Ya, two 200A breakers are going to be around $1000 cheaper than one 400A breaker. Once you get past 200A, the price goes up pretty close to exponentially with ampacity.
If the documentation with the equipment says that it's intended for a 400A feed, then it's OK. But, I think the chances are upwards of 90% that this setup is intended to feed two 200A MLO panels, and isn't listed to feed a single 400A panel.
[This message has been edited by SolarPowered (edited 06-30-2006).]
