As with any off-grid energy system, Umukuri's is a balancing act between consumption and generation. There are many electricity management factors to consider.
The over-riding principle is the batteries should never be depleted below 70% capacity. The batteries are the most expensive component and preserving their operational lifespan is in Umukuri's pecuniary interest.
In purely cost/benefit terms, it will always be sensible connecting the Petrol Generator to meet energy consumption requirements if the batteries are approaching 70% capacity (30% depletion.)
Depth of Discharge (DOD) cycle count for our Lead Carbon batteries according to the manufacturer: 1500 cycles at 100% Discharge capacity 2400 cycles at 80% Discharge capacity 3000 cycles at 60% Discharge capacity 3600 cycles at 50% Discharge capacity
Another factor to consider is that Umukuri typically harvests a lot more energy than it can store. On a sunny day in summer the battery bank typically reaches 100% charge by about 10 a.m., meaning the eight or so remaining sunshine hours for the day are wasted. It makes sense to operate energy hungry devices such as the Vacuum Cleaner, Clothes Dryer, Toaster, Electric Kettle and Washing Machine during the day to make use of this energy which would otherwise be harvested but unused.
|Simon Anderson||Nerdemail@example.com||021 891 826|
|Mark Denize||Maintenance and firstname.lastname@example.org||(03) 579 9220||021 469 220|