Hey folks, I've been pondering over a project and would love your insight. I have 7 kW of solar panels on my roof paired with a SolarEdge inverter, but I'm currently without any batteries. My home server uses about 220 watt-hours on average, and I'm wondering if it's practical to create a battery system that can charge from a standard 220V outlet and power my server through a multi-socket. I've looked into various battery options out there, but most of the portable ones are overpriced and offer excess capacity I don't need, like 2000 watts. What do you think? Is this a feasible idea? Thanks a lot!
3 Answers
There are definitely a few options that handle around 200 watt-hours per day. For example, Jackery offers some good LiFePO4 models. It's impressive that your server has such low power usage! If it's something like a Raspberry Pi or a really efficient PC, you could consider a DC-DC supply for better battery life. You can also check out DC input ATX supplies, which are handy for setups like yours. Just pair a LiFePO4 battery with a compatible charger and you're set!
You might want to look into a UPS with a larger battery capacity. You could disconnect it from the 220V when you want the server to run solely on battery using a smart socket. You can find second-hand models that may come under $200, which isn't too bad!
I operate my NAS on a 310Ah LiFePO4 battery linked to an Anenji hybrid inverter. I got everything from Aliexpress for around £400, including the necessary cables and breakers.
In Europe, though, it might be pricier for a UPS that can handle 220 watt-hours for 10 hours, like $3000 or something.