You must be in my region. Craiglist has thousands of those same q cells at the same cost near Greenville.It’s a 12000 watt inverter. It says it can handle about 7000 watts of panels. I have 32 lifepo4 280ah cells on the way and no not grid tied. For panels I have 24 335 watt qcells I found online used for $115 each
Yup I saw his add on Facebook but I am north of GreenvilleYou must be in my region. Craiglist has thousands of those same q cells at the same cost near Greenville.
@Jgb3 How's those bms units working out? I'm about to start the exact project for an off grid home.
Biggest issue is the BMS units I wanted to use from overkill solar. I want to use 32 280 cells 16s, each 16s group with its own bms. Then parallel the 2 packs.
But the BMS from overkill are only 100amp x 2 and 48vdc x 200amp = 9600 watts. So I would shut down at 9600w ... Unless I build a 3rd 16s bank with a third bms, which I may do.
Been awhile since I’ve been on here but the Daly bms’s I got sucked one was junk and Daly made me ship it to them and pay for return shipping so they could fix it even though they sent me a junk bms. I’ve purchased a jbd bms 300amp but haven’t had a chance to install it yet@Jgb3 How's those bms units working out? I'm about to start the exact project for an off grid home.
Biggest issue is the BMS units I wanted to use from overkill solar. I want to use 32 280 cells 16s, each 16s group with its own bms. Then parallel the 2 packs.
But the BMS from overkill are only 100amp x 2 and 48vdc x 200amp = 9600 watts. So I would shut down at 9600w ... Unless I build a 3rd 16s bank with a third bms, which I may do.
Well the growatt has 2 inputs so I went with 3s4p x 2 so 24 335 watt panels 8040 watts@Jgb3 what did you end up for an array size and wiring? I was thinking 5s4p of 350w panels for 7000 watts
... Then add a 5th string of 5 more (5s5p) to over panel due to losses and clouds.
Also over paneling is only on the watts side don’t go over on the volts. They have calculators to factor in temperature. I haven’t looked but I’m sure you have to be close or over with that set up you don’t want to have a cold sunny day and fry your controller@Jgb3 what did you end up for an array size and wiring? I was thinking 5s4p of 350w panels for 7000 watts
... Then add a 5th string of 5 more (5s5p) to over panel due to losses and clouds.
Any updates on how you're system is running ?Also over paneling is only on the watts side don’t go over on the volts. They have calculators to factor in temperature. I haven’t looked but I’m sure you have to be close or over with that set up you don’t want to have a cold sunny day and fry your controller
The Growatt 12000T will stand a surge of up to 15KW for starting current. You are confusing input with output. All inverters quote output and surge power.I don't know what to tell you on that, others will be able to help. I am still a bit concerned about only being able to hook 7000 watts to it. I have seen the explanation, but wonder why they call it a 12,000 watt unit?
OverPaneling
This from Signature Solar as an email to me As to OverPaneling the Growatt SPF 12kW DVM MPV 250VDC and how the two PV inputs work for the MPPT SCC (PV1 and PV2).
(Me) Page 10 of the Manual - Indicates There are 2 PV input connections for the 12k version, but there is very little or no explanation of why or how they are used. I assume this has to do with MPPT tracking? Are there MPPT settings in the charge controller section of the control parameters? Not finding much about this or Array arrangement.
These models are essentially 2 6kw units combined into one. Each MPPT controller can handle 7000W from the array and the settings will be determined by total input.
That would be my understanding from that response. But from the larger body of info I have been gathering from multiple discussions on the forum, emails and from midnight solar indicates it really does not seem to matter how big the array is as long as it does not exceed the input VOC of the SCC . The extra will not be dissipated as heat, the SCC just simply will not use it. So it's up to the individual to decide how much Overpaneling waste they want to design inSo from the responses you got, you can in essence run up to 14kW as long as its 7kW per array input ?