Not sure choosing your system according to a particular MPPT is wise.
The main system consideration should be the capacity of your storage and the voltage that you have chosen now, or may change to in the future.
With a large system like 2Kw you would save money by using a higher voltage battery system (36 or 48 volts) and using serial (with your 100watt panels) and perhaps in conjunction with parallel connections. This is quite simple as you choose the configuration according to the panel voltages to match the specifications of the mppt, normally 150vDC(avoid having a voltage to close to the maximum especially if visiting the tropics) input voltage (minus a safe working limit) determines how many panels you connect in series and the capacity of the MPPT determines how many parallel connections you can have in total per controller.
On this subject it begs the question why you are choosing 100watt panels when the price per watt is normally much lower on full size panels 200-300+ watts given that money is your object?
Using a higher voltage storage system gives you the option of greater efficiency and greatly reduced cost of the controller/wiring/inverter/battery monitor/shorepower/dc regulator/dc-dc converter etc.
Conversely getting the most value from batteries involves having the largest cell sizes that you can given the required capacity but this works contrary to system voltage efficiency which is why there will never be a single answer as higher voltage efficiency reduces battery cell size efficiency, given equal system capacity.
Choosing one or more MPPT will fundamentally depend on whether your solar panels are identical or not as the input to the controller should be identical otherwise multiple controllers should be employed.
Posted by: jennifer_c_richards@yahoo.co.uk
| Reply via web post | • | Reply to sender | • | Reply to group | • | Start a New Topic | • | Messages in this topic (21) |
No comments:
Post a Comment