Having had a cup of tea at 5:30 am because we woke early, come breakfast we had no 240V power – oh well no coffee.
Opps – we had run the batteries flat and the Inverter had powered down as it should. I knew the batteries were low, but declined to run the generator the afternoon before because our neighbours were enjoying the sun and the peace fishing off the bow of their boat, and I thought we would do it today instead, and let them enjoy their afternoon.
We ran 3 cells out of 32 – 100% flat – opps not the best thing to do for longevity, but once in a while is OK with our batteries, but something I intend to ensure does not happen again.
It has given me the chance to check the state of all the cells, and assess the state of balance, and we now have a fully charged battery, and I have lots of measurements for each cell.
I am installing electronics that will monitor the batteries all the time, and will eventually start the genset automatically if they get too flat, but I have not installed that yet – ironically I was going to make a start today. This will also keep an track of exactly how much power we have left.
Normally it is best to keep LiFePO4 batteries between 10% and 90% charged. The normal practise of charging Lead Acid batteries to 100% and float charging them is a really bad thing to do to Lithium Batteries, so I have been very careful not to charge them too much.
Still it has been a nice day – and we have a nice view over the wide’s – with pairs of Geese being very territorial, and chasing the swan away.