June 23, 20232 yr Hi guys. Please assist me how to string 6× 450w pannels for a 48v system to a 5kw Mecer Charger inverter to 12v 200ah × 4 batteries . I do not have a charge controller , will it be an issue or have any effect to my system since the inverter has a charger? Please let me know if the pannels should be in parallel or series
June 23, 20232 yr This inverter has a 450V solar charger built in. You can connect your 6 panels in series, that will have up to 50.1V across each panel, and up to 300.6V across the entire string of panels, onto the inverter's solar charger input. That should be fine. On the battery side, you have 4x12V batteries, so on this inverter with a 48V DC input, you also have to mount your 4 batteries in series. Just bear in mind that if you constantly draw the maximum 5kW during loadshedding, you need to consider the impact that this approx 100A discharge would have on the cycle life and available energy stored (check the battery manual).
June 23, 20232 yr Author Ok thanks very much Greenfields. So according to what you have stated my 50.1V pannels should not exceed 9 in total not exceed the 450V solar charger ? Am i right? On the energy consumption point its for a small home.. A fridge 700w , 10 LED lights 100w, entertainment tv decorder 400w and just laptops and phone charging .
June 23, 20232 yr 53 minutes ago, Geoffrey Bandason said: Ok thanks very much Greenfields. So according to what you have stated my 50.1V pannels should not exceed 9 in total not exceed the 450V solar charger ? Am i right? On the energy consumption point its for a small home.. A fridge 700w , 10 LED lights 100w, entertainment tv decorder 400w and just laptops and phone charging . 8 will be a safer bet with some headroom. 9 will exceed 450V at temps lower than 25 degrees. This is in line with the suggestion by GreenFields.
June 23, 20232 yr 52 minutes ago, Geoffrey Bandason said: Ok thanks very much Greenfields. So according to what you have stated my 50.1V pannels should not exceed 9 in total not exceed the 450V solar charger ? Am i right? That's not a good idea, you still need a margin of safety because Voltage changes with temperature. At most 8 of those panels. If you want to get closer to the maximum PV installed, you have to consider a different panel, either something with a higher amp output, otherwise you could take panels with lower amps and put them in parallel.
June 23, 20232 yr Author 5 minutes ago, GreenFields said: That's not a good idea, you still need a margin of safety because Voltage changes with temperature. At most 8 of those panels. If you want to get closer to the maximum PV installed, you have to consider a different panel, either something with a higher amp output, otherwise you could take panels with lower amps and put them in parallel. Noted . Much appreciated..
June 23, 20232 yr Author 53 minutes ago, Scorp007 said: 8 will be a safer bet with some headroom. 9 will exceed 450V at temps lower than 25 degrees. This is in line with the suggestion by GreenFields. Thanx very much Scorp007🫡
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