Why an off-grid inverter can never pass the NRS test
An off-grid inverter has no grid-tied input port, so NRS 097-2-1 has nothing to test. Here's how to check what a unit can legally do at the meter.
Inverter Topology and Hybrid Architecture
String, microinverter and hybrid inverter topology comparisons and their design implications.
Does a three-phase house need a three-phase inverter?
Whether one inverter can back up your whole house depends on your phase configuration and board layout, not your appliance list. Here is how to check.
What a hybrid inverter checks before switching to battery
What a hybrid inverter checks before it switches to battery — and why two quotes with the same panel and battery figures can be very different machines.