Need Help in designing Pspice model of photovoltiac system including boost and PWM

Hey,

I am designing a PV system to connect it to grid . I have already designed the PWM but I need to include a battery for the storage purpose but I am not able to implement if. If anyone has already done a Psipce project on the photovoltiac with bidriectional converter please forward me the layout and description so that I can understand and proceed.....email me at soul_samir@hotmail.com