This complete off-grid solar power system is a scalable, fully self-contained package built from LONGi Hi-MO bifacial glass-glass solar panels, a hybrid pure sine wave inverter with built-in MPPT solar charging, and a lithium (LiFePO4) battery bank. Available from 1kW up to 5kW, it's designed to deliver reliable, independent electricity anywhere without a grid connection — from cabins and glamping pods to workshops, boats, and full-time off-grid homes.
System Range
1kW – 5kW
Solar Panels
LONGi Hi-MO 430W bifacial
Battery Type
LiFePO4 lithium
Inverter Type
Hybrid, pure sine wave
Battery Cycle Life
5,000+ cycles
Panel Warranty
25yr product / 30yr power
Battery Brand May Vary: Depending on stock availability, the lithium battery supplied with this system can be from TBB Power, Photonic Universe, or Fogstar. All are LiFePO4 chemistry with broadly comparable performance, but exact capacity, dimensions, warranty terms, and Bluetooth/app monitoring features can differ between brands. Contact us before ordering if you need a specific battery brand confirmed.
Solar Panel Specification May Change: The LONGi Hi-MO panel wattage, dimensions, and cell technology used in this system can vary from time to time depending on manufacturer stock and current model availability. The specifications below reflect the 430W LR5-54HTD panel at the time of writing — confirm the current panel model and datasheet with us before finalising a system design that depends on exact panel dimensions or output.
Bifacial Glass-Glass Panels: The LONGi Hi-MO panels use HPBC back-contact cell technology with a bifacial glass-glass construction, capturing reflected light from the rear of the panel as well as direct sunlight on the front — useful for bright, reflective installation sites such as light-coloured roofing or ground-mounted arrays.
Professional Installation Recommended: Off-grid systems require specialist knowledge of battery wiring, earthing, and system commissioning. Installation by a qualified off-grid or MCS-certified installer is recommended for all system sizes.
True Off-Grid Independence
No grid connection is needed — the system generates, stores, and delivers its own electricity, making it suitable for remote sites with no mains access.
Bifacial HPBC Solar Panels
LONGi's back-contact cell design removes front-side busbars, improving efficiency and heat resistance while the bifacial build harvests additional energy from reflected light.
Long-Life Lithium Storage
LiFePO4 battery chemistry offers a longer cycle life, lighter weight, and greater usable capacity than lead-acid, supporting repeated daily deep discharge without rapid degradation.
Hybrid Inverter Technology
A single hybrid inverter combines MPPT solar charging, battery management, and pure sine wave AC output, with the option to integrate a backup generator for extended cloudy spells.
Scalable From 1kW to 5kW
Choose the system size that matches your energy needs today, with the option to add panels, batteries, or inverter capacity as those needs grow.
Wi-Fi App Monitoring
Track solar generation, battery status, and energy consumption in real time from a phone app, so you always know how much power you have available.
| System Sizing Guide (Typical UK Daily Output) |
| System Size |
Typical Daily Output (UK avg) |
Suitable For |
Usable Battery Capacity |
| 1 kW |
3–5 kWh |
Small cabin, weekend use, lighting & small appliances |
2.5–5 kWh |
| 2 kW |
6–10 kWh |
Larger cabin, glamping pod, basic home |
5–10 kWh |
| 3 kW |
9–15 kWh |
Family weekend home, workshop |
10–15 kWh |
| 4 kW |
12–20 kWh |
Full-time small home, remote office |
15–20 kWh |
| 5 kW |
15–25 kWh |
Larger off-grid home, farm, multiple appliances |
20–30 kWh |
| Solar Panel — LONGi Hi-MO Bifacial LR5-54HTD-430M (Typical Panel Used) |
| Peak Power |
430 W |
| Module Efficiency |
22.0% |
| Maximum Power Voltage (Vmp) |
32.90 V |
| Maximum Power Current (Imp) |
13.07 A |
| Open Circuit Voltage (Voc) |
39.62 V |
| Short Circuit Current (Isc) |
13.86 A |
| Power Tolerance |
0 to +3% |
| Cell Configuration |
108 cells (6×18), HPBC back-contact |
| Construction |
Bifacial dual glass (2.0mm+1.6mm semi-tempered) |
| Frame |
Anodised aluminium alloy |
| Dimensions (L x W x H) |
1722 x 1134 x 30 mm |
| Weight |
22.5 kg |
| Maximum System Voltage |
1500V DC |
| Maximum Series Fuse Rating |
30A |
| Operating Temperature |
-40°C to +85°C |
| First-Year Power Degradation |
<1.5% |
| Annual Degradation (Year 2–30) |
0.40% |
| Materials & Processing Warranty |
25 years |
| Linear Power Output Warranty |
30 years |
| Battery & Inverter (Typical Specification) |
| Battery Chemistry |
LiFePO4 (Lithium Iron Phosphate) |
| Typical Battery Brands Supplied |
TBB Power, Photonic Universe, or Fogstar (varies by stock) |
| Battery Cycle Life |
5,000+ deep cycles |
| Battery Warranty |
5–10 years (varies by brand supplied) |
| Inverter Type |
Hybrid, pure sine wave |
| Inverter Functions |
MPPT solar charging, battery management, AC output, optional generator input |
| AC Output |
230V AC |
| Monitoring |
Wi-Fi app (iOS/Android) |
| Inverter Warranty |
5–10 years |
| What's Included (Typical Complete System) |
| LONGi Hi-MO bifacial solar panels (quantity varies by system size) |
| Hybrid inverter with MPPT charge controller and battery management |
| LiFePO4 lithium battery (capacity varies by system size; brand may vary — see note above) |
| Mounting rails, brackets, and fixings |
| DC and AC cables, fuses, breakers, and safety disconnects |
| Installation manual and wiring diagram |
What size system do I need?
This depends on your daily energy use — a 1kW system suits a small cabin or basic lighting needs, while 3kW to 5kW comfortably covers a full-time home with a fridge, lighting, TV, and water pumps. Contact us with your appliance list and location for a free sizing recommendation.
Which battery brand will I actually receive?
The lithium battery supplied can be TBB Power, Photonic Universe, or Fogstar depending on current stock. All are LiFePO4 chemistry with broadly similar performance, but capacity, dimensions, and warranty terms can differ — get in touch before ordering if you need a specific brand confirmed for your installation.
Will the solar panel specification always match what's listed here?
Not necessarily — the LONGi Hi-MO panel model, wattage, and dimensions supplied can change from time to time based on manufacturer availability. The 430W LR5-54HTD specifications shown here are current at the time of writing, but we recommend confirming the exact panel model with us before finalising any design that depends on precise panel output or dimensions.
How long do the lithium batteries last?
LiFePO4 batteries in this system are rated for 5,000+ deep cycles, translating to roughly 10–15 years of typical use — considerably longer and safer than an equivalent lead-acid battery, with 80–100% usable capacity.
Can I expand the system later?
Yes — the modular design allows you to add extra solar panels, additional battery capacity, or generator auto-start integration as your energy needs grow, without replacing the whole system.
Who should install this system?
A qualified off-grid or MCS-certified installer is recommended for all system sizes, covering safe wiring, correct earthing, and full commissioning of the solar, battery, and inverter components.
