I'm in the process of setting up my DIY solar panel system and need advice on choosing the right hybrid inverters. I'm aiming to generate around 20,797 kW annually and have 60 sunpower solar panels, each rated at 330 W. The open circuit voltage is 64.8 V. After doing some research, I've chosen to go with a SolarEdge central system instead of the Enphase distributed inverters. My plan is to run strings of panels on an array that holds 48 of these panels. However, I'm worried about the voltage limitations of the inverters I'm considering. For example, the BBL15 inverter has a maximum voltage limit of 550 V, which means I can only string together 8 panels before hitting that limit, resulting in only 2,640 W—far below what I need. Do these inverters typically come with multiple DC inputs so I can achieve the necessary output using parallel strings of panels? I'm still learning, so any help would be greatly appreciated!
2 Answers
It sounds like you’ve got quite the project ahead! A good strategy might be to split your setup into two 10 kW hybrid inverters, each handling 30 panels. Look for inverters that have multiple MPPT inputs, which will give you more flexibility in stringing the panels together. I've also looked into models like the SE11400H-US, which could be a good fit. Just remember that managing the maximum voltage is crucial to avoid damaging your equipment!
Also, don't forget to account for the increase in voltage on colder days—you’ll want to ensure you’re calculating for the worst-case scenario to avoid frying the inverter. Generally, using parallel strings to double your amperage is a solid approach given the higher voltage of your panels. Keep checking the specs of the inverters; if you have enough MPPT inputs and they handle the amp limits, you should be good!
Yeah, definitely. Just be cautious about exceeding the specs on your chosen inverter. Mismatching can lead to serious issues.
Definitely consider looking for inverters that can manage the number of panels you’re using. It really comes down to their input capacity and the number of MPPTs they have.