It depends on what you need to run and for how long. The Load Calculator takes your appliances, your backup hours and your average use, and names the battery that fits.

Check compatibility, connect the cables, test. Livguard inverter batteries are built to pair with Livguard inverters, so the match is already made — and a dealer will do the install if you would rather.

The one sized to your actual load, not the largest one on the shelf. Start with the Load Calculator: it reads your appliance list and returns a capacity.

The inverter is the same. The capacity is not — an office runs more load for longer, so it needs more of both. The range covers each case.

You pick the devices you want running through a cut, say how many hours of backup you want, and it suggests the inverter and inverter battery to match. Open the Load Calculator and try it.

A tool that totals the power your appliances draw, so you can choose an inverter and battery against a real number instead of a guess.

List every appliance you want running during a cut, note its wattage, multiply each by the hours you need it, and add the totals. That sum is your load.

It is what keeps the inverter inside its limits: the right size prevents overload shutdowns, holds performance, and points you at a battery that will actually deliver the backup you asked for.

Yes. Enter the appliance wattage and how you use it, and the same calculation returns the correct capacity for either.

Yes — summing the wattage of everything you plan to run gives you a generator requirement the same way it gives you an inverter one.

Overload shutdowns, reduced performance, and in the worst case damage to the system. Match the inverter to the load you actually have.

They are counted separately. A UPS is sized on the devices plugged into the UPS; an inverter is sized on the devices running off the inverter.