20kw Solar Power System

The system includes: a 20kW hybrid inverter (system inverter), a 6kW 48V DC pure sine wave inverter (as specified), 400W mono solar panels (model GP-300M-6056), eight 250Ah lead-acid batteries, PV combiner boxes (6-input/2-output, qty 2), MC4 connectors, 4 mm2 PV cabling (approx. 801 meters as specified), and mounting structure for tile roofs (optional).

The product is configured as an off-grid solar power system (standalone). The included hybrid inverter can manage PV and battery supply for AC loads without relying on the grid.

This system is suitable for refrigerators, energy-saving lighting (LEDs), TVs, fans and small street lights. Actual runtime and simultaneous operation depend on total appliance load and battery state — do a load calculation to confirm.

A 20kW array using 400W panels needs about 50 panels (20,000W / 400W = 50). Each 400W panel typically occupies ~1.8–2.0 m², so expect roughly 90–100 m² of roof area depending on panel model and spacing.

With eight 250Ah 12V lead-acid batteries configured for a 48V system, the gross stored energy is about 24 kWh (48V × 250Ah × 2 strings = 24 kWh). For lead-acid batteries a recommended usable depth-of-discharge is ~50%, so usable energy is roughly 12 kWh. Runtime depends on your load (for example, a continuous 1.5 kW load would run ~8 hours on ~12 kWh usable).

Yes, the system can often be expanded, but expansion limits depend on the inverter's input capacity and battery bank configuration. Expansions should be designed to match voltages, current limits and protection devices — consult the supplier/installer for a safe upgrade plan.

Regular tasks include cleaning panels (remove dust/debris), checking and tightening electrical connections and MC4 connectors, inspecting mounting hardware, monitoring battery health (electrolyte levels for flooded lead-acid), and ensuring proper ventilation for batteries. Perform periodic inverter and system checks according to the manufacturer's schedule.

Solar generation drops in cloudy conditions and is zero at night. The battery bank supplies power when PV output is insufficient. Duration of supply depends on battery capacity and load. For multi-day autonomy in extended cloudy periods you would need a larger battery bank or backup generator.

Typical protections include MPPT charge control, overcurrent and short-circuit protection (via PV combiner boxes and breakers), surge/lightning protection (as optional/required), proper fusing between strings, and pure sine-wave inverter output for safe operation of AC loads. Verify specific protection devices with the vendor.

Installation requires a suitable roof or ground mounting area, structurally sound support for panels, a ventilated battery room/box, proper DC and AC wiring routes, earthing/grounding, and adherence to local electrical codes. Typical residential off-grid installs can take several days to a week depending on site complexity and crew size.

Typical expectations: PV panels often have 25-year performance warranties and 10–12 year product warranties; inverters commonly have 5–10 year warranties (extendable); lead-acid batteries usually last 3–6 years depending on use and maintenance. Exact warranty terms vary—get the supplier's warranty documents.

Lead-acid batteries require a well-ventilated space (to avoid hydrogen gas build-up), stable temperature, and a non-flammable floor. They should be installed in a dedicated ventilated battery room or enclosure, away from living spaces, and follow local safety codes.

Many hybrid inverters support local displays and optional remote monitoring via Wi-Fi/Ethernet or proprietary gateways. Monitoring options depend on inverter model — ask the supplier for available monitoring hardware and setup.

The PV array rating (20 kW) is generally capable of supporting heavy loads during peak sun, but continuous supply and battery/inverter surge capacity must be considered. Air conditioners have high startup currents; confirm inverter continuous and peak power ratings and perform a load/start-up assessment before connecting large inductive loads.

The system has a relatively simple structure, is designed for standalone (off-grid) use, and is sized for a single household — making it practical for remote or scattered rural locations without reliable grid access. Individual household configuration allows accurate sizing and billing-free operation.