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Order of Operations: Adding first battery to Sol-Ark 15k system

Mr.Hyde

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Pittsburgh, PA
[Got buried on the General Discussion page but I wasn't sure if it was a "Battery" or "Inverter" question. I'll try here]

Hi Everyone,

I will be self-adding two PowerPro batteries to my new-ish Sol-Ark 15k system that currently has no batteries. I have enough professional experience with HV DC batteries (200V+) to know it is important to get the order of operations right.

Before connecting anything, I will set the ID of the Master battery to 64, turn it on, and select the "P03-SLK" protocol. Then I will set the ID back to 1 and then power off the battery.

I'll wire one PowerPro to each of the battery connections on the 15K.
I will connect one battery comms cable between them. Question: It looks like this is just a straight-through Ethernet cable (twisting 1&2 and 7&8)?
I will connect a comms cable (CAN) from the Master battery [CANH: 4, CANL: 5] to the Sol-Ark [CANH: 4, CANL: 5]
I will set the ID of the Master battery to ID 1 and the Secondary battery to ID 2.
I will set “BMS Lithium Batt 00” on the 15K

Question: Do I set the Sol-Ark battery enable before or after I connect and power on the battery?

Question: Is this sequence correct?

  1. Power Off 15k (AC breakers/disconnects off, PV DC disconnect off, power button off, battery breaker off)
  2. Make battery connections
  3. Sol-Ark Battery Breaker ON
  4. Press the power button on the Sol-Ark
  5. Turn the PV DC disconnect switch on the outside of the Sol-Ark ON
  6. All 15k AC breakers / disconnects (“GRID”, “GEN” and “LOAD”) ON
  7. Master Battery Breaker ON
  8. Master Battery Power Button ON
  9. Secondary Battery Breaker ON
  10. Secondary Battery Power Button ON
Thanks!
 
I don't know about all that powering on the solark first.

Main thing is when you turn on the first battery breaker the battery should have a closed circuit to the sol ark. It will start precharging immediately and it needs to be connected to the inverter to do so. If it's unconnected it will complete it's precharge cycle that way, and then get hard connected to if it's connected to the inverter after that.
 
  1. Power Off 15k (AC breakers/disconnects off, PV DC disconnect off, power button off, battery breaker off)
  2. Make battery connections
  3. Master Battery Breaker ON
  4. Secondary Battery Breaker ON
  5. Master Battery Power Button ON
  6. Secondary Battery Power Button ON
  7. Sol-Ark Battery Breaker ON
  8. Press the power button on the Sol-Ark
  9. Wait for Sol-Ark to boot
  10. Turn the PV DC disconnect switch on the outside of the Sol-Ark ON
  11. All 15k AC breakers / disconnects (“GRID”, “GEN” and “LOAD”) ON
 
  1. Power Off 15k (AC breakers/disconnects off, PV DC disconnect off, power button off, battery breaker off)
  2. Make battery connections
  3. Master Battery Breaker ON
  4. Secondary Battery Breaker ON
  5. Master Battery Power Button ON
  6. Secondary Battery Power Button ON
  7. Sol-Ark Battery Breaker ON
  8. Press the power button on the Sol-Ark
  9. Wait for Sol-Ark to boot
  10. Turn the PV DC disconnect switch on the outside of the Sol-Ark ON
  11. All 15k AC breakers / disconnects (“GRID”, “GEN” and “LOAD”) ON
Thanks @robby
I guess I'm surprised that the capacitors are on the "battery" side of the Sol-Ark battery breaker (and I definitely want those connected to the battery before I turn the battery one so that it soft-starts into them... right?)
 
Thanks @robby
I guess I'm surprised that the capacitors are on the "battery" side of the Sol-Ark battery breaker (and I definitely want those connected to the battery before I turn the battery one so that it soft-starts into them... right?)
Should work fine if you do the inverter battery breaker right after you switch on the batteries. Also I see no problem doing the inverter breaker first if that makes you more comfortable.
 
I guess I'm surprised that the capacitors are on the "battery" side of the Sol-Ark battery breaker (and I definitely want those connected to the battery before I turn the battery one so that it soft-starts into them... right?)
I was wondering about that too. I think it is better to get all the breakers turned on so pre-charge occurs and then switch on the battery BMS. I would power on the Sol Ark last.

On my system at least the battery breakers are before any capacitors and actually in a central connection / breakers box they call the "Power Distribution Panel". I didn't understand the proper way to pre-charge at first. I tripped the BMS overload on my batteries the first couple times I tried this, but no damage occurred. I had the batteries all the way on and then then flipped the DC breaker between the inverter and the battery bus.

So I got a small light incandescent bulb to patch across the breaker. That worked, but eventually I figured out the correct sequence. The instructions weren't very clear on this. You could check with a voltage meter. You should see the voltage start at 52-54, then dip and come back up when you close the inverter breakers.
 
I was wondering about that too. I think it is better to get all the breakers turned on so pre-charge occurs and then switch on the battery BMS. I would power on the Sol Ark last.

On my system at least the battery breakers are before any capacitors and actually in a central connection / breakers box they call the "Power Distribution Panel". I didn't understand the proper way to pre-charge at first. I tripped the BMS overload on my batteries the first couple times I tried this, but no damage occurred. I had the batteries all the way on and then then flipped the DC breaker between the inverter and the battery bus.

So I got a small light incandescent bulb to patch across the breaker. That worked, but eventually I figured out the correct sequence. The instructions weren't very clear on this. You could check with a voltage meter. You should see the voltage start at 52-54, then dip and come back up when you close the inverter breakers.
Yeah, I ended up doing it the way I suggested at first as I highly doubted the capacitors were on the outside of the breakers.

  1. Everything off.
  2. Connections made.
  3. Breakers on.
  4. Battery "turned on" (button)
  5. Power up Sol-Ark

This worked, no damage, no trips.
 

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