An off-grid solar kit typically includes solar panels, a charge controller, a battery or battery bank, an inverter, and the necessary cabling and connectors. Some kits also include mounting hardware. However, many "kits" sold online are incomplete and require you to source additional components separately. Always check what is and is not included before buying.
Off-grid solar kits are appealing because they promise a complete, matched solution in one purchase. The reality is more nuanced. Understanding what a typical kit includes, and what it does not, will help you buy confidently and avoid unexpected gaps in your system.
The Core Components of an Off-Grid System
Before examining what kits include, it helps to know what every off-grid solar system requires:
- Solar panels: generate DC power from sunlight
- Charge controller: regulates charging to protect batteries
- Battery bank: stores energy for use when there is no sun
- Inverter: converts stored DC power to AC for appliances
- Cabling and connectors: connects everything together safely
- Fusing and overcurrent protection: protects cables and components
- Mounting hardware: secures panels to a roof, frame or ground mount
What Most Kits Actually Include
Most off-grid solar kits sold in the UK include items 1-3, sometimes item 4, and rarely items 5-7 in their entirety. Here is a typical breakdown:
Usually included
- Solar panels (wattage varies; 200W-2kW is typical for consumer kits)
- MPPT charge controller (sized for the panel array)
- MC4 connector cables between panels and controller
Sometimes included
- Battery or battery bank (often lead-acid at entry level; LiFePO4 in better kits)
- A basic inverter
- Panel mounting brackets
Rarely included
- Battery cable (thick DC cable from controller to battery)
- Fuse holders and fuses
- Bus bars or connection terminals
- Consumer unit or load distribution panel
- Monitoring equipment
EcoFlow All-in-One Approach
EcoFlow's ecosystem takes a different approach. Their power stations combine the battery, inverter, charge controller and output management in one unit. Paired with their folding or rigid solar panels, you get a genuinely complete system with no missing components.
For example, an EcoFlow DELTA 2 plus two 220W portable panels is a self-contained 1024Wh off-grid system with AC, DC and USB outputs, solar MPPT charging, and app monitoring. Nothing additional is required to start using it.
For larger permanent installations, EcoFlow's PowerStream and PowerOcean systems require professional installation but again represent a more complete package than piecemeal component kits.
Questions to Ask Before Buying Any Kit
- Does it include a battery? What chemistry and capacity?
- Is an inverter included? What type (pure sine wave or modified)?
- What cable is included, and is it sufficient for the installation?
- Is overcurrent protection (fusing) included?
- Does it include panel mounting hardware?
- What is the warranty on each component?
Sizing a Kit for Your Needs
A basic off-grid kit for a garden shed or small cabin should include at minimum:
- 200-400W of solar panels
- 30-40A MPPT charge controller
- 100-200Ah LiFePO4 battery (12V)
- 1000-2000W pure sine wave inverter
For a permanent off-grid home or cabin, scale up significantly: 2-4kW of panels, a 48V battery bank of 10kWh or more, and a 3-5kW inverter/charger.
DIY vs Pre-Configured
Building your own system from individual components gives you full control over sizing and quality. Buying a pre-configured kit is faster and the components are guaranteed to work together. For most non-technical buyers, a matched kit from a reputable supplier is the safer starting point. Just read the component list carefully before purchasing.
