Home Battery Storage System

Home Battery Storage System

If you want to scan a quick comparison of ITS Technologies Home Battery Storage System solutions on offer featuring Sunsynk packages see below: 

 

Sunsynk 3.6–8 kW Hybrid Systems (Single‑Phase)*

  • Price: From about £3,205 (inc. VAT), averaging £275/kW
  • Inverter options: 3.6, 5, or 8 kW single-phase hybrid inverters
  • Battery: 10.24 kWh GSL PowerWall
  • Highlights:
    • Dual MPPT design, lithium-ion or lead-acid compatibility, fan-less IP65 outdoor use
    • Supports 150 % PV oversizing
    • Remote updates, auto grid/off-grid switching, integrates with Octopus Agile/Flux tariffs
    • Connect up to 16 units in parallel 

Sunsynk 8–12 kW Hybrid Systems (Three‑Phase)*

  • Price: From about £5,810 (inc. VAT), averaging £292/kW
  • Inverter size: 8 kW three-phase hybrid inverter
  • Battery: 10.24 kWh GSL PowerWall
  • Highlights:
    • Handles multi-phase residential/commercial loads
    • Can manage solar, grid & generator powerflows
    • Octopus tariff compatibility and energy usage reporting
    • Parallel up to 16 inverters 

Sunsynk Lifelynk X + XL (3.84–21.16 kWh LiFePO₄)*

  • Price: From about £2,890 (inc. VAT), averaging £371/kW
  • System: 3.6 kW inverter built into LiFePO₄ battery unit
  • Battery capacity: 3.84 kWh base, expandable via add-on packs
  • Highlights:
    • All-in-one plug-and-play design for retrofits
    • EPS option for essential load backup
    • Scalable and remote firmware updatable
    • Octopus tariff support 

Sunsynk L5.3 / W5.3 Battery Systems (5.32 kWh)*

  • Price: From about £3,540–3,535 (inc. VAT), averaging £361–379/kW
  • Battery type: LiFePO₄, IP65 rated, 6000+ cycles, wall/outdoor install
  • Highlights:
    • L5.3: standard LiFePO₄, 10 yr warranty with inverter (5 yr standalone)
    • W5.3: low-temperature capable (charge –10 °C / discharge –20 °C), built-in MCB
    • Expandable up to 10.64 kWh, 32 units in parallel

Key Advantages of Sunsynk Packages

Full Integration - Inverter, battery, & grid connection installed and certified (MCS/DNO)

Tariff Optimisation - Built-in API for Octopus smart tariffs; charge/discharge profiling to lower electricity costs

Scalability - Options for stacked batteries and parallel inverters — your system can grow with your needs

Outdoor Ready -All components rated IP65 for indoor/outdoor installation

Backup -Supports Essential Power Supply (EPS), fast switching during outages

Remote Monitoring -Full remote control via the Sunsynk Connect app (real-time stats, updates, energy reports

 

Which Package Suits You?

  • For standard homes: The 3.6–8 kW single-phase hybrid with 10 kWh battery delivers balanced performance.

  • Growing households or light commercial sites: Opt for the 3‑phase 8 kW hybrid version.

  • Need compact or retrofit solution: Lifelynk X all-in-one unit is ideal for smaller properties or tight space.

  • Cold climates: Consider the W5.3 battery for sub-zero operations.

  • Highest reliability: Expandable LiFePO₄ units (L5.3/W5.3) offer longevity with 6000+ cycles and strong warranty.

Advantages of Home Battery Storage Without Solar

Reduced Upfront Complexity & Cost

Simplified installation: You skip roof-mounted panels, avoid complex construction and lengthy installation timelines. Installation typically does not take more than a day.

Lower initial costs: You avoid panel costs, brackets, or permissions, making battery-only systems more accessible.

Energy Bill Savings through Time-of-Use Optimization

Charge low, discharge high: Ideal for homes on time-of-use tariffs—charge during cheap hours and use during peak times. UK homeowners can shave significant pounds from their billsglowgreenltd.com.

Backup Power for Outages

Instant resilience: A battery-only setup offers immediate backup during power failures making it an ideal solution in challenging weather conditions 

Grid & Carbon Benefits

Grid relief: By using your stored power during peak hours, alleviates the burden placed on your local grid supplied.

Lower emissions

By using your energy during off-peak hours in an optimal way, you are actually reducing emissions compared to peak hours 

No Roof - No Problem

If your home cannot accommodate panels due to shading, lease restrictions, planning constraints, or roof unsuitability, a battery-only system becomes an attractive alternative.

Disadvantages to Consider

Ongoing Grid Dependency

If you charge only from the grid, you are dependent on your supplier's electricity prices.

Reduced Cost-Savings vs. Solar + Battery

Of course a standalone battery is not in the same category as solar energy. A solar and battery set up will offer a better return.

Limited Storage Duration

If the battery runs out during an extended outage, your save energy will eventually run out

High Upfront Expense for Limited Benefit

Currently UK costs are around £4,500.

Battery Lifecycle & Environmental Impact

The life of a battery does degrade over time (typically 10–15 years for Li‑ion).

Disposing of a battery is environmentally concerning. 

In Summation:

Aspect

Battery only

Solar and Battery

Upfront cost

Lower (no panels)

 Higher

Installation 

1 - 2 days

Complex 4-5 days

Energy Independence

Partial (peak shifted grid energy)

High (sun and stored energy)

Cost Savings

Via tariffs

Bill reduction (storage and export revenue)

Backup Power

Effective for outages 

Excellent - can be recharged when sun is out

Environmental Impact

Limited (grid based) 

 Significant (renewable energy displacement)

System Longevity

10 - 15 years battery life

Battery + 25 year panel lifespan

Grid Benefits

Peak demand reduction

Grid support and export capability 

 

In Summation

Home battery systems without solar panels do offer a mix of energy resilience and cost flexibility. They’re simpler, space-efficient, and enable smart tariff-based savings. However, for long term cost reduction, they are less effective but you will still a difference to your electric bill. If your priority is backup and outage protection, or you're restricted from using solar, a battery‑only system is well worth considering. If your goals include bill reduction, carbon footprint reduction, and maximum energy autonomy, investing in solar panels with integrated battery storage remains the superior long-term strategy if you have the flexibility.

* = prices per published date, subject to change

Nationwide UK Delivery

Expert system advice

Trade Prices & volume discounts

Visa Mastercard Maestro JCB Google Pay Shop Pay