Description
xMersen 250A Battery Fuses and DC Disconnector – NH00 High Current Protection
This Mersen fuse and disconnector set provides essential overcurrent protection and isolation between the battery bank and inverter in off-grid and hybrid solar systems. The NH00 gL/gG fuses are rated for high continuous DC currents and are suitable for protecting lithium and lead-acid batteries in systems from 8kW upwards. The 250A disconnector allows safe isolation of the battery bank during maintenance or in an emergency.
Key Features
- 2x Mersen NH00 gL/gG DC fuses (200A or 250A, one for positive and one for negative battery pole)
- 1x 250A DC disconnector (isolator)
- Fuse enclosure included
- Suitable for lithium-ion and lead-acid battery banks
- Designed for high continuous discharge currents in solar inverter applications
- Suitable for inverters rated 8kW, 10kW, 11kW and above
Product Overview
In any off-grid or hybrid solar system, the cable between the battery bank and the inverter carries the highest continuous current in the installation. Correctly rated fuses on both the positive and negative conductors protect the battery bank and cabling against short-circuit and overcurrent faults. The DC disconnector allows the battery bank to be safely isolated from the inverter without needing to disconnect individual battery terminals, reducing the risk of arcing and electric shock during maintenance.
The NH00 fuse format is a standard industrial cartridge type widely used in European solar and energy storage installations. The enclosure and disconnector are designed to work together as a compact protection and isolation assembly, suitable for wall mounting in a plant room or electrical cabinet.
What Is Included
- 1x Fuse enclosure
- 2x Mersen NH00 gL/gG DC fuses (200A and 250A available, one for positive, one for negative)
- 1x 250A DC disconnector
- 1x Installation instructions
Applications
- Battery overcurrent protection in off-grid solar systems
- Hybrid inverter battery isolation and protection
- High current DC protection for inverters rated 8kW and above
- Lithium and lead-acid battery bank installations
Installation and Safety Notes
This protection assembly must be installed by a qualified electrician. DC circuits in solar battery systems carry dangerous voltages and high fault currents. Fuse selection must be matched to the cable rating and the maximum discharge current of the battery bank. Always isolate all power sources before working on DC connections. Install in accordance with IET Wiring Regulations and the inverter and battery manufacturers' guidelines.
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:
- 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.