 40AH LiFeMPo4 w/per cell BMS maxi-scooter, with a max speed of 63mph (I verified mine to 64mph). It comes with a cool running 8500w cont. rated hub motor and air shocks. It is 78" long with a wheelbase of 58.5". Weight is under 300 lbs. Adequate headlights (I upgraded to 35w halogens) and very bright tail lights (total 90watts each!: running light 55w and stop light 35w). With those lights shining back at the cars behind me, cars keep their distance from me at the intersections.
Range - always a tough one to describe as everyone rides differently and over different conditions. When I bought the bike I went by the standard divide by two rule when looking at manufacturer's specs as real world riding is much different from riding at a constant speed on a perfect track. Accelerations just suck power. The max distance I have gone without recharging is 36 miles. But that is because the streets in my rolling hills area are all 40-45mph min. I don't take the battery down more than 32AH 80%DOD. Typically, I get 1.25mile/AH at 35-40mph, 1.0mile/AH at 45-50mph, and .75mph/AH at 55-60mph. Or looking at it another way, I typically use 69WH/mile (min 62WH/mile max 79WH/mile) on a trip.
Acceleration - at low speeds its zippy; at high speeds its adequate with 100A controller and only 77V. Best way to describe that is it is easy to break away from the pack of cars at intersections (pet peeve - getting stuck behind a car in the left turn lane - cars turn too slowly). If I find myself in the wrong lane at an intersection, I usually don't have a problem overtaking and getting in front of the car in the other lane (only problem was when a car was trying to do the same thing). This is with the standard 100A controller. But you can also get the 120A or 130A controller if you want more acceleration.
Hill climbing - with the standard 100A controller I do OK in this area. It would be much better for completely flat boring terrain. I probably should have ordered the 6100 with the 120A controller for highway use here. I have a steep, long hill between Boulder and Golden that slows me down to 48mph on this windy 55mph highway. The only saving grace is that there is usually a car that is also struggling to get up the hill, so I can just get behind them. In addition to 120A and 130A controllers, ZEV also has "alpine" motors which provide much more torque but with giving up around 10mph in speed. So I could have gone with the 6100 w/120A controller or a 7100 alpine and had the same max speed but much more torque.
All in all, it is a great ride and I rarely drive a car anymore. PM me if you would like help in picking the right ZEV for you.