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Old 02-12-2020, 02:01 PM   #1
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Do these 3 components match up??

Below are three pieces of equipment that Im considering for a solar power system in my bus.

My real power needs are in the 4500 Whr range. I want a bunch of head room above the 4500 range so I can run a space heater in the winter and lots of fans, even off-set some time on my generator in the heat of summer. Ive been running a killawatt for about a year.

No solar panels planned at this time(have room for 6). Will be charging the battery bank from shore power and generator until I buy panels in late spring 2020.

Am concerned with mismatched components and am wondering how long it will take for the 24v 400Ah battery bank to charge to up to 90% with this 80A charger.
Heres the list: 1 each - 2400w Pure Sine Wave Power Inverter; 80A MPPT Solar Charger; DC 24V; AC Output 110V 120V; 60A Utility Charger; 60HZ.
https://www.amazon.com/gp/product/B0...P1NGGWHH21K9VF

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2each- BMS - Smart 7S to 20S Bluetooth 300A lithium Li-ion Lipo LTO LiFePO4 Battery BMS Protection Board 24v
Charging current: 50A
Balance current: 100MA
Wiring method: same port
Size: length 14CM width 7CM thickness 1.7CM
Single cell voltage: detection range 1V-4.6V, accuracy less than 5Mv
Overcharged and paid: protected
Working voltage: 15~80V
Short circuit protection: short circuit protection current can be set
Bluetooth connection: for Android android hand sail
Applicable battery: 7-16 string Li-ion Battery; 8-16 string Lifepo4 Battery;8-16S Titanium lithium
Coulomb counter: accurate calculation based on current versus time
Battery remaining capacity, error range is less than 5%
Power consumption: 3MA at work / 1.5MA during standby
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2 - 24v 400AH batteries - CATL NEW 3.2V200AH LIFEPO4 Product Lithium iron phosphate cell. 16 PCS CATL LIFEPO4 battery 3.2v200AH 2019 new Rechargeable Batteries cell for 24V200AH for RV SOLAR EV Marine
Product Specification Product Name: Lithium iron phosphate cell
Shell Material:Aluminium
Rated capacity:200Ah
Minimum capacity:199Ah
Internal impedance:0.1~0.5mΩ
Nominal voltage:3.2V Dimensions(L*W*H):174*54*207mm Weight:4.00.10kg
Recommend Constant Current:2000A(1C)
End-of-Discharge Voltage:2.5V
Recommend Constant Current:100A(0.5C)
Charge Voltage:3.65V
Maximum Pulse Discharging Current:600A, Charge Voltage:3.65V, Max Continuous Discharge Current:200A(1C), Cycle life (80%DOD):4000 cycles, Charging Temperature:-5~60C, Discharging Temperature:-30~60C
Thanks for looking -Mike
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Old 02-12-2020, 02:27 PM   #2
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The first thing I notice is that when I looked up that battery, I saw its being sold on AliExpress. You're probably going to get a low quality cheap battery that probably won't do you a heck of a lot of good. You're already spending a lot of money, I'd prefer if my money went to a more reputable company like BattleBorn or Victron for their batteries.
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Old 02-12-2020, 03:16 PM   #3
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Quote:
Originally Posted by mrpincher View Post
My real power needs are in the 4500 Whr range.
Do I understand correctly? You anticipate consuming 4500 watts per hour? Is this constant throughout the day? For a total of 108,000 watts over a 24 hour period (watt-hours per day)? From battery? I'm betting I've got it wrong...

Maybe you mean 4500 watt-hours per day? Still a lot but much more manageable.
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Old 02-12-2020, 03:32 PM   #4
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Power user

Takes a lot of juice to be me.


A-OK -4500 Whr per day. A lot of that comes from the toaster oven, microwave, and a small space heater.



All of these appliances perform tasks that could be done in other ways. For me they are unnecessary-conveniences.




MIke
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Old 02-12-2020, 03:35 PM   #5
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Alixpress ?

Quote:
Originally Posted by chiggins View Post
The first thing I notice is that when I looked up that battery, I saw its being sold on AliExpress. You're probably going to get a low quality cheap battery that probably won't do you a heck of a lot of good. You're already spending a lot of money, I'd prefer if my money went to a more reputable company like BattleBorn or Victron for their batteries.

I haven't looked at the Victron Batteries. The BB are out of my budget.
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Old 02-12-2020, 04:10 PM   #6
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It really is not a good idea to produce heat like that from electricity

Especially stored electricity.

You are correct to not bother with solar for this, you would need a lot of panels and they would not be enough.

Propane or direct diesel fueled would be better
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Old 02-12-2020, 04:12 PM   #7
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If you're using electric for heat (heaters, cooking, hot water) you're going to end up with a power system far far larger than you would need otherwise. There's a reason basically all of us use propane.

Can you put a number on how much money you're willing to spend to have an electric space heater instead of something using a different fuel? A small space heater alone can add thousands to your panels/charge controller/storage bank.
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Old 02-12-2020, 05:06 PM   #8
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Space Heaters

Quote:
Originally Posted by john61ct View Post
It really is not a good idea to produce heat like that from electricity

Especially stored electricity.

You are correct to not bother with solar for this, you would need a lot of panels and they would not be enough.

Propane or direct diesel fueled would be better

I have a nice Atwood propane furnace that runs great with my 90 pound propane tank. The furnace is in the rear of the bus and I need to run a duct and vent to the front of the bus where the cold spot is. Laziness has me running a space heater instead.
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Old 02-12-2020, 05:18 PM   #9
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Guessing; at this time I'm using at least 3000Whrs to power one small space heater.



Not practical - in battery storage terms.
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Old 02-12-2020, 05:43 PM   #10
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Yes, only for when on shore power
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