Can you hook a microinverter to a battery bank to feed some energy back to the grid?

[u2builder]

I have a modest grid connected PV system that I recently installed. I also have a small off grid micro hydro system which has been in operation for 35 years. It uses a 24V alternator to provide power to a small battery bank. A 2500 W off grid inverter provides power to the house via a GenTran transfer switch that allows me to choose what circuits are on hydro and which are on the grid. I have a diversion controller that shunts 24 V power to my water heater when the batteries are at full charge, which is pretty much all the time. I have to match my average house load to the hydro output, and err on the very conservative side so as not to flatten the batteries. So the diversion controller is constantly cycling. When the stream is a full flow (winter, spring, late fall) I put out about 600W.

I am wondering if I could connect a typical 24V nominal 200 or 250W microinverter directly to my battery bank and wire 220V output back to my panel to dump more energy into the grid? Obviously I would dumping correspondingly less energy to my water heater via the diversion controller but I have a sense the overall system efficiency might be greater. BTW, my battery bank usually cycles between 23.5V and 27.5 V as per the settings on my diversion controller and alternator.

I generally like the way my standalone system operates and the backup it provides during power outages, and don't want to go to the trouble or expense of converting it to a grid tie or hybrid system but I am curious if I could tie in a micro inverter as described above as it would be simple and inexpensive if it were possible.

[Wy_White_Wolf]

If you are expecting this to save you money you need to look at the guerilla hookup thread. Doing so could make you pay the PoCo for what you send to the grid.

http://www.solarpaneltalk.com/showthread.php?20889-Guerilla-Installation-Metering-Issue&highlight=guerilla

WWW

[Sunking]

Why would you want to do such a stupid thing? Do you have more money that you know what to do with? If so donate it to charity instead of giving it to the POCO. Essentially what you are saying is you make a product that cost 60-cents and sell it for 12 cents. Not very smart.