As your budget allows, install sump pumps with a water alarm and battery backup, and sewer backflow valves, elevate your furnace, water heater and electric panel, and waterproof your basement. Reinforce windows and doors with ½-inch marine plywood pre-cut to fit or installing permanent storm...
For example the following unit from APC will run Xcalibur/Gemini from a 400V 3-phase input for about 100 minutes: APC Smart-UPS VT 10kVA 400V w/3 Batt Mod Exp to 4, Start-Up 5X8, Int Maint Bypass, Parallel Capable + (1)SYBT4 Battery Unit Description Voltage V Frequency Hz X-ray ...