How can extra Solar Battery save £

Reed_Richards

Magnitio said:

Reed_Richards said:

What you need is enough battery capacity to see you through to the time when you have enough sun to see you through to when your battery starts to recharge from your panels.  And later, enough capacity to see you through from the time when your solar power drops away to the next cheap rate charging period.  So if you save 15p per kWh at present with 4 kWh usable battery capacity you should save 15p x 4 x 2 = 120p per decently sunny day.

That assumes no charge/discharge losses and that you don't get paid for exporting excess solar.

Yes it does.  But those seem to be the same assumptions used by the OP; my main intention was to point out that they could save twice as much as they had estimated.