Honda Power Products EU20i Manuel De L'utilisateur page 34

Parallel operation
Please read the item ''GENERATOR USE'' before connecting any
equipment to be used.
Use only a Honda approved receptacle box for parallel operation
(optional) when connecting two EU20i generators for parallel operation.
Make sure that the electrical rating of the tool or appliance does not
exceed that of the generator. Never exceed the maximum power rating
of the generator. Power levels between rated and maximum may be
used for no more than 30 minutes.
Limit operation requiring maximum power to 30 minutes.
Maximum power in parallel operation is:
Except U type : 3.6 kVA
U type :
For continuous operation, do not exceed the rated power.
Rated power in parallel operation is: 3.2 kVA
In either case, the total power requirements (VA) of all appliances
connected must be considered.
CAUTION:
Substantial overloading that continuously lights the Overload indicator
(red) may damage the generator. Marginal overloading that temporarily
lights the Overload indicator (red) may shorten the service life of the
generator.
4.0 kVA
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