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  1. CaliSunHarvester

    5kWh wall mounted battery under $1000

    I just saw this product online and wanted to share with the community what I believe is a good deal. Possibly not the right forum? For obvious reasons, no link here. I bought an 80A solar charge controller from this company and it worked right out of the box. Had some interaction with customer...
  2. CaliSunHarvester

    How do wire ratings work? Found hot wires

    Environment: 24V system 12 panels total 3.12kW pv 80A SCC I was looking at my wiring with my new thermal imaging camera. I noticed that with peak sun (and we are just in March, mind you), the wires from the charge controller towards battery are very warm, both near the SCC, and at the DC...
  3. CaliSunHarvester

    Best temperature for batteries (LiFePO4)

    What is the best temperature for server rack type LiFePO4 batteries? I put mine with the AIO in a dedicated shed that is under a roof overhang on the northern side of the building, it's never in the sun. The AIO insists on indoor installation, so I went overboard with wall thickness etc..: wood...
  4. CaliSunHarvester

    Wooden battery rack and temperatures

    Hello, I have a battery bank consisting of 5 identical 100Ah rack batteries from SunGoldPower. I built a wooden rack structure to store them. It looks like this: The walls (left/ right) are 2x8s, and each level's floor is from 2x12s. The rack is open at the back and open at the front. There...
  5. CaliSunHarvester

    Please review my panel setup

    In the past, I built an off-grid 24V system with a 3kW inverter and 3kW panels, which I use to power a detached workshop, and to charge a PHEV. This has worked well for a little over a year. So I felt confident, to build a somewhat larger system with 25kW storage on 48V basis. This one should...
  6. CaliSunHarvester

    Terminology.. phased power, apparent power, active power?

    The following screenshot is from the SmartESS app. It has been confusing me since day 1. In my world of ignorance, Voltage * Current = Energy, aka V*A = W. Now I read that VA is not quite the same as W. Apparent power vs phased power? And why is the first leg labeled "A" and the 2nd is "2"...
  7. CaliSunHarvester

    Voc on used panels, MPPT Voc limit etc, temperature coefficient

    Posting this as I was hijacking someone's thread where the temperature coefficient was mentioned. In my ~2 week old installation I apparently run the risk of sending too high voltage to the charge controller. I consider myself very lucky reading the other thread and catching the temperature...
  8. CaliSunHarvester

    Electric water heater consumption

    With some circuits now powered by solar, I thought we would not consume as many Wh. Last night, over a 13h interval, the meter moved forward by 36 kWh. We do have 3 electric water heaters on the property.. one is 19G @ 120V (outside, vacant house), one is tankless and nobody was there last...
  9. CaliSunHarvester

    how does grid-tie work?

    Hello, I do have a possibly not standard situation where I have an existing permitted grid-tied solar installation (approx from 2003, 40 panels 125W each, with 2 strings -- the inverters failed in 2016 and 2017 and were replaced). No batteries in 2003. In spite of average daily production of...
  10. CaliSunHarvester

    Where to buy (big) bus bars in California

    I am looking to build a tower of 4 rack batteries and would like 2 bus bars vertically installed left and right. When searching for bus bars, I can only find products that are maybe 8 inches long. Where can I buy something like 30 or 40 inches long (matching the combined battery height)? Make...
  11. CaliSunHarvester

    How to configure AmpInvt charge controller for LiFePO4?

    I received and installed my new 80A solar charge controller from AmpInvt (label looks also like ImpInvt) and unfortunately, the setup menu only has support Agm, gel, sla, lithiumIon But not LiFePO4 And no "user defined" option What can I do?
  12. CaliSunHarvester

    Risk of spark?

    When I built my system, I used a resistor to pre-charge the equipment when I made the final connection to close the circuit. Solar array is ~75V/ 30A Battery is LiFePO4 bank 24V/ 600A Now I need to swap the solar charge controller. The breaker switch between panels and controller is off. Solar...
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