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I have a HiSun Vector E1 (as they're called here in the UK) and have been running it for about a year now. It has an annoying problem that my dealer has not yet managed to fix. On a full charge, at the start of the day, it works fine - albeit not the quickest machine in the world. I use it on my hill farm here in Scotland, and it has to climb a bit, although nothing that would leave you out of breath walking. The E1 copes with these hills no problem, until it's done about four or five miles, then it starts to struggle noticeably, and throws of the 4C53 error on the dashboard readout - low voltage according to the manual. Sometimes it does this even while the charge level indicator is showing a full charge. It's been back to the dealers twice now, and they've replaced all of the batteries. I've emailed the UK distributor for HiSun in the hope of an answer, but as yet have had no response. My dealer is trying to get an answer from them too, before taking the machine back to try and fix it again. Meantime I can only use it for a short while each day. I'm no electrician, so has anyone on here any idea what might be going on? It seems that it is struggling to draw enough power from the battery pack going uphill, leading to a voltage drop that trips the error code. But if that's the case, then the E1 is surely not fit for purpose.

Sorry if this is on this site new to going on forums I have a 2021 hisun sector e1. I've seen people say they put lithium in can someone point me to what and how many lithium batteries to put on this bike. Thanks I notice up hill the low range says 400 amps on the dash.

Installed a radio/media player in my new Hisun Sector E1. Got a universal under dash kit from Amazon for $13, a radio/media player from Walmart for $17, and two speaker kits with grills from a friend for $10. Had some wire, connectors, and screws lying around. Mounted the radio in the plastic under dash kit. The radio is amazing for the price. It is only about two inches deep, but has Bluetooth, USB, and AM/FM radio. Mounted the speakers in the panel under the seat. Ran the wiring through the drive shaft tunnel. Installed a in-line fuse for the + wire and tapped in to the head lamp switch for the ign on wire. Tapped in to a ground wire in the wire loom behind the switches. I use this to play my tunes from a flash drive. I did not even bother to connect an antenna to it. Because the E1 is electric there is no engine noise to drown out the music!