Hybrid Inverter

Costs

• $800 for 6kW [1].
• 10kW is $1400 [2]

But That is Ridiculous

If grid goes down, so does your solar power! That's not acceptable for critical operations during the day. There is a complex solution: essentially set up another off-grid inverter system that powers your on-grid inverter without grid. Ridiculous and expensive. [3] and [4]

Solution - OSE Hybrid Inverter System. No batteris, up when sun is up, no grid needed.

Disadvantage: up only when sun is out.

Advantage: no batteries needed. Switch back to grid as needed.

Key: have enough PV to run everything that you need, and to shut off loads via a smart controller. Using cheapo 63A automatic transfer switches with Arduino will work. Get out the CNC circuit mill and build circuits as needed.

Hybrid Inverters

• Have a small bat bank and can operate without grid. [5]
• Not clear how the solar mode operates - does it put out the full power of the panels?
• $1600 - hybrid 6kW solar inverter- does it work at full PV output without batteries? Does it work at full PV output when grid is down, and sun is available, on a small battery? [6]? Does it work at full PV output when grid is down and there is no battery? If this thing can work full PV output - with grid signal (not using grid) - then this meets our needs. Or, does it switch 100% to grid whenever it's overloaded
  • On-grid - it's not pass-through - max grid power it puts through is 6kW - [7].
    • This would be impractical for most homes if they are not energy-efficient smart homes. Does not leave chance of higher power use, such as heavy power tools
  • Hybrid inverter allows battery-only, grid-only, and solar only modes: