BENEFITS OF GENERATING AND STORING RENEWABLE SOLAR ENERGY

How we calculate your savings from installing solar and smart battery


At Moixa, we want to help our customers get the most out of their batteries, so they can power their homes from greener and cheaper energy. Solar panels generate renewable energy during the day that supplies electricity to the home, reducing the need to buy electricity from the grid and thus lowering energy bills.

With energy prices on the rise, it makes sense to use as much of the free electricity your solar panels are generating as possible and solar battery storage makes this possible. The excess energy your home is not currently using goes into charging your battery, so instead of sending the excess electricity back to the grid, you can store it and power your home from the sun after it goes down, further improving the savings.

To achieve these savings, Moixa optimised smart battery systems monitor your household energy consumption and solar generation in order to best respond to your particular energy needs and maximise solar self-consumption. See our year one step by step savings breakdown for households who install 4kWp solar panels and 4.8kWh battery storage.

YEAR ONE SAVINGS FOR BATTERY ONLY INSTALLATIONS

Your bill reduction with a 4.8kWh Moixa Smart Battery added to your solar panels.

25% Bill Reduction50% Bill Reduction80% Bill ReductionDescription
Battery AssumptionsBattery Storage Capacity (kWh)4.84.84.8Total battery capacity
Battery Usable Capacity (kWh)4.324.324.32Total usable battery capacity (90% depth of discharge)
Full Battery Cycles (Cycles/y)115230365Total full battery cycles per year – can include cumulation of partial cycles
Energy Used From Battery (kWh/y)4979941577Total amount of energy stored and consumed from the battery per year
Before BatteryExisting Annual Household Consumption  (kWh/y)200020002000Existing annual household grid consumption (without battery)
Electricity Rate (pence/kWh)16.416.416.4Price paid per unit (kWh) for grid electricity
Existing Energy Bill (£/y)328328328Existing annual electricity bill
After BatteryNew Annual Household Consumption (kWh/y)15031006423New annual household grid consumption (with battery)
New Energy Bill (£/y)24716569New annual electricity bill
Reduction on existing bill (£/y)81163259Amount saved on electricity bill
Additional BenefitGridShare membership (£/y)505050Additional GridShare membership benefit (year 1-3) not included in any of the above calculations

 

Assumptions & notes:

  • Assumes all household energy consumption is electric
  • Assumes energy rate is 16.4p (average price per kWh for 2019)
  • Assumes existing household grid consumption is 2000kWh/y
  • Bill reduction % are approximates and rounded figures

YEAR ONE SOLAR & SMART BATTERY SAVINGS

Bill reduction with 4kWp of solar PV and a 4.8kWh Moixa Smart Battery

40% Bill Reduction50% Bill Reduction75% Bill Reduction
Solar & Battery  AssumptionsAnnual Solar Generation (kWh/y)380038003800Annual amount of energy produced by solar
Solar Generation Consumed by House (%)353535% of annual solar generation consumed directly by the household
Solar Generation Consumed by House (kWh/y)133013301330Total kWh of annual solar generation consumed directly by the household
Spare PV (kWh/y)247024702470Total kWh of annual solar generation not directly consumed by the household
Battery Storage Capacity (kWh)4.84.84.8Total battery capacity
Battery Usable Capacity (kWh)4.324.324.32Total usable battery capacity (90% depth of discharge)
Full Battery Cycles (Cycles/y)60155365Total full battery cycles per year – can include cumulation of partial cycles
Energy Used From Battery (kWh/y)2596701577Total amount of energy stored and consumed from the battery per year
Exported PV (kWh/y)22111800893Total amount of solar generation exported back to the grid – not consumed directly by household or stored in battery
Before Solar & BatteryExisting Annual Household Consumption (kWh/y)400040004000Existing annual household grid consumption (without battery)
Electricity Rate (pence/kWh)16.416.416.4Price paid per unit (kWh) for grid electricity
Existing Annual Energy Bill (£/y)£656£656£656Existing annual electricity bill
After Solar & BatteryNew Annual Household Consumption (kWh/y)241120001093New annual household grid consumption (with battery)
New Annual Energy Bill (£/y)395328179New annual electricity bill
Reduction on existing bill (£/y)261328477Amount saved on electricity bill
Additional BenefitPV Export (SEG) (£/y)1169447Additional potential earnings if signed up to a Smart Export Guarantee to sell surplus pv generation back to grid
GridShare membership (£/y)505050Additional GridShare membership benefit (year 1-3) not included in any of the above calculations

 

Assumptions & notes:

  • Assumes all household energy consumption is electric
  • Assumes energy rate is 16.4p (average price per kWh for 2019)
  • Smart Export Guarantee (SEG) – 5.24p. Example rate is based on the previous FIT export rate. Actual SEG rates vary among SEG providers. The potential SEG earning shown above have not been included in our bill reduction calculations.
  • Existing Household Consumption – 4000kWh is based on the Ofgem publicly available facts and figures on annual electricity usage in the UK.
  • Yield – 950kK is an average that can be achieved by a mixture of different locations, roof slopes, and roof orientations, based on MCS irradiance datasets. There are multiple combinations that could achieve a 950kK yield, For example, A south facing roof in London with a 20-degree roof slope. Or an east/west facing roof in Brighton with a 15-degree roof slope.

PLEASE NOTE

Bill reduction % are approximates and rounded figures.
Savings may vary if the customer is on time-of-use tariff and has their battery optimised via a personalised charging plan.
Information is accurate on the date of publication.