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- 27 Jan 2008
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Yesterday for the first time since solar panels fitted with batteries, the battery did not fully discharge before I went on reduced tariff of around 9p a kWh.
Yes produced more than used before, but first time when at midnight I had not gone down to 10% charge, with 3.2 kWh battery.
I suspect I will now see this repeated many times in the summer months, so having more battery capacity will not help.
In heart of Winter the batteries would not charge from solar as solar output to low. So again larger battery capacity would do very little, so in real terms March, April, October, and September are only months were larger batteries will save enough money to be worth while it seems.
But my solar only fitted Sepember and it was Feb before I got split tariff. So for me a little early to judge.
So what do people who have had batteries for longer think, working on a 7 year life, when is it worth increasing capacity?
Yes produced more than used before, but first time when at midnight I had not gone down to 10% charge, with 3.2 kWh battery.
I suspect I will now see this repeated many times in the summer months, so having more battery capacity will not help.
In heart of Winter the batteries would not charge from solar as solar output to low. So again larger battery capacity would do very little, so in real terms March, April, October, and September are only months were larger batteries will save enough money to be worth while it seems.
But my solar only fitted Sepember and it was Feb before I got split tariff. So for me a little early to judge.
So what do people who have had batteries for longer think, working on a 7 year life, when is it worth increasing capacity?