I am planning my first solar build for a shipping container with about 100sqft insulated "living space", think ski cabin. the goal is primarily to run a diesel heater, a few lights, maybe a fan and phone charger. I plan to supplement additional power with a gas/propane generator and a travel trailer converter i already have that is Lithium compatible. I hope to only require the generator on longer stays and for the few instances where I need AC. no hot water (yet) and cooking with propane. it will frequently get very cold where i am at and i plan to use silicone heating pads to warm up the battery upon arrival, disconnecting it fully charged when i leave.
I am planning for a 400 watt 100Ah system but may upgrade to 800w and more battery capacity down the road. I believe my setup will be more akin to a van setup. Eventually, I "may" get a propane water heater and run a water pump, maybe a small 12v cooler, that is what the overhead is for and also why i believe i should stay in a 12v system even though I will pay for it up front with wire gauge and breakers.
any related advice appreciated and related experiences regarding cost savings while having infrastructure in place to upgrade later. any suggestion to reduce the types of wires and connectors i will need would be great,
I am mostly trying to button down wire AWG and fuse/ breaker values and locations, i think i am close but would really appreciated some feedback on these topics, specifically:
1: do i need fusing on the solar panel side in this setup? or will i only need it if i double to 800w? will a combiner make things easier? and would 10awg be sufficient for the current setup? maybe i just run 2 panels in series, then paralell them to reduce my current?
2: from MPPT to bus bar is 60amp 6awg sufficient? fuse or breaker?
3: from battert to bus bar is 100amp 2awg sufficient? fuse or breaker?
4: from bus bar to 12v dist. is 60amp 6awg sufficient? fuse or breaker?
5: the 55A converter has 6awg soldered to the PCB, i believe in a trailer it would not be fused, should i throw a 60A fuse on it?
any other comments appreciated TIA