Hi I want to update my solar installation. It is in a boat, alway anchored,so she is moving all the time around the anchor. Weather is always tropical, close to the ecuador
To update it, I though to set 2 solar panel, 450W each one, in series, 900W. Voc= 49.27 and Vmp=41,37 I want to use MPPT 100/50. If I set the panels in series, Voc total is = 98,54v. It will be 2 sets, 2 regulators, 4 panels, and total 1800W. If I use bigger regulators, I should go to 150/60, so I will double the budget, as I will have 2 sets
Please my questions:
1º - PV MPPT 100/50 limit is 100v. Can it be keep it below limit with stated above, keeping in mind that the PV would be always between 15ºC and 60, and I can assume that it will be some lost in 6 cable meters and joins?. And important too, in a boat, with my old installation, I never reached maximums, as the boat is always moving around the anchor, so there is no a optimal and fix orientation towards the sun, and there are some few objects (mast, aerogen, radar), which cast shadows to the PVs?. E.G., in my old I have 500W, but never got more that 340W( 14vx24A), with sun at zenit
2º In the same way, what is the tolerance +/- of the 100v limit for the regulator? Within the manual, there is nothing about it. I meant, if the real limit is 120v, it will be safe I guess.
3º Can I put in paralell the 450w PV increasing AWG cable but lowering the max voltage? I guess in a MPPT would be not suitable do that?
4º Can I set a voltage limitator for 100V just in the inbound of the regulator?. Maybe some kind of varistor.
5º I tried to use the victron excel tool, but I couldn't as per there is some problem if you open it using open office (xlsm format), and I cant use with excel 2003. I tried with opencpn, but it was overflow (value!), when I tried to set parameters, and a new PV , custom. Any idea?
Thanks for your time, BR