thetortoise
New Member
- Joined
- Mar 3, 2021
- Messages
- 5
Hi folks,
I'm building a battery system for a food truck/trailer. I'm waffling on my inverter/charger size. I'm having trouble finding a clear answer on a few things so maybe you can answer these questions for me.
System info
Energy requirements: 2200w continuous (1700w actual X 1.25) and 4700w peak. Daily consumption is 9.2kw
Battery: 24v 13.3kw Lifepo4 bank
Electrical Appliances: 3 fridge/freezers, water pump, food processor, rice cooker, range hood
1) My trailer will be parked for charging every night for 10 hours. When choosing the amperage of my battery charger, do I only care that it's big enough to re-charge my batteries in this timeframe? Or is there a minimum charger amperage for a battery capacity ratio (I've seen 30% thrown around) that is optimal for Lifepo4 battery health? I think I'd be fine with a 50amp charger to suit my needs.
2) I'm getting conflicting messaging on how to size my inverter in relation to peak rating. Some say to use your peak watts as the base inverter wattage and some say to make use of the inverter peak rating. My understanding is that if the inverter has a sufficient surge rating and it lasts for several seconds (5+) then I'm fine to match my peak watts to the inverter peak rating. So in my case, if I use an inverter with 3000w continuous and a peak rating of 6000w for 20 seconds then I'm set. I'm wondering if there are reasonable risks to this situation that I'm not anticipating.
Thanks for your input!
Cheers,
Kyle
I'm building a battery system for a food truck/trailer. I'm waffling on my inverter/charger size. I'm having trouble finding a clear answer on a few things so maybe you can answer these questions for me.
System info
Energy requirements: 2200w continuous (1700w actual X 1.25) and 4700w peak. Daily consumption is 9.2kw
Battery: 24v 13.3kw Lifepo4 bank
Electrical Appliances: 3 fridge/freezers, water pump, food processor, rice cooker, range hood
1) My trailer will be parked for charging every night for 10 hours. When choosing the amperage of my battery charger, do I only care that it's big enough to re-charge my batteries in this timeframe? Or is there a minimum charger amperage for a battery capacity ratio (I've seen 30% thrown around) that is optimal for Lifepo4 battery health? I think I'd be fine with a 50amp charger to suit my needs.
2) I'm getting conflicting messaging on how to size my inverter in relation to peak rating. Some say to use your peak watts as the base inverter wattage and some say to make use of the inverter peak rating. My understanding is that if the inverter has a sufficient surge rating and it lasts for several seconds (5+) then I'm fine to match my peak watts to the inverter peak rating. So in my case, if I use an inverter with 3000w continuous and a peak rating of 6000w for 20 seconds then I'm set. I'm wondering if there are reasonable risks to this situation that I'm not anticipating.
Thanks for your input!
Cheers,
Kyle