When Hanoi streets flood — and some streets flood several times each rainy season — the electric rider has a question the petrol rider does not: is water a mechanical nuisance or an electrical event? The answer is mostly about depth, and a little about the rating.
What the ratings actually cover
The IP code is tested against defined conditions, not monsoons. IP65 — the Weaver 200’s published rating — means dust-tight and protected against water jets from any direction: rain, spray and splash, not submersion. IP67 — the Weaver++ — adds brief immersion to about a metre. Neither rating covers sustained wading, and neither covers water entering through a pack bay left open or a cover damaged in a fall. If a machine’s rating is not published (several Vietnamese models do not publish one), assume nothing beyond the manufacturer’s warranty terms.
Depth rules of thumb
| Water depth | Read |
|---|---|
| Spray, film, shallow sheeting | Within any reasonable sealing — ride normally, gently |
| Ankle-deep, moving slowly | Judgment call: know the road, avoid potholes and open drains |
| Calf-deep or fast-moving | Do not ride — petrol or electric, the hazard is the road, not the bike |
The honest reason to refuse calf-deep water is not electrics: it is that flood water hides open manholes, drowned potholes and current, and the general flooded-street riding guide covers those hazards for every bike. The electric adds one more: standing water is the one condition a sealed-but-aged machine meets where a compromised seal shows up.
Never charge a wet machine
The absolute rule is charging: a bike that has waded gets dried before it gets plugged in. Wipe the pack bay, check the connector faces for water, and let the machine air before the charger comes out. Charging a machine that has been through deep water without inspection is the single genuine fire/electrical risk in this whole topic.
After a wade
After any real soaking: check the display for error states, confirm the lights and horn, and watch the first kilometres for anything odd. If the bike sat in standing water rather than merely ridden through it, give it a proper once-over — the checks in our battery-health article take ten minutes.
The boring summary: rain is a riding problem, not an electrical one; deep water is a routing problem first. Skip both with the same decision: wait an hour for the streets to drain.