Description
x11kW Professional Off Grid Solar Power Kit With Battery Storage
This professional 11kW off grid solar power kit is designed for users who need reliable, high output energy generation with full independence from the grid. It is ideal for homes, farms, workshops, remote properties, and commercial sites where consistent power, scalability, and uninterruptible power supply is required.
The system delivers a powerful 11kW AC output and is paired with 15kWh of lithium energy storage, allowing you to run demanding electrical loads while maintaining stable power day and night. High-efficiency solar generation is provided by 10 premium JA Solar 450W panels, ensuring excellent performance even in challenging weather conditions.
All components in this kit are professionally selected to work seamlessly together. The system is pre engineered to reduce installation complexity, minimise losses, and maximise overall system efficiency. This is not a basic DIY setup but a complete, professional grade energy solution.
Notice: A wiring diagram is supplied with every solar kit
Designed for True Energy Independence
This off grid system operates independently from the national grid, giving you full control over your electricity supply. Solar energy is used first to power your loads, with excess energy stored in the battery bank for use during the evening or periods of low sunlight.
The system also supports optional grid connection and backup generator input, offering maximum flexibility. If required, the batteries can be charged from the grid during low cost night tariffs or from a generator in extended low solar conditions.
Premium Solar Panels and Reliable Energy Storage
The kit includes 10 high quality JA Solar 450W panels, known for their excellent efficiency, durability, and long service life. These panels deliver strong performance across a wide range of light conditions, making them suitable for year round operation in the UK and Europe.
Energy storage is provided by a 15kWh lithium battery system, delivering fast charging, deep discharge capability, and long cycle life. This ensures stable power delivery and reduced reliance on backup sources.
Expandable and Future Ready System
This solar power kit is designed with future expansion in mind. Additional battery storage or solar panels can be added later if your energy requirements increase. This makes the system a long term investment rather than a fixed capacity solution.
Whether you are aiming to eliminate electricity bills, secure reliable backup power, or power a fully off grid property, this 11kW system delivers performance, flexibility, and peace of mind.
With Grid Backup Capability
Although this is a true off-grid solar system, it is fully compliant with national grid connection standards and can be connected to the grid as a backup energy source if required. This provides an additional layer of security without compromising your energy independence.
The inverter is configured for non export operation, meaning no electricity is fed back into the grid. As a result, no export licence, approval process, or long term energy supplier contracts are required.
When connected to the grid, the system behaves like any other household appliance. It simply draws power when needed to charge the batteries, for example during low cost night time tariffs, while remaining fully independent during normal operation.
Complete System Components Included
This professional off grid solar kit is supplied as a complete solution, with all critical components carefully selected to ensure reliability, safety, and future expandability.
| Component | Description | Quantity |
| Solar Inverter | Conversol MAX-III 11kW off grid inverter with up to 12,500W maximum PV input | 1 |
| Battery Storage | US5000C lithium batteries installed in a black server cabinet, providing 20kWh total energy storage | 4 |
| DC Power Cables | Red and black 6mm² solar DC cables, 25 metres total length | 1 set |
| Battery Protection | MERSEN fuse disconnector fitted with 250A fuses for battery protection | 1 |
| BMS and Battery Cables | Complete set of BMS communication cables and heavy duty battery power cables | 1 set |
| DC Distribution | Lynx Power In distributor for safe and organised DC power distribution | 1 |
| System Monitoring | Solar Assistant online monitoring platform for live system performance and energy tracking | 1 |
| PV Combiner Box | Solar PV combiner box with 4 inputs and 4 outputs, pre-configured and ready for future expansion | 1 |
