Grape Solar 40A PWM controller
Hi all,
Decided it's time to get into solar! Got a Grape Solar 40A PWM controller and a single 100W panel for starters. My batteries are 2 Trojan T105s.
Have some questions about setting up the controller. It doesn't come with a user manual, just a little one page leaflet with some basic info. There is also an app that you can use to set it up, but I can't find any documentation on how to use the app.
I took these screen shots of the app:
Here's the charging profile I've been using (recommended by Trojan):
There are quite a few fields in the app that I'm not sure what they mean or what to plug in. For example:
Boost Char Return Volt
Over Disc Reture Volt
Temperature Compensation
Also, not totally sure what to plug into some of the other fields to get the desired profile. For example, I've been doing manual absorption charging using a Drok buck booster. I charge at a fixed 14.8V until charge amperage drops to a constant value (usually about 2.5A). Then raise it to 16.2V for a finish voltage at a constant amperage and shut it off when the voltage stops rising.
I have no idea how to set up the Grape to achieve a similar profile. The app doesn't even have any mention of absorption charging.
I know there are at least a few here that are using this controller. I'd love to hear how you set it up and how it's working out for you.
Decided it's time to get into solar! Got a Grape Solar 40A PWM controller and a single 100W panel for starters. My batteries are 2 Trojan T105s.
Have some questions about setting up the controller. It doesn't come with a user manual, just a little one page leaflet with some basic info. There is also an app that you can use to set it up, but I can't find any documentation on how to use the app.
I took these screen shots of the app:
Here's the charging profile I've been using (recommended by Trojan):
There are quite a few fields in the app that I'm not sure what they mean or what to plug in. For example:
Boost Char Return Volt
Over Disc Reture Volt
Temperature Compensation
Also, not totally sure what to plug into some of the other fields to get the desired profile. For example, I've been doing manual absorption charging using a Drok buck booster. I charge at a fixed 14.8V until charge amperage drops to a constant value (usually about 2.5A). Then raise it to 16.2V for a finish voltage at a constant amperage and shut it off when the voltage stops rising.
I have no idea how to set up the Grape to achieve a similar profile. The app doesn't even have any mention of absorption charging.
I know there are at least a few here that are using this controller. I'd love to hear how you set it up and how it's working out for you.
