OPS300 Specifications

Model: OPS300

Voltage: 12v nominal (approx 13.5v charged & rested)

Capacity: 304AH

Max Discharge: 200A 

Max Charge: 200A

Temperature: 5°C min (charge), -40°C min (discharge)

Weight: 25kg

Dimensions: 375mm X 270mm X 190mm

Other Details

The manufacturer of the battery cells used in this battery (EVE) has stated that they are 280ah and based on our capacity testing, we can confirm this. They achieved slightly above 300ah, so we’re very happy with their performance based on our testing.

Here are some details of the testing we performed on these cells:

• Assembled battery tested to 311ah at a low C-rate of 30a using conservative settings on BMS (so the battery will last longer).

• Assembled battery tested to 308ah at a high C-rate of 160a

• Individual cells tested to 309ah to 311ah with cutoff at 2.5v (charged to 3.65v)

• Terminal and busbar temperature rose to a maximum of 40°C when run at a high C-rate for 1.75 hours. That is about 20°C above ambient and very impressive.

The cells were manufactured by EVE, which is a very reputable manufacturer.

They are grade A and are brand new.

Our technical team has fully top-balanced the cells to 3.65v.

The cells are compressed to an optimal pressure using fibre tape with a plywood outer on either side of the battery bank, to ensure that we get the most life out of them. Compression results in reduced delamination of the internal electrodes and less stress on the terminals.

The battery is built using a 200A JK Battery Management System (BMS) with active balancing & Bluetooth connectivity. There is a free app for both iOS and Android. The BMS protects the battery from charging too much or running down too much, and also protects against charging when too cold (less than 5°C). It also balances the cells and keeps them around the same voltage.

The BMS has conservative settings to make the cells last longer:

• 3.65v High Voltage Disconnect

• 2.5v Low Voltage Disconnect

At these settings, and because of the compression, we’d expect around 3500 cycles. This battery would last an average user a lifetime. It would last a full-time off-grid user ten years (charged every day).

This battery will give you the equivalent performance of at least four (if not five) conventional lead-acid 100ah batteries.

Installation

If you’d like us to install your battery, we’d love to help! If you already have a DC to DC charger in your van or your van electrics are compatible with Lithium, it costs £50 to install a battery at our workshop in Wantage.

If you need a DC to DC charger installed, on average, it costs around £240 (plus the cost of the components) to install this.

Additional Shipping

Please note that our shipping prices do not include local taxes or duties that you may be charged if you are not in the UK.

If your country is not available in the country dropdown when entering your address, please get in touch for a custom shipping quote.

* If you bought one of our first generation Offgrid LiFePO4 batteries with a Daly BMS and are looking to buy another battery to add to your existing one (in parallel), please get in touch with us before you order so we know and can build your new battery with a Daly BMS to match your existing battery. *