It is better give up the idea. Cause if we really need enlarge the power, first we need parallel more inverter switch. Second we need use bigger power transformer. In fact, this 2 condition is not easy to realize. Because, for a fully
designed inverter. the internal space, position, and layout is fixed. Even we just add some inverter switch, it still hard to install. Otherwise, if replace a bigger power transformer is more uneconomical. Because the transformer is the
expensive part in inverter. If we change it with bigger transformer, the replaced transformer will be wasted.
Otherwise, other component’s power was enlarged, but the battery capacity haven’t enlarge, instead the inversion time will be shorten. Another condition is maybe we need enlarge the battery capacity.
In general, it is better to buy a new big power inverter
is more convenient.