moksha wrote: great advice, unfortunately computer > netgear wifi router > cable modem all via ethernet which if I have read you correctly does not sound good
Best protection for any appliance is typically found in its power supply. But unfortunately, a power strip protector can compromise or bypass that protection. Read the numeric specs for any plug-in protector. It does not even claim to protect from any typically destructive surge.
Two problems to address. First is to fix (or replace) defective items. Best way to determine what can be fixed is to first define the incoming and outgoing path through each appliance. Surges seek earth ground. That would be one path. Now, what was the incoming path that used each appliance as a connection to earth?
Another defined a most common path via computers. Incoming on AC mains. An adjacent protector can bypass protection inside the power supply. Now the connection to earth is via motherboard (often not damaged) and modem (damaged) to earth ground via the phone line.
Moving on to averting future damage. The only protector that does any effective protection must connect short (ie 'less than 10 feet') to single point earth ground. No power strip or UPS has that earth ground. Those other 'solutions' claim to stop what three miles of sky could not. Or claim to absorb hundreds of thousands of joules when rated for only hundreds of joules. Total nonsense.
How does near zero protection stop destructive surges? Well, it is just above zero. That means it can claim 100% protection in advertising. They know a majority will ignore numbers. Only believe the advertising. Read each numeric specification. It does not claim to protect from destructive types of surges. Its hundreds of joules say near zero surge protection.
Informed homeowners earth one 'whole house' protector from a long list of more responsible companies including Square D, General Electric, ABB, Intermatic, Siemens, and Leviton. A Cutler Hammer solution sells in Lowes and Home Depot for less than $50. Do you want protection for everything? Or more mythical devices with near zero numbers?
Each damaged items made a connection from an incoming surge to earth. That path to earth determines what can be fixed and what is best binned. This you also know. Nothing can provide effective protection once that energy is permitted inside the house. Nothing.
Either earth hundreds of thousands of joules harmlessly outside. Or that energy goes hunting destructively. Selects appliances that make a best and destructive connection to earth. Protection is always (as was true even 100 years ago) always about earthing energy harmlessly outside. A protector is only as effective as its earth ground - an all so critical 'less than 10 foot' connection.