Yes, that works too. Using a manual switch, the circuits are shut off before they are re-energized on the other supply, and then switched back only when you choose to do so.
This does tie you to the house at specific times, otherwise the transfer you need won't occur. Either the batteries don't get used, or they get overused if you miss a switch-over.
That may be fine. Also consider if the switches in the transfer are designed to be operated daily, or if they're intended to be used occasionally. Circuit breakers are NOT designed to be switched manually over an over again and have a short life if used that way. Whether a manual transfer switch has the same reliability limitation, I don't actually know.
The reason I brought up the inverters is because they free you from this responsibility.
http://www.xantrex.com/documents/Discontinued-Products/SW2512MC-SW4024MC2UserGuide.pdfhttp://www.outbackpower.com/downloads/documents/Make_the_Power/FXR_A/fxr_operator.pdfIn the Xantrex, go to page 89 of the PDF (81 on the page) and read about Utility Backup Mode. In the Outback, go to page 19 and read about the Mini Grid Mode.
Built-in transfer switch. Automatic. You choose the point of transfer. Set and forget it.
Pick any inverter designed for use in RE systems and you should find a system that works this way. I just happen to be most familiar with these two.
BTW: The Xantrex has 2 AC inputs so you can connect both the Grid and a standby generator. And it will start the genny for you.
I also suggest you draw up a system schematic (like the ones in the Xantrex manuals) to see your system with a manual transfer switch. It will not be any simpler than relying on the inverter to transfer for you.
There's nothing wrong with manually managing your power system, but it's not as much fun after a few years.
In case you're still considering the transfer switch, like the one you linked, ONLY works on AC.
You will want to keep your inverter connected to the batteries at all times (but have a big fat disconnect switch just in case) so that things like the internal clock and user settings don't get wiped.