Hello All,
I am building my dream: an mobile espresso hot chocolate shop. I have the bus with new engine and transmission. I have the italian espresso machines and american chocolate melters. Now I need a robust power system to run the food equipment. That Is what this conversation is about. 24V food truck Power System
A quick rundown of the power system components already chosen:
APU SECTION: 9kW NOMINAL
4 x 140amp 24volt Alternators ( prestolite BLP 3312 MultiPower--all 4 alternator are common regulated load sharing with the prestolite Multipower system)
1 x Kubota D722 three cylinder diesel engine (14kW peak output power, hoping to run around 2000rpm to yeild up to 9kW output)
This will yield up to 400Amp 28V continuous power! that is 11,200 watts. I will call this 9kW nominal APU
24V RAIL / CIRCUIT BREAKER PANEL SECTION
1 x Alpha Technologies 020-671-20 Rear Access Bullet Breaker Panel 23" 600 A
N x various Airpax Sensata CMLHP dc rated circuit breakers
N x 4/0 and 2/0 copper cables ( spare no expense on cables! )
INVERTER SECTION
1 x Samlex S-2024A ( 24vdc in 120vac out 2000W pure sine inverter/charger) --powers 120vac loads
1 x Aims Power PE300024230S ( 24vdc in 230vac out 3000W pure sine inverter ) --powers sensitive 230vac loads
1 x Aims Power PUK500024230W ( 24vdc in 230vac out 5000W modified sine inverter ) --powers resistive heating element 230vac loads
The samlex is already onboard and working fine, so no reason to get rid of it. The Aims units are chosen for the cheap price. With the price of the Aims inverters, I can afford to keep spare inverters on hand, which is very desirable.
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now for the fun part: choosing the batterys and DC to DC battery charger for the lithium batteries
BATTERY SECTION
starting battery
2 x Motorcraft BH31XT (wired in series to provide 24v starting and a "cushion" for the alternators and inverters to ride on. )
deep cycle battery
2 x Tesla Model S battery module, 24V, 250Ah,5.2kWh (to provide deep cycle service for the truck when parked)
DC TO DC BATTERY CHARGER SECTION
????????????
I don't have a clue! Charging the lithium battery seems like a big chore! HELP ME ON THIS ISSUE??? please?
This system has the following two states:
APU engine running:
400A 24vdc ( 9600W ) continuous power source
up to 5000W continuous inverter loads ( up to 6000W peak inverter loads )
up to ????? W load to charge Lithium batteries. --can somebody help me with the maths here?
APU engine off:
lead acid battery disconnected, (reserved for starting) (yes this is about 10 or 20 times overkill for a baby diesel engine--it is sized to cushion the alternators )
lithium Battery supplying power
up to 1200W 120vac inverter loads (power to refrigeration and chocolate melters)
all 230vac inverters shut down.
up to 200W lighting loads
future upgrades:
shore power charger input
solar array capable of running refrigeration and holding batteries charge.
I am building my dream: an mobile espresso hot chocolate shop. I have the bus with new engine and transmission. I have the italian espresso machines and american chocolate melters. Now I need a robust power system to run the food equipment. That Is what this conversation is about. 24V food truck Power System
A quick rundown of the power system components already chosen:
APU SECTION: 9kW NOMINAL
4 x 140amp 24volt Alternators ( prestolite BLP 3312 MultiPower--all 4 alternator are common regulated load sharing with the prestolite Multipower system)
1 x Kubota D722 three cylinder diesel engine (14kW peak output power, hoping to run around 2000rpm to yeild up to 9kW output)
This will yield up to 400Amp 28V continuous power! that is 11,200 watts. I will call this 9kW nominal APU
24V RAIL / CIRCUIT BREAKER PANEL SECTION
1 x Alpha Technologies 020-671-20 Rear Access Bullet Breaker Panel 23" 600 A
N x various Airpax Sensata CMLHP dc rated circuit breakers
N x 4/0 and 2/0 copper cables ( spare no expense on cables! )
INVERTER SECTION
1 x Samlex S-2024A ( 24vdc in 120vac out 2000W pure sine inverter/charger) --powers 120vac loads
1 x Aims Power PE300024230S ( 24vdc in 230vac out 3000W pure sine inverter ) --powers sensitive 230vac loads
1 x Aims Power PUK500024230W ( 24vdc in 230vac out 5000W modified sine inverter ) --powers resistive heating element 230vac loads
The samlex is already onboard and working fine, so no reason to get rid of it. The Aims units are chosen for the cheap price. With the price of the Aims inverters, I can afford to keep spare inverters on hand, which is very desirable.
======================================================================
now for the fun part: choosing the batterys and DC to DC battery charger for the lithium batteries
BATTERY SECTION
starting battery
2 x Motorcraft BH31XT (wired in series to provide 24v starting and a "cushion" for the alternators and inverters to ride on. )
deep cycle battery
2 x Tesla Model S battery module, 24V, 250Ah,5.2kWh (to provide deep cycle service for the truck when parked)
DC TO DC BATTERY CHARGER SECTION
????????????
I don't have a clue! Charging the lithium battery seems like a big chore! HELP ME ON THIS ISSUE??? please?
This system has the following two states:
APU engine running:
400A 24vdc ( 9600W ) continuous power source
up to 5000W continuous inverter loads ( up to 6000W peak inverter loads )
up to ????? W load to charge Lithium batteries. --can somebody help me with the maths here?
APU engine off:
lead acid battery disconnected, (reserved for starting) (yes this is about 10 or 20 times overkill for a baby diesel engine--it is sized to cushion the alternators )
lithium Battery supplying power
up to 1200W 120vac inverter loads (power to refrigeration and chocolate melters)
all 230vac inverters shut down.
up to 200W lighting loads
future upgrades:
shore power charger input
solar array capable of running refrigeration and holding batteries charge.