Outdoor Eltek UPS Battery Upgrade: LiFePO4 or Sodium-Ion Battery?
It’s 2 A.M. on a freezing Tuesday in January. Your phone buzzes. It’s a system alert: a remote telecom tower in a mountain pass has just dropped offline. You check the diagnostics. The solar array is fine, the Eltek UPS is fine, but the battery voltage is plummeting. Fast. The LiFePO4 pack, even with its…