Short Answer: You will need 2 Marine Deep Cycle Batteries that are isolated OR 2 SuperSting™ AC/DC Power Supplies.
Boost Mode using 2 batteries:
Marine deep cycle batteries with ~50-100Ah capacity will work best. A second battery can connect to the boost connection to allow the full 200W maximum output. Boost mode is used anytime contact resistance is below ~1800 ohms.
Example Setup Below: Both batteries are isolated and connected with their own cables.
Note: Charging these batteries requires a deep cycle type charger with at least 6A output. Using a lower cost trickle charger (<2A output) will result in incomplete overnight charges and low battery after 1 or 2 days in the field.
Boost Mode using 2 AGI SuperSting™ AC/DC Power Supplies:
You may also choose to use 2 AGI SuperSting™ AC/DC Power Supplies. It has been manufactured with the proper specifications for the main and boost power so that you can run on a small gas powered generator (900W) using 120/220V AC power. The generator does not need to be grounded.
Example Setup Below: Main and Boost AC Power Supplies with recommended gas generator
Important Note: Never attach these power supplies to AC power in a building as this will cause a ground loop and potentially cause damage.