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Today you can already get 51.2 V, 16 kWh batteries complete with balancer and BMS from a European supplier for 1200 € (1400 US$): https://www.nkon.nl/novat/nkon

• torginus 1y ago
  That looks quite a bit cheaper than the pricing I'm used to seeing, like less than half - not saying they're bad, but probably there's a DIY and risk factor involved compared to buying a more established brand like BYD or Huawei. I'm just pointing out this is way lower than typical pricing
  • adwn 1y ago
    Maybe, but I think the premium charged by the main manufacturer's is unjustifiably high. Those battery boxes are relatively dumb: besides the cells, they just need some voltage and temperature sensors for monitoring, some power electronics for balancing, a microprocessor, and an enclosure with connectors. Unlike a grid-tied inverter, this is a really simple system, and there's no way a 500–700% price premium over the cells is reasonable.
• SirFredman 1y ago
  And the nice thing is, prices will only get lower. They also have a 32.15kWh system for €3500,- which is insane.
  • adwn 1y ago
    Unfortunately, almost all three-phase [1] on-grid inverters that are on the market, especially hybrid inverters, only support batteries with much higher voltages, like 150 V or even more. [1] Three-phase wiring in homes seems to be very rare in the US, but is extremely common in Europe.
    • archi42 1y ago
      The trick is to get an inverter with a 48V battery interface, that's not locked down to a specific manufacturer. But you're right, most installers do high voltage batteries.