I've installed a big solar setup with 47 panels designed to stay within the current limits of my EG4 18kpv inverter. However, I'm really struggling with the solar output during the winter months here in upstate New York—I'm only getting about 9 kWh per day, which is way below my target of 30 kWh to avoid relying on a generator. I'm wondering if there's a way to use a micro inverter that limits the panels' output when they're not needed, or if I need to invest in another large inverter to boost my output. Any insights?
3 Answers
You can actually use a different MPPT to charge your batteries, as long as you stay within their charge rate. With the EG4 setup, consider getting a smart solar MPPT like the Victron 450/200, which allows up to about 30% over-paneling. This means you could potentially add more panels without exceeding the limits. Just make sure to check with Victron for specifics, as they provide good guidance on these setups.
It's not unusual to 'over-panel' your system slightly, especially given the harsh winter conditions you're dealing with. As long as you don’t exceed the inverter’s maximum voltage, you can usually add more panels. You might also want to think about adjusting the tilt of your panels for better winter sunlight capture. Adding another charge controller is also a smart move since you can manage your system better during peak times.
Just a heads-up—if you’re planning to add more panels, make sure to know your current inverter's specs. The EG4 manuals typically specify a max short circuit current, and exceeding that could cause issues. So adding more panels is doable, but keep an eye on the ratings!