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I don't know about you, but I'm really glad to have dumped Unifi now. I'd still choose Frigate over Unifi imo, especially if you have it set up already. I'm looking at these video entry systems from Grandstream. Grandstream's Wifi gear is also great and runs either cloud, hosted or embedded on a flying saucer depending on your preference.

I wouldn't use that Loxone power supply personally. It's not scalable way too expensive. @Rob99's N+1 set up (especially as Meanwell also provide a UPS and ATS solution) is straight out of datacentre best practice and given with an 8-way 960W/40A devices it's scalable to 7.68kW DC power, on paper, it's awesome. However, given you have the LuxPower setup, if you feel you're worried about the 16A max, then my recommendations would be: 1) Get a second inverter and split the solar and batteries across both, thus you get redundancy, twice the MPPTs and double the EPS power. Especially the redundancy point given how critical you're saying those sump pumps are. 2) Use Loxone's Load Manager logic block and have Loxone govern peak loads to keep it under 16A, including those sump pumps, so your power usage is actively managed and 'smart' based on the actual load being used in real time. I'd still get a second inverter though and have peak load to 32A with an emergency 16A if one of the inverters goes kaput. You say the inverter doesn't switch quick enough? It may be a wiring issue as it's not detecting grid power loss fast enough. Have a look at that, as even a 'slow' switch should be 2-5ms, which is well within what a capacitor in a DC PSU should be able to withstand. If not... Meanwell seems to have your back covered again.