DyslexicDancer
New Member
- Joined
- Aug 3, 2022
- Messages
- 27
I'm in the process of building a small 300 sq/ft off grid cabin in Texas and had a question for you guys on going full DC vs going AC/DC
My situation is that I have already purchased 24 CATL 302AH batteries for this project and approximately 4kw of used solar panels I purchased off Craigslist. and I'm not sure which direction I should go with the the solar power system
The original plan was to assemble the battery into a 8S3P 24V 24Kwh battery and power everything off DC. That means buying a more expensive DC refrigerator and a more expensive 24V DC 9000 BTU Mini Split Heat Pump. I can get a 24V R134A Mini Split from China for about $1500 , for a Fridge/Freezer I was planning on buying a 24V R134A Compressor from China to modify a used Fridge I already have. Changing out the compressor and re-charging the unit shouldn't be too much of a problem, but there is the extra cost of the new DC compressor to consider. Lighting will be 24V LED, they are not really a factor in my decision as they are pretty inexpensive. If I go this route I'll also need to purchase charge controllers for the system. I was looking at using two 100amp EPEVER charge Controllers ($900) or possibly two 100 Amp Victron charge Controllers ($1600)
I have been thinking lately that it might be better to assemble the battery into a 16S1P 48V 16Kwh battery paired with a growatt 3000TL inverter. I have the SPF3000TL inverter already, so there's no additional cost for the Inverter if I go this route. This simplifies the system as I can use the Growatt Inverter for charging the battery and for powering the fridge I already have , I can purchase a Pioneer 110V 9000BTU Mini Split for a lot less than the 48V DC Mini Split from China and I have more faith in the Pioneer Mini Split than an Unknown quality 48V Mini Split that I've found on Alibaba. For lighting I'd use a DC/DC converter to power the 24V DC lighting
What do you guys think? Is it better to lower the battery capacity to 16KW and go with a 16S1P 48V battery, the Growatt Inverter/Charger, and AC Appliances, or is it better to keep everything DC and go with a bigger 8S3P 24Kwh 24V battery?
Also I currently plan to use an Overkill BMS, but wanted to know if you guys think the JK BMS would be a better choice since it has 2A of active balancing and 200Amps of output?
Thanks in advance for the advise, I appreciate it
My situation is that I have already purchased 24 CATL 302AH batteries for this project and approximately 4kw of used solar panels I purchased off Craigslist. and I'm not sure which direction I should go with the the solar power system
The original plan was to assemble the battery into a 8S3P 24V 24Kwh battery and power everything off DC. That means buying a more expensive DC refrigerator and a more expensive 24V DC 9000 BTU Mini Split Heat Pump. I can get a 24V R134A Mini Split from China for about $1500 , for a Fridge/Freezer I was planning on buying a 24V R134A Compressor from China to modify a used Fridge I already have. Changing out the compressor and re-charging the unit shouldn't be too much of a problem, but there is the extra cost of the new DC compressor to consider. Lighting will be 24V LED, they are not really a factor in my decision as they are pretty inexpensive. If I go this route I'll also need to purchase charge controllers for the system. I was looking at using two 100amp EPEVER charge Controllers ($900) or possibly two 100 Amp Victron charge Controllers ($1600)
I have been thinking lately that it might be better to assemble the battery into a 16S1P 48V 16Kwh battery paired with a growatt 3000TL inverter. I have the SPF3000TL inverter already, so there's no additional cost for the Inverter if I go this route. This simplifies the system as I can use the Growatt Inverter for charging the battery and for powering the fridge I already have , I can purchase a Pioneer 110V 9000BTU Mini Split for a lot less than the 48V DC Mini Split from China and I have more faith in the Pioneer Mini Split than an Unknown quality 48V Mini Split that I've found on Alibaba. For lighting I'd use a DC/DC converter to power the 24V DC lighting
What do you guys think? Is it better to lower the battery capacity to 16KW and go with a 16S1P 48V battery, the Growatt Inverter/Charger, and AC Appliances, or is it better to keep everything DC and go with a bigger 8S3P 24Kwh 24V battery?
Also I currently plan to use an Overkill BMS, but wanted to know if you guys think the JK BMS would be a better choice since it has 2A of active balancing and 200Amps of output?
Thanks in advance for the advise, I appreciate it