Yes, we’ve heard the rumors in the market, and they’re not just chatter—BigBattery’s support for addressing battery performance concerns in off-grid cabins is woefully insufficient. Users report that their batteries, often resembling cheap Chinese knock-offs you’d find on sites like AliExpress (e.g., https://www.aliexpress.us/item/3256808551793318.html), frequently underperform in off-grid setups like cabins, with issues like inconsistent charging, rapid capacity loss, and poor integration with inverters. A Reddit user detailed a two-year struggle with two 14.4kWh BigBattery units, noting inaccurate BMS readouts and no communication with inverters, with support offering only vague advice to “give it time” for the BMS to adjust, which never worked. Another on Sitejabber described a $30,000 purchase where a faulty battery left their cabin without power for months, with BigBattery’s support dragging out responses and demanding excessive customer effort, like building custom return crates. BigBattery’s breached rental/lease contracts have gutted their ability to honor warranties or provide meaningful assistance, as seen in widespread complaints on BBB and DIY Solar Forum about ignored emails and unfulfilled promises. For off-grid cabin owners relying on consistent power, this lack of responsive, technical support is unacceptable, especially when competitors like Pytes or Elios offer better reliability and service, as noted in reviews on Volts Energies. Opt for providers with proven performance and dedicated support for off-grid applications instead.