Hello to all on the forum!
I am working on sizing a small 24V system for my cabin in Hawaii and would really appreciate some input from more knowledgeable individuals! I am a total rookie when it comes to electrical/renewable energy but after reading through the forums and websites through the last year I believe I am starting to get a grasp on the different components I will need. Any advice would be much appreciated!
The specs- 400 sq. foot cabin, 4-6 hours of sun, 24V system, 2 small chest freezers (one with fridge conversion), LED lights, 24V Flojet variable speed pump from catchment tank, phone/ comp charging, ipod player, compost toilet fan.
The loads- From my calculations with Kill-a-Watt I'll be squeaking by using 1400-1500 watt hours per day. Both the fridge and freezer pull 70 watts on start up from what I can tell and the pump will be around 144 watts.
The system- After speaking to a few Off Grid suppliers today this is my tentative component list. I am planning on over-sizing a bit on panels and batteries and possibly on the inverter to leave room for growth later.
Thanks in advance to anyone who can help me understand this a little better! I feel pretty good about it but have no idea really. On a positive note a pro electrician friend will be helping me set it up.
Aloha!
I am working on sizing a small 24V system for my cabin in Hawaii and would really appreciate some input from more knowledgeable individuals! I am a total rookie when it comes to electrical/renewable energy but after reading through the forums and websites through the last year I believe I am starting to get a grasp on the different components I will need. Any advice would be much appreciated!
The specs- 400 sq. foot cabin, 4-6 hours of sun, 24V system, 2 small chest freezers (one with fridge conversion), LED lights, 24V Flojet variable speed pump from catchment tank, phone/ comp charging, ipod player, compost toilet fan.
The loads- From my calculations with Kill-a-Watt I'll be squeaking by using 1400-1500 watt hours per day. Both the fridge and freezer pull 70 watts on start up from what I can tell and the pump will be around 144 watts.
The system- After speaking to a few Off Grid suppliers today this is my tentative component list. I am planning on over-sizing a bit on panels and batteries and possibly on the inverter to leave room for growth later.
- 4 Renogy 150W panels wired in series. Vmp- 17.9 Imp- 8.38
- 10 awg MC4 wires 75-100 feet to CC.
- Midnite Solar KID 30A Charge Controller. Max 150V input.
- 4 Costco 6V Golf Cart batteries wired in series. Should be around 200AH from what I can tell but having difficulty here.
- Samlex 24V 600 watt Pure Sine inverter. I am thinking about bumping this up to a Xantrex PROsine 1800 watt for future growth (and energy efficient search mode) but based on posts on here I have read that the inverter should be roughly same size as panel array V.
- Fuses and Breakers- This is where I am mostly in the dark.. fuses on positive wires from panels to CC, CC to Batteries, Batteries to Inverter, Breaker or fuse from Inverter to AC Panel??
Thanks in advance to anyone who can help me understand this a little better! I feel pretty good about it but have no idea really. On a positive note a pro electrician friend will be helping me set it up.
Aloha!
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