Battery Backup

Round-trip efficiency explains why your home battery never gives back 100% of what you put in. Typical numbers and what affects them.

Compare GM Energy’s PowerBank and Tesla Powerwall 3 on capacity, power, vehicle-to-home integration, and who each system fits best.

Find out how many EV miles you can really add from a home battery during an outage, with a simple capacity-to-range chart.

How to calculate your home battery’s real payback period using your own utility rates, incentives, and arbitrage or VPP savings — not an installer’s best-case slide.

Backing up your whole panel drains a battery in an hour or two. A critical load panel and automatic transfer switch can stretch the same battery to 24-48+ hours.

Where you’re actually allowed to put a home battery is one of the most common places a battery installation runs into trouble — not because the battery itself is unsafe, but because the placement rules that govern it are scattered across code documents most homeowners never see until an inspector flags a problem. NFPA 855,

Home batteries and heat pumps have become a natural pairing as more households electrify heating, but the question of whether a battery can actually carry a heat pump through a winter outage gets far less attention than the equivalent summer question about air conditioning. The honest answer is that it depends heavily on outdoor temperature,

Running an extension cord out a window during an outage is the instinct most people start with, and it’s also the most dangerous way to power a home from a portable power station. Connecting a power station properly to your home’s electrical panel — through an inlet box and a transfer switch — isn’t just

More solar panels or a bigger battery? Here’s how to use your own utility bills to figure out which $5,000 upgrade actually pays off.

DIY battery installation can void your warranty and complicate an insurance claim. What is actually legal to do yourself, and where the real DIY lane is.