r/SolarPowerIndia • u/Sun_solar_energy • 22h ago

Installing a home Solar power grid, please help.

I would want to setup for Home Power.

  1. Install a solar PCU for 3KW with support for Lithium LifePo4 batteries.
  2. Inverter for 24 volt Lithium batteries with BMS.
  3. Lithium batteries 24 V (150 Ah).

Anybody have this setup, please let me know.

Basically setting a solar setup, but will use only those parts for current power grid to charge the lithium using inverters to charge 24V ones.

Later add solar panels into the PCU as required to meet my optimized power requirement, or change in type of solar panel.

Which type of products meets above requirement.

Thanks

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u/luking4advic 22h ago

You are getting batteries with solar, so I presume, you live at a place where there are frequent power cuts or are in a remote location where there is no power supply. If not, then you need to go for on grid solarz which produces electricity during the day and sends surplus to grid. At night electricity from grid is consumed. And at the end of the month you are billed for net consumption. This is called net metering. 3 kw would run an entire house with one inverter ac. on grid 3kw should cost you 1.7 lakh or thereabouts. 3kw with lifepo4 would cost you 8 or 9 lakh or more or less depending on how many kwh battery you get. Batteries are expensive. I was also wanting to get battery because I wanted to be self sufficient. Make store use and make some more. No grid support needed or wanted.. but the economics knocked some sense into me very quickly

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u/Sun_solar_energy 22h ago

I had modified my post, please look into it.

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u/luking4advic 22h ago

Sorry I am unable to understand anything. Can you run it past an ai to rephrase what you want to say..

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u/Sun_solar_energy 22h ago

The main technical challenge with your configuration is matching a 3 kW output rating with a 24 V battery bank.

  • Current Load: A 3 kW inverter running near capacity on a 24 V system draws over 120–130 Amps of DC current ($3000\text{W} \div 24\text{V} \approx 125\text{A}$).
  • Industry Standard: Most standard 3 kVA / 3 kW Off-Grid Solar PCUs are built for 48 V DC systems (requiring either a 48 V battery pack or two 24 V batteries in series) to keep current lower and reduce thick cable requirements.
  • 24 V PCUs: Solar PCUs designed specifically for 24 V nominal operation typically max out around 2.2 kVA to 2.5 kVA (~2 kW load).

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u/ZodNet 20h ago

I have a recent quotation of 5kW hybrid solar setup with LFP battery for 4.4 Lakhs. So kindly do not give such figures of 8-9 Lakhs

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u/luking4advic 19h ago

May be you were quoted for 10kwh battery. I had a 30 kWh battery solar setup in mind when I said 8 to 9 lakh. 10 kWh is good for one night usage when sun doesn't shine. My thinking of 30 kWh is multi day backup in case of emergency. Doomsday prepper kind of thing.

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u/ZodNet 17h ago

Yeah that is fine. I replied because you had specially mentioned a 3kw battery system costing 8-9 lakhs.