Well,
It happened, my panels are finally up. Cost?, 15k ($300) found these guys on Facebook marketplace and were ready for me the day after my plane landed. 800ah of lfp are reaching float by 10am after a night of 1 1/2 window units running,(1/2 unit being set at 28 for the inverter room) electric fans, fridge, water cooler. Anything that can be is inverter tech. 8kw PJ as OZ surely pointed out doesn’t like putting out over 3.5kw for long, beep beep flat line. I’m trying to teach energy management here like don’t use the electric rice cooker when you have lpg. Don’t use the on demand shower heater after 4pm, preaching to the choir? I had to jumper out a 110v line at the kitchen for the coffee pot so a remote to turn off the PJ just to use it. There is actually a grounded neutral line from the pole but not sure what might happen if I actually grounded the PJ and plugged in the pot to the jumpered 110v. Not testing that one.
The first night I tried to run 2 1/2 window units, batteries died about 5 am and the ats kicked in and the PJ squealed. Housemaid sleeps in there and came out screaming like a banshee. By my calculations there should have been enough reserve. Today I did some checking in my chargers and float refloat absorb charge battery ah charge rate refloat low etc weren’t even close to correct. Both banks actually reach float levels now. Running 108v in from 18 panels 300w each 72 cells 36v. By 9:30am frontside group of 8 are giving out 121v 1.15kw and not much from the rear. By 11am both sets are cranking around 110v 1.5kw 111v .75kw amps are ranging in the 30’s most of the day. All that current and these lfp’s are cold to the touch. Purchased on Alibaba.com for a whopping $115 each and $870 shipped.
My bms system current sensors show average 16a per bank charge throughout the day. As the sun fades it jumps all over the place between 6 and 23a per bank. Each block consistent 3.303v and impedance 1.5meg. 32 lfp’s, 4 banks, 8 blocks each. Can’t get a live data bank voltage ever but history is there. I sat on this thing until the warranty was expired so there’s no returns. It acts flaky but I’m told it needs further configuration. The software is in Chinese and the instructions in englishese. Can’t configure if I can’t read it! Getting the right disk is like pulling teeth.
Pictures to follow.
Ps. Keep you eyes on your torch!