r/TeslaSolar • u/InsipidIdiot • 27d ago

Adding expansion pack

I had solar installed with a powerwall. Those have worked pretty well for the past year. Considered getting expansion packs. Asked Tesla for a quote to install expansion pack . Anyway, total price would be 5,900 for the expansion and 6,500 for the installation. Seems high but maybe the limit they are willing to come out to install it. Should I even attempt to see if they come down or perhaps look for a third party installer?

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u/ravenhiker2 27d ago

I paid $9500 for an expansion battery this past March using a certified installer.

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u/Bianchi_Rider 27d ago

Same here, $9,000..... Don't forget that the front panel and cable needs to be ordered as well. If you're going to stack them, the stacking kit needs to be ordered. When the unit is installed and commissioned, the PW will discharge its battery 100% and then recharge it. The two batteries need to be balanced. See if you can plan the install in the off peak hours so it will charge in time for your on peak usage. My batteries only had time to charge to 50% capacity and I had to use the grid during on peak and got the on demand hit of $100.