Solar system design help for remote research station on the Equator
First post here. I must start by saying we are a group of biologists/ecologists who have been able to figure out how to get a very remote research site functioning with clean water, composting toilets, and a minimal hydropower system. But we are not electricians. I have been doing a lot of research as we need to increase our power availability. I really need some help to figure out the details. We are located on the coast of Ecuador basically at 0 degrees latitude. In the dry season we have a lot of overcast days but it is still bright and during the wet season it may rain for a day or two and then be full sun for a day or two or several.
Being an NGO I have managed to obtain a donation of a few components to begin building our system. To start, here is what we have been given:
AIMS Power SCC60AMPPT, 60 Amp Solar Charge Controller 12/24/36/48V
AIMS Power 1500 Watt 24 Volt Pure Sine Power Inverter
2 - bayite DC 6.5-100V 0-100A LCD Display Digital Current Voltage Power Energy Meter
Based on my research I believe we should build a 24V system. We want to be able to power some lights, wifi router, charge a couple laptops (1 or 2 at a time), USB devices (phones/tablets), charge a mix of batteries (AAA, AA, cameras, drone, etc.), and run a 24V fridge/freezer (eventually). We plan to purchase the rest of our items in Ecuador or go to Colombia to get it. I’ve found a company here where we can get most everything. Here is my current hardware plan with eventual upgrades in parentheses. We will not have the 24V fridge/freezer to start.
2 - 350W/24V/9.04A pollicrystaline solar panels (upgrade to 4 total)
4 - 150Ah/12V SBB Gel batteries (upgrade to 6 or 8 total)
(eventually add another 24V 1500-2000 Watt inverter)
My plan was to wire our first two panels in series for [email protected] (700W) and then eventually (or if we have enough $ initially) add two more panels in series and parallel with first set for [email protected] (1400W). With the 4 batteries (maybe 6 to start) the plan was to wire in series/parallel to create 24V/300Ah battery bank (24V 450Ah w/6). Eventually add pairs of batteries to increase battery bank size 150Ah per pair. My plan was to also hook up a battery charger on a timer from our 120V/300 Watt hydro generator to charge the battery bank at night if needed. I would have another timer on the hydro system to run a water heating element in a barrel during the day. It would be nice to at least have some warmer water in the shower.
Hopefully I haven’t committed any gross negligence in my research and design of this system so far. I know you will let me know if I did! But I sincerely appreciate any and all help/recommendations.