Solar pass through power?

Is there a solar generator that has an inverter (charge controllers?) smart enough to pass power from solar directly to the AC power output through the inverter and bypass the battery? Or does the power output always come from the battery through the inverter? Seems like if the power generator by the solar is enough to handle the output, it could save battery cycles. I don't know much on the technical side, so this might be a silly question.

PV, the battery and inverter are in parallel on the common DC bus. Loads are picked up first and if there is additional PV available the battery will charge if it is within charging voltages. If loads are greater then PV the battery picks up that amount above it. However if the battery becomes fully charged some controllers will cease production until battery voltage drops to a lower voltage. Some float at a high enough voltage to continue to handle loads but leave the battery essentially fully charged.

In really simple terms, if you have 1000 watts coming in from solar and 1000 watts of load, all the power goes to the load. If you have 200 watts of load with the same 1000 watts of solar, the extra 800 watts go into the battery, but only if the battery needs it. The solar charge controller just sees battery charging and inverter loads as loads. Physics determines where the power goes.

The charge/discharge and conversion processes are not 100% efficient, but that is the basic idea.

Not sure how the Bluettis work but here's how the Delta solar gens work.

Let's say you have the full 500/1000/1600W of solar that a Delta 2/Delta 2 Max / Delta Pro can handle. No AC input connected. On my D2M it will discharge to 98% then enable the solar inputs and charge at 1000W, then tail off once battery hits 100%.

Brucey said:

Not sure how the Bluettis work but here's how the Delta solar gens work.

Let's say you have the full 500/1000/1600W of solar that a Delta 2/Delta 2 Max / Delta Pro can handle. No AC input connected. On my D2M it will discharge to 98% then enable the solar inputs and charge at 1000W, then tail off once battery hits 100%.

Click to expand...

Bluetti are essentially same. It would be nice if they throttled the solar to match output load once full, vs cycle the MPPT on and off.

Great info, thanks all. Are there any resources online or YouTube that break this down more? I'm looking for mid-range knowledge and understanding.

Is there a solar generator that has an inverter (charge controllers?) smart enough to pass power from solar directly to the AC power output through the inverter and bypass the battery?

Click to expand...

I am not aware of any solar generator that does this. I would like to find one that does myself, because once the batteries on a solar generator reaches 100%, the charge controller shuts off and all the power generated by the panels is wasted. As stated above, the charge controller turns on when the battery dips to 98%. An All In One inverter would be your best bet.