I am considering installing photovoltaic panels and a backup battery to store energy for our family house. I have extensive purchasing experience in China and a number of contacts at technology companies, so I tried requesting a photovoltaic system directly from a battery manufacturer that offers complete sets.
This page serves as a place to keep my notes, because I am not an electrical engineer and so far have no practical experience with photovoltaic systems.
22.11.2021
I contacted a supplier in China about a complete home solar power system. I received an offer for a single-phase off-grid solution. It included LONGi 400 W monocrystalline panels, a 48 V 200 Ah lithium battery, a 5 kW off-grid hybrid solar inverter with a built-in MPPT controller, a combiner box and the necessary accessories.
23.11.2021
After consulting a friend who built his own photovoltaic system, I specified my requirements more precisely and received a new quotation, shown below. I will ask why this offer uses lower-output panels. I am concerned that 24 panels will not fit on the ideal part of my roof. I also requested datasheets for every item in the quotation. I would be interested to know whether the proposed components make sense together and whether this would be a realistic route to take.
26.11.2021
I received a revised quotation. Files for download:
- roof mounting structure design
- system connection diagram
- Rosen 48V 200AH LiFePo4 Battery-Powerwall
- three phase hybrid inverter datasheet
- 340W POLY datasheet 8kw three phase on grid hybrid system with lithium battery
10.12.2021
I received a door-to-door shipping quote of CZK 42,900 from the carrier.
The total price of the system shown below, including transport, is approximately CZK 210,000, or CZK 255,000 including VAT.
