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A product manager in Chicago emailed me about a smart lock. His device ran on a 3.7v lipo battery, and the first batch shipped with the cell that c...

A buyer in Texas emailed me in July. Three lines. "10kWh LiFePO4 power wall , wall mounted, quote please." No electric bill. No daily load. No inve...

The first time I had to explain a lithium polymer aa cell to a client, he was holding a failed prototype that his previous factory had shipped with...

Solar panel storage systems have a strange problem. Everyone talks about them, most homeowners assume they are a box with a plug, and almost nobody...

Ask ten installers where a home energy storage system should go and you'll get ten confident answers - garage, basement, laundry room, outside ...

I've seen plenty of buyers start shopping for a solar energy storage system by staring at capacity numbers - 10 kWh? 20 kWh? - and only afterwa...

We get asked the same question at least once a week: what actually counts as utility scale battery storage, and is it worth the money? The short an...

A customer tells me they want "a BESS." That one sentence can mean a $2,000 stackable home unit or a $300,000 container sitting in a solar farm. Bo...

The residential solar storage market is growing faster than most buyers can keep up with. Homeowners in Europe, Africa, Southeast Asia, and North A...

A grid battery is often described by one large number. That number is useful, but it is not enough. A project marked 1 MW could discharge for fifte...

A 10kW solar system does not automatically include a 10kWh battery. Nor does the label mean that the system can supply 10kW for ten hours. That dis...

Backup Power Starts With the Loads, Not the Battery A power outage has a way of clarifying what a household actually needs. The refrigerator matter...