A home security system's power needs look nothing like a fridge or a generator's typical target load — it's a small, continuous draw that needs to run for potentially days, not a short high-power burst.
Why security systems are a low-draw, long-duration problem
A typical wired security panel, cameras and a router together might draw only 20-50W continuously — tiny compared to a fridge, but the goal is often multi-day runtime, not multi-hour, since a security system going dark is exactly the vulnerability you're trying to avoid during an outage.
Goal Zero Yeti 300: built for exactly this kind of load
At 297Wh, a 30W continuous draw (cameras, panel, router) could run for roughly 8-9 days on a single charge — well beyond what most outages last, and the unit's 4,000+ rated cycle life means years of standby-ready reliability.
EcoFlow RIVER 3: a lower-cost alternative
At 230Wh, still several days of runtime for the same low-draw security load, at a lower price — a reasonable choice if budget matters more than squeezing out the last few days of runtime.
Keep it charged and ready
Unlike a generator, a power station dedicated to security backup should simply stay plugged in and topped off — most current units include charge-management systems that make this safe for long-term standby use, so it's ready the instant power drops rather than needing to be located and set up.