What is an Inverter? The i in Honda Generator model names stands for inverter technology. This means it will work on most all appliances including battery chargers. Most generators create power that battery chargers don't like thus they don't work right.
According to Marc Leupi, pump, power and light product manager at the Wacker Corp.: "Inverter generator technology is exciting because
it allows the engine to run only at the rpm needed to power the load,
saving fuel and reducing sound levels. Another major innovation for the
protection of personnel is a full GFCI [ground-fault circuit
interruptor] sensor now available on some models. This system monitors
and protects against ground faults on all outlets, not just the 120V
duplex outlets like on most generators. This system is also more
durable and reliable than standard GFCI outlets, which are known as
high-maintenance items.”