| Mounting System | Mounting kit suitable for ground installation or flat roof applications | 1 set |
Specifications
xElectrical Specifications of the MAX-III 11kW Conversol Inverter MPPT Charger
| Model | Axpert MAX III Off-Grid Inverter |
| Rated Inverter Power | 11000 VA / 11000 W |
| Parallel Capability | Yes, up to 6 units |
| Input Voltage | 230 VAC |
| Selectable Voltage Range | 170 to 280 VAC (Computers), 90 to 280 VAC (Home Appliances) |
| Input Frequency Range | 50 Hz / 60 Hz automatic sensing |
| AC Output Voltage Regulation | 230 VAC ± 5% (Battery mode) |
| Surge Power | 22000 VA |
| Peak Efficiency | 93 percent |
| Transfer Time | 10 ms for computers, 20 ms for home appliances |
| Output Waveform | Pure sine wave |
| No Load Power Consumption | Less than 75 W |
| Battery Voltage | 48 VDC |
| Floating Charge Voltage | 54 VDC |
| Overcharge Protection | 66 VDC |
| Solar Charger Type | MPPT |
| Maximum PV Array Power | 12000 W (6000 W x 2 MPPT) |
| MPPT Operating Voltage Range | 90 to 450 VDC |
| Maximum PV Open Circuit Voltage | 500 VDC |
| Maximum PV Input Current | 27 A x 2 (maximum 40 A) |
| Maximum Solar Charge Current | 150 A |
| Maximum AC Charge Current | 150 A |
| Total Maximum Charge Current | 150 A |
| Dimensions | 176.3 x 432.4 x 687 mm |
| Net Weight | 30 kg |
| Communication Interfaces | USB, RS232, RS485, Wi-Fi, dry contact |
| Operating Humidity | 5% to 95% relative humidity, non condensing |
| Operating Temperature | -10°C to 50°C |
| Storage Temperature | -15°C to 60°C |
| Compliance and Standards | IEC 62109, IEC 61683, EN/IEC 61000-6-2, 61000-6-4, 61000-3-11, 61000-3-12 |
Return Policy
xWe offer a 14-day, no-quibble returns or replacement policy because we want you to be totally satisfied with your purchase.
If you are unhappy in any way with your purchase, you can return it for a refund or a replacement, as long as you return it in the same condition as it arrived (original/undamaged packaging and product) and within 30 days of receiving it. We will pay for your return postage on a faulty item as long as you send it using Royal Mail 2nd class recorded delivery (for EU or International Shipments, you have to use our UPS account, we will provide you with a return label)
Please keep in mind the following:
- Non-faulty items returned after 14 days and/or not in their original, undamaged packaging can only be exchanged for store credit - 15% off the items returned.
- Items returned within 14 days but not in their original and undamaged packaging will also incur a -15% charge per package.
- If you return an item that doesn't adhere to our returns procedure or doesn't include a returns form, you may be liable for a £10 administration fee
- Individual items from a bundle can't be returned, refunded or exchanged. If you want a refund/credit/exchange for a bundle, all items must be returned to us.
Before you return your item, please make sure that:
- You follow our returns process (outlined below)
- The goods and packaging are undamaged
IMPORTANT: We need to be able to identify an item with your order. We can only do this if you follow our returns process. Please do not send us items back that do not follow this process as they cannot be identified properly and will not be replaced or refunded.
What delivery method do I need to use when returning an item?
You must send the goods back to us via Royal Mail 2nd class recorded delivery. Refunds on faulty items returned are reimbursed within 5 working days.
Can I return just one item from multiple purchases?
Yes. Once you start the returns process you will go to a page that will allow you to choose which items you want to be replaced or refunded.
Returning faulty goods
If your item is faulty, you need to follow the returns policy, where you will be able to state that it’s faulty. The product will then arrive at our warehouse for testing.
If your purchase is not within 14 days
You can still exchange your item for a different product or for credit to use on the Voltacon Solar or Ledison-led-lights.co.uk websites (-15% from the credit amount).
Returns outside of the 14-day period do not qualify for the free returns policy.
Returning an item within the warranty
If you have a warranty and want to return a faulty item, you just need to follow our standard returns process. When we receive your item, we will then check that it’s within warranty and for any faults before arranging a replacement.