Description

22-16-20 DIY Solar Kit – 22kW Off-Grid Inverter, 20kWh Battery & 16kWp Solar

A practical DIY solar kit designed for self-consumption, everyday household use, and essential backup power.
Ideal for homes looking to reduce grid reliance without oversizing the system or relying on unrealistic assumptions.

22-16-20 DIY Solar Kit

22kW Off-Grid Inverter · 20kWh Battery · 16kWp Solar

This is a true off-grid power system designed for sites that require very high instantaneous power and reliable energy availability without relying on grid export or DNO approval.

Using two 11kW off-grid inverters operating in parallel, this system provides up to 22kW of continuous power, making it suitable for demanding residential, agricultural, and commercial applications.

🔋 What’s included

• 36 × 450W Solar Panels (≈ 16.2kWp max)

• 2 × 11kW Off-Grid Inverters (parallel operation – 22kW total)

• 2 × 10.24kWh Lithium Batteries (20.48kWh total)

  • Integrated fire suppression

  • Integrated battery heaters for cold-weather performance

• 50 metres of PV solar cable

• DC PV Isolator

• AC Isolators

• Solar cable connectors (MC4 compatible)

Roof mounting system not included – roof type varies by installation.

✔ What this kit is ideal for

• Whole-house backup power

• High-load homes with multiple appliances running simultaneously

• Farms, workshops, and rural properties

• Electric showers (sensible use)

• Heat pumps with backup support

• Sites with unreliable or weak grid connections

• Customers who want power certainty, not export paperwork

⚠ Important design notes

• This system is configured as a fully islanded off-grid power system

• No grid export capability

• No DNO export approval required

• A generator or grid-connected charger can be added if extended winter autonomy is required

⚠ Battery & autonomy considerations

While this system delivers extremely high power, battery capacity still determines runtime.

• 20kWh provides strong short-term autonomy and peak-load handling

• For longer runtime, winter resilience, or reduced generator use, a larger battery system is recommended

💡 Important note

This system prioritises power availability and resilience over minimal component count.
It is designed for users who understand that large electrical loads require appropriately sized energy storage.