TheFutureIsSolar
New Member
Which solar charge controller(s) is going to be the best for wiring multiple panels to 48v bank?
40 Panels
- Thread starter TheFutureIsSolar
- Start date
Brucey
Solar Wizard
Need to know the specs of the panels (max voltage and amps).
DougfromdaUP
Solar Enthusiast
Knowing the distance to the arrays is valuable, too.
TheFutureIsSolar
New Member
Voc is 47.7
Ioc is 18.8
The array is about 500ft away
Ioc is 18.8
The array is about 500ft away
DougfromdaUP
Solar Enthusiast
At 500 feet you'll want to run a cc that will take a high voltage (500v or more) so you can keep the voltage drop (losses) down in the wires connecting the array and cc.
Bluedog225
Texas
- Joined
- Nov 18, 2019
- Messages
- 2,974
Give some thought to placement of the array. You may have more options than you think. The “middle” 5-8 hours of sun are most productive. Getting closer has advantages.
More detail on your location and plans would help.
More detail on your location and plans would help.
TheFutureIsSolar
New Member
I’m in southern Texas, probably not to far from you haha.
Bluedog225
Texas
- Joined
- Nov 18, 2019
- Messages
- 2,974
Howdy neighbor.
Then lots of sun and flat. Why 500’?
Then lots of sun and flat. Why 500’?
hwy17
Anti-Solar Enthusiast
18A?
Do you have a certain inverter you want the charge controller to communicate with at all?
TheFutureIsSolar
New Member
Plans to expand.
Im just curious if there are higher voltage charge controllers on the market without all of the extras
Solar Guppy
Red Cobra Guppy
Morningstar and Schneider are the choices for stand-a-lone high voltage charge controllers ( 600V )
TheFutureIsSolar
New Member
What about the EG4 MPPT100-48HV?
SignatureSolarJames
Try Solar, the Grid will always take you back
it is a lot cheaper, 500v instead of 600v though.
it is the newest entrant but between it and the 3kw eg4 inverter version of it we have over 3000 units in the field this year
Zwy
Emperor Of Solar
I have a pair, my array is 420 feet away and the EG4 units work great after updating the firmware. I've been running one since July, the other since August.
Be aware these will not communicate with the rest of your system, only EG4 batteries. Not a big deal unless you want to obtain and store data from PV.
40 panels would require 5 units. You can run 8S per MPPT. These are single PV input. Are you certain you gave the right specs because it doesn't make sense? 47.7V x 18A would certainly be some large panels. If instead you have 47.7V x 9A= 430W
Be aware the EG4 unit is rated at 5500W. I do not recommend over paneling these units. I've seen mine pull 4.3Kw all day from 4.2Kw of panels and 5.1Kw with cloud edge effect.
TheFutureIsSolar
New Member
Brucey
Solar Wizard
Zwy
Emperor Of Solar
700W bifacial panel, that is some serious panel. 40 panels- 28Kw. You plan on powering a small city? 
Probably end up with 7S per string so it would take 6 of the EG4 MPPT's. You might sneak by with 8S which is 5600W but you would probably lose most of the bifacial gain plus these only output 100A so that limits what you can put in. Might see some clipping at 7S on the bifacial gain but should work.
Here is another thread with the same panels. https://diysolarforum.com/threads/isc-on-deye-6kw-with-bluesun-700w.55715/
Probably end up with 7S per string so it would take 6 of the EG4 MPPT's. You might sneak by with 8S which is 5600W but you would probably lose most of the bifacial gain plus these only output 100A so that limits what you can put in. Might see some clipping at 7S on the bifacial gain but should work.
Here is another thread with the same panels. https://diysolarforum.com/threads/isc-on-deye-6kw-with-bluesun-700w.55715/
TheFutureIsSolar
New Member
Haha.700W bifacial panel, that is some serious panel. 40 panels- 28Kw. You plan on powering a small city?
Probably end up with 7S per string so it would take 6 of the EG4 MPPT's. You might sneak by with 8S which is 5600W but you would probably lose most of the bifacial gain plus these only output 100A so that limits what you can put in. Might see some clipping at 7S on the bifacial gain but should work.
Here is another thread with the same panels. https://diysolarforum.com/threads/isc-on-deye-6kw-with-bluesun-700w.55715/
I guess the EG4 MPPT are going to be the most practical option.
Thanks for all the info.
Zwy
Emperor Of Solar
I run the pair and very impressed. These do make some noise due to the fans. Mine are in my basement below the bathroom and I can hear the fans singing at peak sun if I listen for them.
For the price point and specs, these are certainly one of the best options out there.
