“Not enough, but your math is likely not correct. The V and I do not jive with the 460W, so you're likely using Voc and Isc.
- old dude who hasn't seen the new panels on the market...
Use Voc only to calculate the max system voltage. 5x50.8 cannot be greater than the lower system voltage of either the PV or controller, not just the controller.
- "...greater than the lower system voltage of either the VP or controller, not just the controller" makes no sense
In operation, the voltage will be closer to 5xVmp and 2xImp.
- this is pretty much true... but why even bring Vmp and Imp into the conversation except to make a point about how panel manufactures rate the wattage of their panels.
Similarly, 450V x 100A is 45kW, nine times the 5kW rating. The V and I are not operational numbers. If the controller is rated at 100Amps, it implies that its lower input voltage limit is around 50V.”
- all of this confusion because you left out the 6,000 watt max array factor. hmmm
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- The 5kW rating on the GroWatt is not how much solar you can put into it... It is how much AC wattage you can get out of the inverter for your loads. I am assuming you are looking at 2 inverters cuz each inverter can only take on a maximum of 6,000 watts of solar and you got 9,000 watts of solar and not because you have that heavy of loads.
- reading the spec sheet for the 5kw GroWatt inverter you are correct that it can take a max of 450Voc and a max of 100amps of solar input which you may think to just multiply those to get 45,000 watts, but the spec sheet specifically says the max solar array wattage supported is 6,000 watts.
- assuming you will tie one 5S-2P array (4,500 watts) to one inverter and the other 5S-2P array (4,500 watts) to the other inverter. This would put you well within the specs of the inverters for solar input, and give you 10kW of rated AC output with buffer above that for surge needs.
- 5 in series sets your array Voc at 254v, well under the max of 450v
- 2 in parallel sets your array Isc at ~22amps, again well under the max of 100a and you can get away with 8awg cables from the arrays to the inverters.
- So you are installing 9,000 watts of solar that will likely produce around 40kWh per day on good days.
(my rule of thumb is total array wattage x 4.5 to give you likely daily watt hours)