Battery & electrical system for solar mountain bike van remote office build

liberatetutemet

Solar Enthusiast
Joined
Jan 30, 2021
Messages
50
Hi I am building out my 4wd astro van out as a mobile LTE office so I can work my remote job and ride mountain bikes out west all summer. I am in the planning stages and have only ordered thus far a 4s 12v varicore 280ah, which is delayed because of chinese new year.

I am on the fence of contacting the seller to switch to 8s to run a 24 volt system which I think is a better outcome for capacity, wiring, ease of installation and performance but I am concerned over availability of quality 24v components for my system I can find appliances just fine, it's the system itself I am concerned with. I have many many questions that hopefully some of which can be answered by someone knowledgeable.

1. Is there a reliable/known go-to 24v pure sine wave inverter/charger that everyone likes? It seems like the Giandel 24v 2kw is well regarded but it doesn't have charge functionality. This is the only one I have found thus far: https://www.sigineer.com/product/1500-watt-24v-dc-to-110v-120vac-inverter-charger-pure-sine-wave/

2. Is there a good smart BMS WITH WORKING low temp shutoff option for 24v 8s DIY battery bank?

3. Any reliable budget 12valternatorDC-24batteryDC chargers out there? I considered the renogy 50a mppt/alternator charger box but it doesn't handle panels in series so that's pretty much out.

4. Do I have to do anything smart/special to charge a lifepo4 battery bank from multiple charge sources simultaneously? (i.e. solar + alternator or solar + shore powered inverter/charger)

Additional info: Planning on doing renogy 300 or 400watt solar kit https://www.renogy.com/new-300-watt-12-volt-solar-premium-kit/

I need to run:
  • 28" 4k monitor (20w), 8 hours/day
  • Mini itx workstation with Ryzen 3800x and RTX2080Super (300-400 watts nominal, probably) 2-3 hours/day
  • Keep 85 watt macbook pro charged up for 8 hours a day on weekdays
  • LTE booster sometimes 24x7 sometimes off
  • Keep phones and tablets, gopro, BT speakers, lithium-ion high powered bike lights, etc. gidgets and gazmos charged regularly
  • Keep the lifepo battery banks at safe charge/discharge temps with a resistive heat pads
  • have capacity left over for adding more optional system components down the line:
    • Low voltage fridge
    • low voltage electric burner
    • low voltage kettle
    • diesel heater
I know this is a lot. Thoughts?
 
Last edited:

liberatetutemet

Solar Enthusiast
Joined
Jan 30, 2021
Messages
50
I will update the original thread with answers to the questions I posed if I do run into them.

Update 1: The 1500w sigineer psw inverter/charger does not support lifepo4 so it is not an option
 

DerpsyDoodler

Photon Sorcerer
Joined
Jan 10, 2021
Messages
1,635
Start with an energy audit. Link in my signature. Second link in my signature is a good place to look for guidance on inverters. Or us will‘s solar power blue prints.
 
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