Snowynorth
New Member
- Joined
- Jan 10, 2022
- Messages
- 177
Is there an upper limit to over paneling, watts, and amps?
I can buy 455 watt Longi, or 425 watt q cells, both 1/2 cut bifacial perc, at a reasonable price. The longi are less money. I'm going to install 12 panels for now 2s1p into one mppt on Deye7.6k. I only have 2 wire from the panels to inverter in the ground right now. Then expand next year with more home run wire, and another 12 to 18 panels, once I'm ready to tie in a shop, and 2 small kids/guest cabins. The scc on longi 455 is 11.65 x 2 =23.30a into 18a mppt. The q cell 10.78 x 2 =21.56a. Either way I'm over on watts and amps using 12, and under using 10. I think I'm good on volts with our cold winters. PV inpit voltage 100-500. (MPPT range is 125 to 425v. I'm assuming that's 125-425 per mppt) am I wrong? The PV input volatage and the MPPT range voltage have me confused somewhat. If 12 panels work, it boosts my voltage, and hopefully faster battery charging. I'm off grid.
I can buy 455 watt Longi, or 425 watt q cells, both 1/2 cut bifacial perc, at a reasonable price. The longi are less money. I'm going to install 12 panels for now 2s1p into one mppt on Deye7.6k. I only have 2 wire from the panels to inverter in the ground right now. Then expand next year with more home run wire, and another 12 to 18 panels, once I'm ready to tie in a shop, and 2 small kids/guest cabins. The scc on longi 455 is 11.65 x 2 =23.30a into 18a mppt. The q cell 10.78 x 2 =21.56a. Either way I'm over on watts and amps using 12, and under using 10. I think I'm good on volts with our cold winters. PV inpit voltage 100-500. (MPPT range is 125 to 425v. I'm assuming that's 125-425 per mppt) am I wrong? The PV input volatage and the MPPT range voltage have me confused somewhat. If 12 panels work, it boosts my voltage, and hopefully faster battery charging. I'm off grid.