Looking for some practical advice on my water supply system at our off grid cabin.
Set-Up:
240 VAC, 1/2 HP Deep Well pump sitting on a saddle about 50' out from the cabin and sitting on the bottom of the lake. The pump has a contactor box mounted on the wall inside the cabin. When the pump cuts in, one can hear the contactor (Start Relay) click on. Pump intake screen is clean.
Power:
Cabin is powered by two LV6548 HF Inverters wired in parallel to provide 120/240VAC. Battery bank is comprised of 5, SOK 100ah (SK48V100) batteries.
Issue:
About 80% of the time, when the pump kicks in, the pump contactor snaps on, then off, then on again and remains on until the pump reaches the cut-out pressure. If you didn't hear the contactor doing a double click, one would never know there was a problem with the system.
My questions is this...
Has anyone else run into this problem? As each inverter is rated for 6500W and the pump is only 1/2HP, I can't imagine the inrush current at start being too large for the LV5648's. I realize that LF inverters are better at starting inductive than the HF LV6548 but I have to think that I've oversized the HF inverters enough to easily handle the load.
My thinking is that if no one else has experienced this issue, I may have a bad contactor and will need to replace it or clean it. Just trying to gather information on my way to diagnosing the problem and coming up with a solution.
Thank you in advance for all that take the time to reply.
Set-Up:
240 VAC, 1/2 HP Deep Well pump sitting on a saddle about 50' out from the cabin and sitting on the bottom of the lake. The pump has a contactor box mounted on the wall inside the cabin. When the pump cuts in, one can hear the contactor (Start Relay) click on. Pump intake screen is clean.
Power:
Cabin is powered by two LV6548 HF Inverters wired in parallel to provide 120/240VAC. Battery bank is comprised of 5, SOK 100ah (SK48V100) batteries.
Issue:
About 80% of the time, when the pump kicks in, the pump contactor snaps on, then off, then on again and remains on until the pump reaches the cut-out pressure. If you didn't hear the contactor doing a double click, one would never know there was a problem with the system.
My questions is this...
Has anyone else run into this problem? As each inverter is rated for 6500W and the pump is only 1/2HP, I can't imagine the inrush current at start being too large for the LV5648's. I realize that LF inverters are better at starting inductive than the HF LV6548 but I have to think that I've oversized the HF inverters enough to easily handle the load.
My thinking is that if no one else has experienced this issue, I may have a bad contactor and will need to replace it or clean it. Just trying to gather information on my way to diagnosing the problem and coming up with a solution.
Thank you in advance for all that take the time to reply.