Early Retirement Extreme Book by Jacob Lund Fisker

The brand new Early Retirement Extreme book is available from Amazon.

Early Retirement Extreme: A philosophical and practical guide to financial independence by Jacob Lund Fisker.

This book will change your life. Seriously. Read our page about the Early Retirement Extreme book to find out why.

PV Solar Panel Payback Calculator

We've made a PV Solar Panel Payback Calculator which you can use to work out what return you could get by investing in solar panels versus leaving the cash in a savings account.

Here's an example graph for a 3.76kWh system with the following assumptions:
Cost of system = 3.76 x 4000 = £15040
System output: 3008 kWh/year
Tax rate: 40%
Savings rate: 5%
RPI: 3%
Annual increase in elec cost: 6%
Percentage of generated electricity which is used: 50%
Cost of a unit of electricity: 12p
And we'll won't treat the solar panels as an asset (i.e. we'll say they have 100% initial depreciation).

3.76kWp Solar PV Payback

Try the PV Solar Panel Payback Calculator with your figures and see if you can make money.