diy solar

diy solar

First build - panel recommendation for Dallas area?

tombo06

New Member
Joined
Aug 8, 2022
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I am building a 48v off grid system like Will’s 240v MPP example, except I plan on using 2 EG4 3000 EHV’s. My goal is to charge my Tesla at 6Kw (240v, 25A), plus I want to be able to charge 120v loads also. I think I could make this simpler by just buying the Growatt SPF 6000T or MPP LV6048, but I think I want to go all EG4. This will be a ground mount system in my back yard, so I am limited by the number of panels I can mount, plus they will be facing west or southwest (< 2kw). I plan on buying everything from Signature Solar, since I am an hour away from them. So if I use the two EG4 3000 EHVs, can I wire a panel to provide 240v and 120v at the same time? Is there a detailed resource that shows how to do this? Also, can anyone recommend the panels from Signature? They don’t have Rene Sola anymore, so I am looking at Suntech or Aionrise 330 watt panels, since I need something that will fit in an SUV.
 
This is not very realistic! 6kW of output is going to require at least 12kW of panels feeding it, not 2kW. I think the proper way to do this is with a split-phase 120/240V inverter, maybe a 12kW SolarArk. The SolarArk, being split-phase, will be able to feed both 120 and 240V loads at the same time.

If this is going to be a fixed ground mount, don't expect to actually attain 6kW of power for more than 2-3 hours per day with a 12kW array. With only 2kW of panels, don't expect to make more the level 1 charging (1440W) for more than 2 hours per day. Draining one battery to charge another battery is also a losing game in most cases.

In my own case, I have 4500W on rotating mounts, and I think I could supply 10A at 240V from maybe 9am till 3pm.
 
Thanks for the reply. I can only fit in my space about 6 panels, so I want to see how much I can capture with say 6 330 watt panels. What ever I get I want to see if I can use that for my EV or 120 v loads. I think what I need to do is get some panels and an MPPT and a battery or two, and see how many Kwh I can get in a typical week. I'll look into the SolarArks.
 
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