Hey everyone! I'm planning to set up a DIY backup solar power system using a combination of the BLUETTI AC300, two B300K batteries, and seven 400-watt solar panels. I'm trying to confirm if my calculations are on point. My setup would yield a max output of 2800 watts from the panels. I aim to run two 1200-watt arrays plus an additional 400 watts directed into the DC enhancer charger. I'm anticipating an average output of 900, 900, and about 250 watts for each array, enjoying approximately 4 to 5 solid hours of sunlight. This should give me around 2050 watts per array; so, multiplying that by 4 hours, I expect around 8200 watts daily. With two B300K batteries having around 5.6 kWh storage, I think I can manage my light load, which includes some outlets, a fridge, and a few gadgets. Does this all add up, or am I missing something? Also, I'm struggling a bit with measuring the exact load of each breaker—any tips there would be appreciated!
4 Answers
I had a good experience with my AC300 setup last year. While the AC500 gives you more power, I found the AC300 was super quiet and reliable—definitely a solid choice! Based on what you’ve shared, your calculations seem reasonable, and you should expect some variability based on the weather. I suggest adding an extra battery or two to keep your system balanced, especially since a fridge can pull around 1-1.6 kWh daily. If you're unsure about where to plug things, just try to make sure everything meets the voltage requirements—better safe than sorry!
You might want to keep in mind that sun intensity can vary, especially if it’s not direct lighting. Generally, expect your panels to yield around 5 times their wattage as watt-hours, but those calculations assume no obstacles like shadows. It’s crucial to research solar performance tools, such as PVGIS, for a more accurate estimate considering your local weather. Also, running inverters can consume some power on their own, about 1 kWh for a full day of use. Just something to keep in mind!
You might want to reassess your solar to storage ratio; trying to add that seventh panel might not be the best move financially. Also, the daily peak sun hours for your area should account for most of the inefficiencies. Typically, you can expect a system like yours to produce about 4.8 kWh per day with 1200 watts and 4 peak sun hours. The real challenge will be managing your fridge load and the inverter’s power use, so investing in a watt meter could really help you track that!
Hey, could you share the datasheet for your solar panels? Also, I noticed the AC300 seems to be phased out on Bluetti's website—are you sure that’s the model you want to go with? I’m not sure about the DC enhancer charger functioning with the AC300 either, so it’s worth double-checking that too.
I'm considering other options for panels, like the Jinko Eagles or Trina 410s. I've already got the AC300 bought—just a month in, so I'm committed for now! Happy to look into other solutions later.
Thanks for the encouragement! It's great to hear your experience, and I really appreciate the advice.