Off-Grid Systems

Battery Systems

We offer bespoke system design to suit your needs.  Starting with your energy requirements, we design a system that can deliver the required peak output with the correct storage capacity to suit the charging source.

Lead acid batteries require a multi-stage charging process starting with a bulk charge and finishing off with a float charge.  This means a diesel engine may end up running for hours while only trickling power into the float stage of a charge cycle.  Paring renewable energy charging sources with lead-acid batteries works well.  

An alternative that we offer is Lithium type battery packs.  Lithium batteries are used widely in electric cars, drills, garden battery operated tools etc...  Although the World's battery demand has increased, the manufacturing processes have been refined resulting in stable prices.


Lithium (LiFe4) Battery System

lithium technology is the new battery type used in home and business energy storage systems.  Lithium systems have a higher energy density, do not vent gasses, do not get hot and have a good round-trip efficiency (charge/discharge cycle).  Another feature of the Lithium batteries is that they have up to 6600 charge cycles lifespan.  This is more than double a lead acid battery bank.

As a rule of thumb a lead acid battery bank can be discharged to 50% before requiring a recharge.  Compared to Lithium batteries, which can be discharged to around 90% depth of discharge.  Lead acid batteries are still around half the price of lithium when comparing usable storage.

Lead acid battery bank (48V)

6kW, 980Ah (48V)

12kW, 1200Ah (48V) powering a remote property that's completely off-grid

Lead acid battery bank.  Installed in a remote YHA

6kW, 800Ah (48V), powering a remote YHA

6kW, 1100Ah (48V). North Scotland

North East England

North East England

North England

6kW, 1000Ah (48V)

Lithium Battery 

20kW, 60kWh

Lithium Battery pack 20kW, 30kWh

8kW, 15.8kWh (pre commission)

10kW, 30.8kWh, 10kW PV.

10kW, 30.8kWh (53V)

20kW, 30.8kWh, 20kW PV

8kW, 15.4kWh (53V)

10kW, 30kWh, 3.6kW PV, 6kW wind