Generac PWRcell energy storage system

[dlgoff]

TL;DR Summary

Do these things work?

I'm curious about the ads I've been seeing on TV about these Energy Storage Systems. Anyone have any knowledge about them?

image from https://sunwatts.com/20-2-kwh-generac-pwrcell-energy-storage-system/
Thanks in advance

 

[anorlunda]

Compare them with the tesla power wall.

If you're looking for consumer reviews, search for the power wall first because it has been on the market longer.

If you want technical specifications, look at the Generac web site.

 

[dlgoff]

power wall

I see nothing useful there.

 

[berkeman]

Compare them with the tesla power wall.

https://www.tesla.com/powerwall

It looks like the smallest model is comparable to the Tesla Powerwall (13.5kWh). Both have 10 year warranties, and the specs look pretty comparable. The SunWatts page has a link for customer reviews, but I didn't see any reviews in my checking (I could have missed them).

Don -- do you have a PV system that you want to use with this battery system? Or will you just be storing energy from the grid for use when power is out? I know some folks here in Silicon Valley up in the foothills near me that use the Tesla Powerwalls to back up their home for the PG&E "Public Safety Power Shutoff" events that happen during peak fire danger periods. They seem satisfied with them so far. I don't know anybody personally who is using them with their PV system.

 

[dlgoff]

do you have a PV system that you want to use with this battery system? Or will you just be storing energy from the grid for use when power

I was just curious about them. I have no system.

 

[berkeman]

I only skimmed the specs, but it looks like the Powerwall can take DC input directly (like from a PV array) and deal with the DC-DC conversion to store the energy in the batteries. Seems like a pretty flexible system. Kind of pricey for just energy storage for PG&E PSPS events, but might make sense for homes with a PV array.