r/diySolar

Hey all,

I'm trying to spec out a small solar system to power a handful of base-load devices (~50w average load) in my local makerspace. Does anyone know of a BMS or charge controller that will charge from solar when it is available, but will automatically charge off mains when the battery voltage is too low? All the devices I'm looking at can be powered off DC, so there's no need for an inverter.

I've found a couple things like the Anker Solix that are capable of this, but they're kinda massive overkill for this application. Some slight overkill wouldn't be too bad as it'd allow us to charge a few laptops as well.

I just finished cycling my 200ah lifepo4 battery and when it finished at 100% it was at 14v. I disconnected the battery and let it sit expecting it was going to start discharging to reach 13.6v but after 10hours it only came down to 13.9v. I can always bleed off the extra voltage but I was wondering why this happened. I discharged it to cutoff voltage and recharged it with my VEVOR 35a lifepo4 charger.

planning a backyard shed setup just for some basic tools and lightnig. dont want to mess with complicated wiring so looking at all in one options. have any of yall integrated these portable power stations into a small solar build before? let me know if it handles continuous loads okay ngl

I have an E Pro camper trailer with a factory solar package. Within the past three weeks I began converting the lead acid battery to a Humsienk 314ah mini (Amazon). The camper is equipped with a WFCO WF-8735-AD convertor. As expected the charger would not auto switch from LA to lithium so I installed the jumper resistor from WFCO and it the went into the blue led lithium mode. Now the battery is installed and when using the shore power the blue tooth App on the battery is giving a "Pack over voltage" alarm. The cells won't balance and one cell is higher than the other 3. I have tried to drop the charge way down on the battery and recharging it using a 1, 2, 5, 10 and 20 amp charger as well as the solar panel on the E Pro camper (factory unit). I can get the battery up to 14.06 vdc (this was the highest on all attempts) however as soon as I try the WFCO it gives the alarm. Looking for help and ideas. I have tried to contact Humsienk by phone, email and through Amazon with no success. I have 10 days before the 30 day Amazon backing expires. All help and comment (both positive and negative) are appreciated, thanks, Mark.

We're looking at adding Anker Solix E10 system to our existing grid-tied solar. Utility companies in Michigan are not very solar friendly, so even though we produced more than we used last month, our bill was still $150. Adding a battery would help offset that. We're very capable of doing this DIY, my question is regarding homeowners insurance in case there is a fire. How have you navigated your homeowners insurance when adding batteries to your solar DIY?

I called our insurance and they said the system would need to be "professionally installed by a licensed contractor." :(

Are the built-in balancers in pre-built batteries like the Eco-worthy 12v 280AH ones decently functional?

I'm gradually turning an old 12v lead-acid based system that was once a burning man project into something more modern. I have a Victron 150/45 MPPT controller, so I could in theory replace the old Pb batteries with these.

I'm mostly wondering:

1. will I need to keep them right at full charge for days at a time for the internal balancer to keep them balanced, vs a DIY build with a more active balancing system?

2. Could I just parallel two of these batteries (using suitable cabling, etc) without problems?

We bought an older small camper van, just has 100W panel and I need to replace the 2 6v AGM batteries as they are dead.

I was looking at my option and seems like there's some cheaper solutions from China (LiFePO4) but I'd like to have something that I don't have to worry about setting my van on fire - those that know their systems better than I do, what should I be looking at without having to upgrade anything?

Hallo All

I'm Italy Based

I've an existing PV with a SUN2000-6 inverter but without High Voltage Battery. I was thinking to buy a low voltage 10-15Kwh battery + hybrid inverter and put it in parallel with the existing one trying to keep the total cost under 1500 €.

is there any such good solution in the market? what products should I check and in which markets/websites?

I've been searching the web for a week now, all I'm looking for is a timer for my pool pump that's run directly off the MPPT from my solar panels. It's a 72v pump. I don't need home automation or anything fancy just a switch so I can control the pump on and off. A programmable one would be a plus so I can turn it on in the morning off in the afternoon and back on in the evening and off again at night. A 110 or 12v etc will not work. Needs to be 72v from what I've learned

Thanks

I'm trying to set up a small system to run the freezer in my garage. I got a 315W panel, the charger and a 1500/3000W inverter.

I'm thinking of getting a 100ah LiFePo4 battery.

Any brand recommendations and places to buy?

I'm in Colorado. Trying to keep it somewhat cheap without getting complete trash.

(The freezer runs at about 110-120W and surges to about 600W at startup)

I’m thinking about getting a kit as soon as the uk gets approved. What I can’t find anywhere is if it’s possible to feed a larger amount of solar into a battery station to run the off grid socket and feed the excess to the house up to the 800w limit at the same time.

For context my idea is this, I’m thinking about putting panels on my pergola. Depending on how I arrange it I could get peak power of 1700-2600w. But, in that scenario I’m probably wanting to run the 1kw portable AC. So in a perfect world I’d like to split the incoming power between the house top up plug and the full power one.

Hopefully that makes sense. Power the plugged in time, any excess charge the battery, if battery full power the house. Those last two swapped at peak times.

Howdy, I've got a server rack that consumes an average of 500w per hour and I'd like to get it off my power bill because it's costing me a bit more than $50/month. I'd like to find the cheapest way to make that happen. My main requirement is this needs to be backed up by the grid. I don't know much here so any help would be useful. I'm in Portland Oregon.