Since leaving the wet dock we have spent a few days at Tixall Wide.
I tilted the solar panels for the first time since they were fitted eight years ago. From March to October, the sun gets high early enough that the panels always get the leisure batteries up to 100% charge each day without inclining them, the hook up in the marina combined with a Mastervolt charger looks after the batteries during winter.
Tilting them towards the low sun today increased the input from 5amp to 12amp - quite a difference.
The panels are 125W each which is quite small watts compared to new panels of the same dimensions that are on the market today, the five 135amp leisure batteries are six years old, cheap Albion wet sealed units that appear to be as good today as the day they were fitted. They are around the 12.8-volt mark (give or take 0.1 of a volt) first thing in the morning.
I don't use an expensive MPPT controller but a PWM which is supposedly 30% less efficient but more reliable (old tech) and maybe kinder to the batteries.
In Shugborough Estate |
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