TinyHouseSolar
New Member
- Joined
- Jun 26, 2021
- Messages
- 17
I’m trying to configure my LV6548 for a use case that I’m not finding the correct settings for.
I have an MPPsolar Lv6548 that is connected to two BigBattery Hawk 170ah 24v batteries in series. About 1500watts of panels on PV1. AC input is a circuit that has a long run and thus voltage drop is an issue. As such, I have limited the AC charge current to 2A in the 6548 menu.
However, here is the issue: The 6548 powers loads that often exceed the AC input’s current rating. This is not a problem when the batteries are charged but if I end up running a deficit such as in the winter, I need the batteries to stay somewhat charged by the circuit without going into bypass mode when the batteries get below the back to grid threshold. In other words, I need the ac input to slowly trickle charge the batteries at a low current at all times. If the batteries start getting full from solar or ac input, it can back off the ac input but otherwise I’d like it to be maintaining the batteries somewhere between 40-70% all the time.
Right now if I’m running a deficit and the batteries slowly drain down to their back to grid level, it switches to bypass mode and charges the batteries at the aforementioned 2A but also runs the rest of the load from the ac input as well, which can sometimes exceed 20A, totally running beyond the circuit’s capability. The big batteries have the amperage rating far exceeding my max surge load and together with a 2A trickle charge, I can maintain much greater than a 1.0 total input/output kWh ratio, but I don’t see how to set up the 6548 to do this. Here are my settings. I’ve included everything that seemed pertinent.
Output source priority: solar, battery, utility
Ac input range: appliance
Output voltage: 120v
Output frequency: 60hz
Single machine output
Battery type: user
Battery cut off voltage: 46v
Bulk charging voltage: 58v
Float charging voltage: 58v
Max charging current: 60A
Max battery discharge current: disable
Max ac charging current: 2A
Charging source priority: solar + utility
Back to grid voltage: 48v
Back to discharge voltage: 51v
Bypass function: disable
Thanks in advance for any advice.
I have an MPPsolar Lv6548 that is connected to two BigBattery Hawk 170ah 24v batteries in series. About 1500watts of panels on PV1. AC input is a circuit that has a long run and thus voltage drop is an issue. As such, I have limited the AC charge current to 2A in the 6548 menu.
However, here is the issue: The 6548 powers loads that often exceed the AC input’s current rating. This is not a problem when the batteries are charged but if I end up running a deficit such as in the winter, I need the batteries to stay somewhat charged by the circuit without going into bypass mode when the batteries get below the back to grid threshold. In other words, I need the ac input to slowly trickle charge the batteries at a low current at all times. If the batteries start getting full from solar or ac input, it can back off the ac input but otherwise I’d like it to be maintaining the batteries somewhere between 40-70% all the time.
Right now if I’m running a deficit and the batteries slowly drain down to their back to grid level, it switches to bypass mode and charges the batteries at the aforementioned 2A but also runs the rest of the load from the ac input as well, which can sometimes exceed 20A, totally running beyond the circuit’s capability. The big batteries have the amperage rating far exceeding my max surge load and together with a 2A trickle charge, I can maintain much greater than a 1.0 total input/output kWh ratio, but I don’t see how to set up the 6548 to do this. Here are my settings. I’ve included everything that seemed pertinent.
Output source priority: solar, battery, utility
Ac input range: appliance
Output voltage: 120v
Output frequency: 60hz
Single machine output
Battery type: user
Battery cut off voltage: 46v
Bulk charging voltage: 58v
Float charging voltage: 58v
Max charging current: 60A
Max battery discharge current: disable
Max ac charging current: 2A
Charging source priority: solar + utility
Back to grid voltage: 48v
Back to discharge voltage: 51v
Bypass function: disable
Thanks in advance for any advice.