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  • Stacked Rosies

    Posting my first pictures of a couple of Stacked Rosies. (no solar yet, just whole house battery) I nervously turn off the AC Input to run the puppies on Battery. I saw a slight dip in lights, but everything kept running WooHoo!. But, I still cannot figure out how to get the second Rosie...
  • Why was I getting shocked??

    So I’m added a Class T fuse to my battery. Made sure the master switch was off of my monster 600V power switch. And as I was tightening the bolts, my knuckle touched the negative wire and I got a minor zap. 😳😳. So I stopped what I was doing, brought out my volt meter and sure enough...
  • Stacked Rosie Stress Test / 13859W

    I'm not sure this is a "real" stress test because I didn't break it, but wanted to share my results from my stress teset today. I was impressed with Rosie. Load: 13859W on AC, 12370 on Battery (something finished or turned off) Things providing the load. 2 4gal bosch water heaters (1440W...
  • Electric component vendors

    Does anyone have a favorite vendor in the greater Austin area for a raceway and related components?
  • How does a BMS control each battery?

    Just curious. The BMS can charge individual batteries (balancing) and can shut-off the entire battery via the BMS circuit board. All the batteries are connected together via the bus bars, and are connected to the inverter, or grid or generator. I don't think there is any...
  • 2 New JK-PB1A16S15P

    I have 2 brand new JKBMS JK-PB1A16S15P, never installed, still in box (I opened 1 to check out the contents). I purchased for $143.27 and willing to sell for $130 each and free shipping. After looking at my inverter and load needs, I will be purchasing the 200a version. Guaranteed against...
  • Blue Sea T-Class fuse on sale

    I just bought a bunch of these from overstock.com affiliate. Price was $15.95 envyensembleemporium.shop/products/blue-sea-systems-5119-class-t-fuse-051198?currency=USD&variant_sku_code=5601903-0-0-0-0-0-0&msclkid=c9e674219a0c127e46d5121252e47b90
  • Safety question when working with 48V/300A

    I hope this isn't toooo stupid of a question. <sigh> I'm building my batteries and hooking them up to 2 stacked Rosies. Since I'm working with 48V and potentially 300A, when doing final connections, what is the safe approach so I don't create sparks/arcs in either wire to connections, or...
  • Review please. 2 Inverters, 2 batteries with critical load panel

    Hello, I'm putting together my backup solution (minus solar for now). Attached is a picture of the whole solution (up to this point). Please let me know if this all makes sense. I'm looking at: 2 Rosie Inverters 2 15kWh Batteries Adding a Critical Load Panel Couple of questions a. I think...
  • Shunt location question

    I'm trying to figure out if I need 1 shunt or 2, or if I need to change my planned wiring to accommodate a shunt. Current scenario is 2 batteries and 2 stacked inverters connected via a busbar. In this configuration I'm confused if I need 1 or 2 shunts? Or, should I change the wiring...
  • Vertical Battery Case with wheels

    I already had a BMS, so was looking for a vertical case without a BMS and not for $600. What a PITA!. Anyway, finally found one with wheels XR05-48V280AH. (just basic case with no electronics) and $292 with free shipping. It has wheels, so no lifting it needed! I won't receive it until...
  • Neutral wiring question for 2 inverters

    I have question related to neutral wiring using 2 inverters AND bypass switches for each of the inverters. My inverter wiring diagram is straight forward, L1/L2 + neutral in from grid panel, and L1/L2+neutral out to load panel(for each inverter). But when I add the bypass, would I be...
  • Battery cable question for large Amperage

    I've purchased 2 Rosie's and am trying to figure out the battery cable path to the Rosie's. With 1 battery and 1 Rosie, it's pretty straight forward, but when doubling both the batteries and the Rosies, the amperage draw could be pretty significant. So with 2 Inverters and 2 batteries, I'm...
  • 1 or 2 shunts?

    I will have 2 batteries that I will bring together into a bus bar to then present to 2 inverters. Does it make sense to have 2 shunts to track SOC for each battery, or should I just do 1 for the entire battery set? Thanks
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