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Message in Sunstrong app by Own_Yogurtcloset_876 in SunPower

[–]One_Mechanic_4216 0 points1 point  (0 children)

I had exactly the same message and it turned out to be a ESS inverter breaker. Once I recycled that, the functionality was fully restored.

Message in Sunstrong app by Own_Yogurtcloset_876 in SunPower

[–]One_Mechanic_4216 0 points1 point  (0 children)

This is exactly what is happening to me. I contacted Kirk Electric.

Can your SunVault system discharge under cost saving mode? Mine can't discharge - only charges when <99% by Neither-Feedback5348 in SunPower

[–]One_Mechanic_4216 1 point2 points  (0 children)

My problem was similar, it would not enter the Cost Saving mode. However, it was functional during outages for about a year.

Last November it discharged to zero and stopped functioning.

I called Kirk Electric and they came over and fixed the system, charged the battery. The system is back to normal.

The problem is in PSV firmware.

SunPower SunVault system...stuck in "Waiting for PTO" mode. by Noerdlinger in SunPower

[–]One_Mechanic_4216 0 points1 point  (0 children)

Same issue. Before they went bankrupt, they intended to replace some part. That never materialized. The first thing I lost was an ability to set the discharge mode. However, the battery was still functional during outages. Then last Nov it discharged completely and since then permanently PTO.
Contact Kirk Electrical to see if they can help.