Don't get me wrong, the Victron systems are nice & I envy their great traits I've praised in sibling comments. But your system doesn't compare on the power spec

Don't get me wrong, the Victron systems are nice & I envy their great traits I've praised in sibling comments. But your system doesn't compare on the power specs. There is no exact equivalent for the Deye with Victron. The Deye can do 15.6kWp solar, split over 2 MPPT. The topology is such that one MPPT can do 15kW while the other does 0W (I did not believe this, but I've talked to the manufacturer and it's indeed correct). The inverter can output 12kW AC, or draw that much for charging the battery. If your load is not balanced well, there is a video of someone testing it with 12kW sustained output on a single phase (this is only useful for a select few maniacs though; I'm not one of these). And if the 12kW is not enough, you can put them in parallel (like with Victron). I deleted my notes on the Victron setup, but this is something similar to what I was looking at (about Sept 2022): 3x Multiplus 48/5000 on the AC/DC end for full three phase setup (back then 1700€ each, now 1300€) - mind those can really "only" push 5000VA or 4000W at 25degC. Our roof would be 1x MPPT RS 450/200 (pretty stable at 1800€), the string in the garden 1x 450/100 (1200€ in Sept, 1000€ now). A RPi plus USB adapters and PSU and sturdy case for VenusOS (or a GX unit) would be close to 100€ extra, also add additional cables and the necessary busbars (dunno, 200€?). For a three phase that's 7000€ today, or 8400€ in September. Of course that's just one way of building a system, and Victron is amazingly flexible - and with my 14kWh battery two multiplus would probably have been enough (caveat emptor: no idea if my grid operator would have accepted 2x5kVA or rejected it due to the inbalance). Lots of people use a SmartShunt or Lynx, these also add to the costs of a Victron system. Why zoo: The footprint of the Victron 3x MP and 2x MPPTs is nearly 0.9m²; add busbars and other periphals, and you're easily at 1m². Plus, each device needs some clearance due to the heat. The Deye is one unit with 0.3m² footprint. This is also nice.