zanydroid
Solar Wizard
Thanks again.
Regarding optimizers for the hybrid inverters mentioned above (sol ark, luxpower, eg4).
What would be recommended?
What options are there?
Don't get optimizers without a reason to get them.
I haven't heard of fire risks with optimizers beyond that intrinsic to adding more connection points. Optimizers tend to include Rapid Shutdown which is required by code on a roof and is supposed to improve safety for first responders.
There's basically only TIGO and SolArk optimizers. The SolArk optimizer are pretty new, I'm not even sure they're on the market yet. They're more complex than TIGOs in terms of the optimization circuitry & algorithm that they have (they have per-optimizer MPPT and I believe buck/boost (drop and raise voltage), while TIGOs do not have MPPT and are buck only. The buck-only design of TIGO interacts with string MPPT in ways I understand better and expect to be broadly compatible with no risks, though note I'm not a product designer in the industry...)
TIGOs have been around for a while which means plenty of people have installed them and posted threads about them. However there's also posts from folks on the forum like TIGOs interacting poorly with AFCI detection on some inverters.
The fact that SolArk are new, plus are more complex/have voltage boost capability, disincline me to using them. On SolarEdge (which is a proprietary optimizer system, with per panel buck/boost and MPPT) there is some magic that the inverter does to tell the optimizers what voltage to converge to. If I was running a solar installation company, sure I would probably do a test install at my office or house. But I just have the one system I install for myself, and I don't make money playing with random stuff.
Err, actually there's another new one, whose name escapes me, that is in the same functionality class as SolArk (per-panel MPPT, buck/boost). One or two threads about that. Also bleeding edge new, and same issues.