Great on pre-sales, but after sales service falls short if your install goes wrong
After having a bad experience with a solar install back in 2016, i decided i wanted to go with a larger company and one with a great review score, and Heatable ticked both boxes. Heatable didn't disappoint either, offering a great deal on Tesla Powerwall 3s and excellent pre-sales journey. I was supper happy i went with them (up to this point) What i didn't appreciate at the time is how Heatable works compared its competitors; Heatable is a boiler and renewable sales company, but they don't have their own engineers, instead relying on 3rd Party installers. I didn't initially see that as being a problem after watching their youtube install videos, until it was. Heatable installed a Powerwall 3 for me back in November 2024 and it went well, then on Wednesday 23rd April 2025 they sent their contracted installers back to add a DC expansion battery. During the install some issues came up, but the engineer left and I though all was well, that was until 7pm when the lead Powerwalls drained to 0% (ignoring the reserve), then shutdown and went into battery fault mode. It appears a critical step didn't happen during the install, which is the 2 Powerwalls must be synced, by running a calibration step to balance out their state of charge. If this doesn't happen, then one battery can complete discharge to 0% before the other and the the system will enter a battery fault state. Well that is exactly what happened! I immediately notified both Heatable and the installer by email with phot