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Post by Deleted on Feb 25, 2021 14:38:41 GMT
That suggests you are running the panels in series. In parallel, it would be 36.7 volts. Thanks to both you and Nick.
One last question just so I'm sure - is what I suggested correct for panels in series. (it might seem a bit pedantic but I can do the calculations knowing that is right). And the OCv important thing to consider.
Panels in series=voltage + voltage. panels in parallel=amps + amps. The panels you are looking at will be perfectly suited to wire in parallel, thus allowing you to use your present mppt.
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Post by JohnV on Feb 25, 2021 14:44:30 GMT
That suggests you are running the panels in series. In parallel, it would be 36.7 volts. Thanks to both you and Nick.
One last question just so I'm sure - is what I suggested correct for panels in series. (it might seem a bit pedantic but I can do the calculations knowing that is right). And the OCv important thing to consider.
the other way is to add a panel, giving you 4 panels, running series parallel (2 panels in series x 2 then parallel the outputs of the two chains, that would give you o/c volts = to 2x 36.7 V ....73.4 Volts well within the controllers parameters
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Post by Deleted on Feb 25, 2021 14:46:55 GMT
Thanks to both you and Nick.
One last question just so I'm sure - is what I suggested correct for panels in series. (it might seem a bit pedantic but I can do the calculations knowing that is right). And the OCv important thing to consider.
Panels in series=voltage + voltage. panels in parallel=amps + amps. The panels you are looking at will be perfectly suited to wire in parallel, thus allowing you to use your present mppt. So (provided they were wired in parallel) I don't need to worry about if I used those panels 3 x 270 watts = 810 watts which is above the manual guidelines of 780 watts?
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Post by Deleted on Feb 25, 2021 14:47:55 GMT
Panels in series=voltage + voltage. panels in parallel=amps + amps. The panels you are looking at will be perfectly suited to wire in parallel, thus allowing you to use your present mppt. So (provided they were wired in parallel) I don't need to worry about if I used those panels 3 x 270 watts = 810 watts which is above the manual guidelines of 780 watts? Correct.
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Post by Deleted on Feb 25, 2021 14:51:37 GMT
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Post by patty on Feb 25, 2021 15:59:36 GMT
I doubt myself - Grade E at Physics... didn't take physics ..all i managed was CSE grade 2 Chemistry... Didn't do biology either..my choice of nursing as a career saw a real baptism of fire when I(and my tutor) realised I'd got a lotta work to catch up on
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Post by bodger on Feb 25, 2021 16:11:14 GMT
Panels in series=voltage + voltage. panels in parallel=amps + amps. The panels you are looking at will be perfectly suited to wire in parallel, thus allowing you to use your present mppt. So (provided they were wired in parallel) I don't need to worry about if I used those panels 3 x 270 watts = 810 watts which is above the manual guidelines of 780 watts? do you really believe you will ever get 100% of the theoretical maximum output from your panels?
do you intend to take your boat to Nevada or Abu Dhabi?
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Post by Deleted on Feb 25, 2021 16:12:41 GMT
So (provided they were wired in parallel) I don't need to worry about if I used those panels 3 x 270 watts = 810 watts which is above the manual guidelines of 780 watts? do you really believe you will ever get 100% of the theoretical maximum output from your panels?
do you intend to take your boat to Nevada or Abu Dhabi?
Yes
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