MPPT controller recommendations
I purchased four of these 100 watt panels from Home Depot. https://www.homedepot.com/p/Grape-Solar-100-Watt-Polycrystalline-Solar-Panel-for-RV-s-Boats-and-12-Volt-Systems-GS-Star-100W/204211365 I fi...
Forum Discussion
I'd like to know which model Grape controllers you folks are using. That is really good value if there are settings control for voltage.
I have a Morningstar MPPT-15 and the controller interfaces with the Msview software perfectly. I hook up the laptop and can see in real time the harvest and draw of the 12V system, besides the variable set points. It also has temp compensation for the batteries and I've confirmed the accuracy of that. IMO, Morningstar makes good MPPT solar controllers but price is reflected.
I'd also think a 30 amp controller will get the job done. Most MPPT controllers shed any amperage above their maximum threshold. I've seen close to 16 amps with the MPPT-15.
If you're maintaining gel cell batteries, their charging requirements are in a narrow configuration. You'll want a controller with variable set points for the charging current.
I have a Morningstar MPPT-15 and the controller interfaces with the Msview software perfectly. I hook up the laptop and can see in real time the harvest and draw of the 12V system, besides the variable set points. It also has temp compensation for the batteries and I've confirmed the accuracy of that. IMO, Morningstar makes good MPPT solar controllers but price is reflected.
I'd also think a 30 amp controller will get the job done. Most MPPT controllers shed any amperage above their maximum threshold. I've seen close to 16 amps with the MPPT-15.
If you're maintaining gel cell batteries, their charging requirements are in a narrow configuration. You'll want a controller with variable set points for the charging current.
