Solar Back-Up power project - Page 4

Xringer · 02-07-21, 06:19 PM

I was wondering about my PWM charger and found this paper..
https://www.morningstarcorp.com/wp-c....-Why-PWM1.pdf

It seems like I should have been 'periodically' putting a load on the system. Eat up some Ah at night, and let it charge up the next morning. That might keep the cells in tip-top shape. If I buy the same old lead-acid batts..

Looking at this 48v pack. https://bigbattery.com/products/48v-...on-power-pack/
It might be chargeable with the TS-45 if I turn off the PWM and tweak the charge & float voltages.

Xringer · 04-06-21, 10:02 PM

After testing the old 48v pack, I found the old 12v Duralast batts might still be pretty good. The cheap HF tester showed 400 to 550 Cold Cranking Amps. These are rated at 800 CCA new. So, I plan to keep them for a while longer, in case the new 48v pack fails.

This 48v pack is a new release "Generation 2" that's packing 80 Ah.
"KIT 48V BDGR - NMC - 80AH - 3.9KWH"
https://bigbattery.com/products/48v-bdgr-kit-of-2/

Should be here tomorrow. I hope to get it installed and tested this weekend.
Tonight I removed the LA batteries without any back injury..
The old Solar controller is now programmed to charge at 50.4 volts.

I have a new 2000W SineWave inverter to replace the old 2500W MSW unit.
Here's a video: https://youtu.be/bNh9g0tZIns
I will keep the old one for a back-up incase the new Sinewave unit fails.

The old Morningstar - Tristar 45A Solar charge controller has been working
so well, I'm buying a spare with my free money check. https://www.amazon.com/gp/product/B0012DNFT2

Anyways, I hope to run part of my home on the back-up system on the weekends. When I'm home all day and leave my PC on much of 48 hours. It will also be running my Wifi router and the FiOs box in basement and the small freezer down there.
During sunny summer weekends, three 200w panels will be bringing in up to 600W. So, I'll want to be using more than that, to cycle the new 48v pack..

Maybe the new inverter will be able to run the Santa Fe dehumidifier.?.
It runs at about 600 watts, but I think the start-up is going to be pretty high.
I could run it with the blower fan ON all the time. So it's start-up wouldn't be added in with the compressor start load.

Xringer · 04-16-21, 07:12 AM

The rains have started. The sun is only been out a couple of days this past week.
Flooding season is here. But, I've got 5.85 kWh of NMC Li-Ion fully charged.

Untested, because we didn't have time.

02-07-21, 06:19 PM	#31
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,897 Thanks: 111 Thanked 248 Times in 228 Posts	48V 1.6kWh Li-ion Power Pack?? I was wondering about my PWM charger and found this paper.. https://www.morningstarcorp.com/wp-c....-Why-PWM1.pdf It seems like I should have been 'periodically' putting a load on the system. Eat up some Ah at night, and let it charge up the next morning. That might keep the cells in tip-top shape. If I buy the same old lead-acid batts.. Looking at this 48v pack. https://bigbattery.com/products/48v-...on-power-pack/ It might be chargeable with the TS-45 if I turn off the PWM and tweak the charge & float voltages. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..

04-06-21, 10:02 PM	#32
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,897 Thanks: 111 Thanked 248 Times in 228 Posts	48v bdgr - nmc - 80ah - 3.9kwh After testing the old 48v pack, I found the old 12v Duralast batts might still be pretty good. The cheap HF tester showed 400 to 550 Cold Cranking Amps. These are rated at 800 CCA new. So, I plan to keep them for a while longer, in case the new 48v pack fails. This 48v pack is a new release "Generation 2" that's packing 80 Ah. "KIT 48V BDGR - NMC - 80AH - 3.9KWH" https://bigbattery.com/products/48v-bdgr-kit-of-2/ Should be here tomorrow. I hope to get it installed and tested this weekend. Tonight I removed the LA batteries without any back injury.. The old Solar controller is now programmed to charge at 50.4 volts. I have a new 2000W SineWave inverter to replace the old 2500W MSW unit. Here's a video: https://youtu.be/bNh9g0tZIns I will keep the old one for a back-up incase the new Sinewave unit fails. The old Morningstar - Tristar 45A Solar charge controller has been working so well, I'm buying a spare with my free money check. https://www.amazon.com/gp/product/B0012DNFT2 Anyways, I hope to run part of my home on the back-up system on the weekends. When I'm home all day and leave my PC on much of 48 hours. It will also be running my Wifi router and the FiOs box in basement and the small freezer down there. During sunny summer weekends, three 200w panels will be bringing in up to 600W. So, I'll want to be using more than that, to cycle the new 48v pack.. Maybe the new inverter will be able to run the Santa Fe dehumidifier.?. It runs at about 600 watts, but I think the start-up is going to be pretty high. I could run it with the blower fan ON all the time. So it's start-up wouldn't be added in with the compressor start load. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..

04-16-21, 07:12 AM	#33
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,897 Thanks: 111 Thanked 248 Times in 228 Posts	120 Ah 50.4v The rains have started. The sun is only been out a couple of days this past week. Flooding season is here. But, I've got 5.85 kWh of NMC Li-Ion fully charged. Untested, because we didn't have time. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..

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