Going to try to keep this brief.

Moving into a new house that has a growatt and 2x pylontech 3kwh batteries. no solar.

Having just did a full 5kw solar setup at my current home with luxpower sna5000, svolt 5wh rack mount battery and 8x 450w panels, I'm comfortable with the lux kit, and I'll probably go with that at the new place as well as pricing and value has won me over. I'll probably go for either :

a. 2x lux sna5000, 2x 5wh batteries ( prob svolt or China), and 12x550w panels
or
b. 1x lun sna6000, 1x10kwh hina, and 12x550w panels.

 

any other option I am foregoing? Should I keep the growatt and pylontech kit and just add panels at the new place? I might have a buyer for it, but if it makes more sense then I'll keep it and add panels then.

 

Aim is to keep spend down, on both new setup and electricity bill going forward. currently I use barely 2kwh of eskom per day which is awesome ( geyser is solar, cooking is gas). but also not to have to spend more to redo things etc. do it sufficiently once.

 

What are you opinions guys?

Personal 2c. Consider at own risk, all to be checked.

1.  Will you have a solar geyser and gas hob also in the new home? Will you have more rooms, a pool, growing kids, aircon or anything that will cause you to outgrow your current needs for a 5kW inverter with 3.6kW of panels? If so, get a good grasp on the new usage first, and buy up if needs be with your preferred size system.

2. Which way is the roof pointing? All North? Will one MPPT be okay? Or will dual-MPPT be better?

3. Which Growatt inverter have you got? The SPF500? To be double-checked, but I don't think 12x550W panels are the best choice for that MPPT. You might need panels that operate at a higher current, say 16-17A like the Canadian Solar 600W.

4. If you can get by with a 5kW inverter, if roof is directed North, I'd keep the Growatt, make sure to select appropriate panels, and add one more 3kWh Pylontech battery.

Edited May 7, 20242 yr by GreenFields

That's gold right there GF. thanks a ton.

I thought about it and spoke to some other guys as well.

Batteries:
Seems like they all say to keep the pylon-tech batteries, so perhaps I'll start there. and yes look to add another one perhaps soon. i didn't know they are 3.5kwh so x 2 = 7 should be okay for now. 

Inverter:
I'm pretty sure I can manage a 5kw inverter. But that's just it. manage. 2x would be better though.
and then yes there is the consideration of it being a new house with new consumption. its got an electric geyser, thank God its gas cooking. but the geyser alone needs special planning i.e. add panels just for that and smart timer atleast.

Panels:
I read up on the growatt 500 es pro inverter and its mppt rating. its only got one 6000w max, 18A, 430v, so yes I'd have to go for a slightly higher amp panel albeit fewer for now. methinks 6-8x 550/600w panels. i think this has to happen regardless. then if I do outgrow etc, that string I can re-use in my next upgrade. all facing north I can do. there is some space north west as well for planning next.

seems like also setting up the growatt will be a learning curve. I'll pick up some names and numbers off this forum as well to help me as well. you guys are great!

Thanks.