I have ordered an Apex300 B300k (I already have 2 x B300) and want to integrate this to my existing solar system in Canada.
I currently have a 10kW SolarEdge grid tie inverter, that is connected into my home panel. The problem is that this is a grid tie inverter, so when the grid is out, the inverter send a signal to the optimizers and they shut off, causing solar production to stop (just when it is needed the most).
Is there a way to integrate the Apex300 system with a grid tie inverter, so in the event of the grid outage, I disconnect the house from the grid, then power the house with the Apex300 in a way such the SolarEdge grid tie inverter would reactivate and allow solar to power the system? The switch over doesn’t need to be automated. But I do want the 10kW Solaredge inverter to continue working and power the house / charge the Bluetti battery.
@snowstorm
Hi Matthew,
After confirmation from the tech team:
When the grid power is out, the Apex 300 will take over to supply power to the load, but the solar inverter will not continue to provide power or charge BLUETTI machine unless the solar panels are directly connected to the Apex 300.
R&D team Update:
In an off-grid situation, adding AT1 to SolarEdge and Apex300 can enable this charging function. However, the AT1 connection requires HUD A1 (one machine also needs HUB A1 connected to AT1) so that the AT1 startup function can enable the photovoltaic inverter to charge APEX300 in an off-grid situation. But honestly, this is not a cost-effective solution.
Can you tell me more about the capability of the AT1?
Is it possible to AC couple the Solaredge (SE) inverter to Apex300? For this to happen, 2 things need to be true:
- The Apex300 would need to provide a high quality AC waveform that the SE inverter believe is a true grid thus will then activate. There are grid forming inverters that would do that, but no sure if Apex300 AC output is of hig quality enough to provide AC power in a very tight spec.
- The Apex300 needs to accept attempts by the inverter to export power, and when it cannot (battery full) tell the SE inverter to shut down. On most inverters doing this, they would sink the charge into battery even if there is no load, and if there is too much power, or the batteries are full, it would shift the frequency on the AC output to throttle or shut down the inverter. Does the AT1 and Apex300 do that?
- It will adjust the power and turn off the relay to stop charging when fully charged and under no load; when fully charged with a load, it will bypass the load.
- The laboratory only tested the Enphase inverter, not the SolarEdge; therefore, it can only be said to be theoretically feasible.
Below is the user manual for the AT1 for your reference.
AT1 User Manual-compressed.pdf (4.5 MB)
Thanks for the instruction manual. This is very useful.
If it works as intended, the AT1 is a very promising device that allows Bluetti system to function as whole home integrated backup. Good work!
You mention this requires the A1 hub to work, does it requires dual Apex300? Or can it work with only a single Apex300?
My question here is with the existing PV integration using AC coupling. What Enphase inverter model was this tested with? How does this device signal the PV inverter to throttle down or shut down export of power? What standard does it used to signal the inverter? Want to know whether it would work with an SolarEdge grid tie inverter (SE10000H-US)
You guys should partner with local solar installer firms to get them to distribute and install your systems.
The Apex300 standalone unit works with the Hub A1.
Here’s the Enphase inverter for your reference.
Thanks for the suggestion. I’ll pass it on to my colleagues in the B-end marketing department. 
