J1772 EV Station Charging for ONYX RCR 72V and 80V

This procedure covers J1772 EV-station charging for ONYX RCR 72V and 80V batteries. Check the actual charger input rating, battery/output compatibility, adapter rating, and station rules before connecting. A J1772 adapter does not convert mains voltage.

The original 72V stock charger described here is 120V-only. Do not assume another charger is compatible because its battery output voltage matches. Home charging and balancing are covered in Battery Charging at Home.

Basic Charging Rules

A few simple habits cover most of what matters.

• Charge only when the battery temperature is in the 40°F-105°F (4°C-40.5°C) recommended range; absolute limits are 32°F-113°F (0°C-45°C)
• Riding in freezing weather is fine
• Store the battery indoors overnight during winter
• Do not charge a frozen battery

These rules matter more than charging location. A battery that is too cold should be warmed naturally before charging.

Battery BMS App

Battery temperature and pack status can be monitored through the BMS app.

• SuperPower BMS - iOS
• SuperPower BMS - Android

Charger Compatibility

Not every ONYX charger behaves the same way. This is especially important when riders begin looking at 240V charging or public EV station access.

Stock 72V chargers cannot be used with EV charging stations.

This is one of the biggest differences between the 72V and 80V charging setups.

23Ah Balancing Compatibility

The ONYX 23Ah battery requires a charger that properly maintains constant voltage in order to balance correctly.

Not all chargers that can charge the battery will successfully balance it.

A charger may reach full voltage and turn green while still failing to balance the battery.

Balancing requires the charger to hold the battery at full voltage while current continues to taper into the low-wattage range.

This is why a battery can appear fully charged but still behave as if it is weak or failing.

Some riders use external devices such as the Charger Enhancer CE140 to improve constant-voltage behavior on chargers that would otherwise terminate early.

This can help extend the balancing phase, but it does not fix fundamentally incompatible chargers.

Charging Safety Notes

Charging safety comes down to connector limits, charger settings, and continuous load.

• Do not run more than three 80V 10A chargers on one J1772 adapter
• 20A chargers should never be set to 20A on 5-15 adapters
• 20A chargers may be used on 5-20 connectors only if limited to 16A continuous

• 110v Socket Voltage Checker

A charger pulling from the wrong connector or set too high for the circuit can overheat plugs, adapters, or wiring.

Charger Power Example

Charging power makes more sense when AC input and DC battery output are separated.

Example:

240V × 5A ≈ 1200W input power
90V × 10A ≈ 900W battery power

The difference is normal conversion loss and charger heat.

This is why charger input current does not match battery charging current directly.

EV Station Charging

Many ONYX riders eventually try charging from public EV stations using a J1772 adapter.

Most public stations used by riders are Level 2 chargers rated around 6.24 kW (30A at 208-240V).

Public EV charging can work for ONYX charging, but only if the charger itself accepts that input voltage.

EV charging depends entirely on whether the charger supports 208-240V input. The adapter does not determine compatibility - the charger does.

Compatibility Rules

• EV charging only works if the charger supports 208-240V input
• Stock 72V chargers are 120V-only and will not work
• Stock 80V chargers support 240V when switched correctly
• Variable chargers must explicitly support 240V input
• J1772 adapters do not change compatibility

Quick Compatibility Summary

Why EV Power Is Different

A normal wall outlet uses:

• Hot to send power out
• Neutral to return power

EV stations use:

• Hot
• Hot

Power flows between the two hot wires, which is how EV stations supply 208-240V AC.

That difference is why public EV charging works only with chargers designed to accept that type of input.

J1772 Adapter Reality

A J1772 adapter is a passive adapter. It does not convert voltage, regulate current, or make an incompatible charger compatible.

It simply passes the two hot wires from the EV station through to a household-style connector.

Because standard household-style connectors were designed around hot + neutral, using them with hot + hot power is outside the original certification intent of many connectors and adapters. That is one reason many of these adapters are not UL listed.

• J1772 to NEMA 5-20 Adapter With 240V Pass Through

Adapter and Connector Limits

• adapters do not limit current
• adapters do not protect the charger
• connectors can overheat under continuous load
• always match:
  • adapter rating
  • connector type
  • charger current

What Happens If You Use the Wrong Charger

• EV stations do not limit voltage to match the charger

• 120V-only charger connected to 240V:

  • high risk of immediate charger damage
  • internal component failure possible

• incorrect voltage switch setting:

  • unstable operation
  • overheating or shutdown

• incompatible charger:

  • no charging or unsafe behavior

Real-World EV Station Behavior

• station output can vary
• shared stations may reduce available current
• some stations may shut off unexpectedly
• connection quality affects stability

Environmental Considerations

• avoid charging in heavy rain
• keep connectors dry and clean
• do not charge immediately after aggressive riding
• allow battery to cool before charging

Charger Switch Explanation

The 120V / 240V switch on the ONYX charger is for input voltage configuration, not charging speed.

Its job is to tell the charger what input voltage range it should expect.

This switch does not increase charger output. It allows the charger to safely operate on the correct AC input.