I've been going around in circles trying to determine the best way to panel this 24 volt MPP 2400kw All in one. It's a max 2000Watts solar input, Max 145VDC input., Max 80Amps in. My goal is to get the max wattage I can given the space and input limitations. I'm less concerned about additional cost of wiring
I have space for a 8 panels pretty much any sized. While my roof is southern facing I do have some shading at different times of day. With the shading and VDC limitations doing all serial seems to be a non-starter. Would you choose say 4 large 360 watt panels with 42.7 voc and connect them in parallel? (1440 watts) Perhaps 6 200 watt panels with 24.335 voc, connect 3 pairs in serial? This would give me 146.1 Vdc (1200 watts) is that ok to go a little over? Perhaps 2 pairs in serial and then 2 pairs in parallel for a total of 1800 Watts? and 146.1 voc and 57 Amps.
Other points - I've read that temperature can affect Voc so I'm not clear that its a good idea to be anywhere near max.
- Using the large panels solely in parallel I'd need at least 24Volts active on that panel to begin charging (56%) Is that a reasonable expectation given that I expect some shading?
- Using the smaller 200 Watt panels in Parallel - I'd only have just 24 volts Voc so would that mean I'd need 100% of the panel active for it to begin charging the batteries?
- It's unclear to me whether I should be calculating total Voc using the Voc specs of the panel or the Vmp number
Feel free to tell me I'm doing this all wrong
Any help is appreciated
I have space for a 8 panels pretty much any sized. While my roof is southern facing I do have some shading at different times of day. With the shading and VDC limitations doing all serial seems to be a non-starter. Would you choose say 4 large 360 watt panels with 42.7 voc and connect them in parallel? (1440 watts) Perhaps 6 200 watt panels with 24.335 voc, connect 3 pairs in serial? This would give me 146.1 Vdc (1200 watts) is that ok to go a little over? Perhaps 2 pairs in serial and then 2 pairs in parallel for a total of 1800 Watts? and 146.1 voc and 57 Amps.
Other points - I've read that temperature can affect Voc so I'm not clear that its a good idea to be anywhere near max.
- Using the large panels solely in parallel I'd need at least 24Volts active on that panel to begin charging (56%) Is that a reasonable expectation given that I expect some shading?
- Using the smaller 200 Watt panels in Parallel - I'd only have just 24 volts Voc so would that mean I'd need 100% of the panel active for it to begin charging the batteries?
- It's unclear to me whether I should be calculating total Voc using the Voc specs of the panel or the Vmp number
Feel free to tell me I'm doing this all wrong
Any help is appreciated
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