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  1. M

    24v 280Ah v 24v 100Ah

    AH (Amp Hour) is a measure of storage capacity, not current (amp) draw as you seem to be thinking. Max Amp draw is usually a factor of the capacity "C" a 100 AH battery with a C rate of .5 should not be used to output more than 50 amps, but with a C rate of 3 could output 300 amps, for only a...
  2. M

    Cheep easy way to insulate a shipping containers

    I looked up the price after posting that and was shocked. I would consider DIY, that yellow core looks like it is made of alternating directions of cloroplast, a 4x8 sheet costs around $20 at home depot and could make a core 1 foot square and 5 inch thick.
  3. M

    Cheep easy way to insulate a shipping containers

    You might want to look for a "heat recovery ventilator" to exchange air without losing as much heat. Edit: Added DavidPoz video
  4. M

    growatt 3kw Helppp...?

    Without more detail, it is hard to be more specific than check your connections, circuit breakers and fuses. https://bigbattery.com/product/24v-lifepo4-power-wall/ If this is the one it has two on the inside and one on the outside.
  5. M

    DIY Soft Start

    I saw this video of a DIY soft start that should work with any inverter. Here are more sizes of the limiter to tailor to the needs of your device. https://www.digikey.com/en/products/filter/inrush-current-limiters-icl/151?s=N4IgTCBcDaIM4BswQLoF8g
  6. M

    Lion Energy UT1300 at Costco again, why buy them?

    https://www.pveducation.org/pvcdrom/batteries/lead-acid-batteries section 5.3.2 Battery Lifetime If you are using 80% of your lead-acid battery it will not last long.
  7. M

    My adventures building a Zinc-Bromine battery

    @Juptron danielfp248 is trying to make a more energy dense version, and is aware of Robert see the third post on this thread. https://diysolarforum.com/threads/my-adventures-building-a-zinc-bromine-battery.11910/#post-132445
  8. M

    How to store flooded lead acid batteries for 2+ years

    Cody's Lab says you can drain the acid and store the battery for years.
  9. M

    LiFePo Budget Battery Recommendation

    That is too bad, I have 6 I hoped this would be a case that would hold all of them. Thanks for checking.
  10. M

    LiFePo Budget Battery Recommendation

    @David Smelser Looks like you could fit 6 of those Miady batteries in one of those boxes without the fuse box and 12V socket, could you measure for me? Thanks.
  11. M

    Battery storage over winter and water level drop

    I had not seen this technique in this forum yet, The OP now knows it is an option and can make their own decision.
  12. M

    Battery storage over winter and water level drop

    Cody's Lab in storing a starting battery fully charged it then drained the acid and stored it separately. He claimed it can then be stored for years without being damaged.
  13. M

    How come nobody has attempted to replace their car battery yet?

    You can use capacitors and a small lithium for a starter battery. https://diysolarforum.com/threads/is-it-possible.12589/#post-141036 Edited
  14. M

    Is it possible?

    I have seen videos of a super capacitor bank connected to a small battery to start a car. Here are a couple examples. https://www.youtube.com/playlist?list=PLZh_n9jIHntssGtG4j5yMrm4NPTZVS_iH
  15. M

    My adventures building a Zinc-Bromine battery

    Have you seen the videos by Robert Murray-Smith on this type of battery? Make Cell Make Electrolyte
  16. M

    Charge 12V from 24V battery

    I have a SLA 55Ah to run a CPAP overnight in case of a power outage. I currently keep it on a wall float charger and disconnect it and move it when I want to use it. I have a controller and 400 watts of solar that can recharge that battery in a couple hours. I was thinking of getting a 24 volt...
  17. M

    LIFEPO4 battery prices rising/stuck?

    I don't need 48V and don't want to break the pack. Also needs a BMS. 5kWh <$1000 https://www.ebay.com/itm/48v-NEC-A123-system-LifePo4-5-kWh-120-Ah-Battery-Golf-Cart-RV-Solar-Storage/143476089142?hash=item2167d76136:g:04MAAOSwOX1eARmK&autorefresh=true
  18. M

    Charge 12V from 24V battery

    MisterSandals, that is a nice charger.
  19. M

    Charge 12V from 24V battery

    kernel Thanks for finding that. I was looking for something with fewer features. What would happen of you connected the panel input of a cheap PWM charge controller to the 24V battery?
  20. M

    Charge 12V from 24V battery

    I know about the battery Isolators, that Will has on his site, but they all seem to be 12V to 12V. https://www.mobile-solarpower.com/battery-isolators.html I could use a 24V to 12V converter, to feed the battery isolator. $140 - $200 Or an inverter to a normal 12V battery charger. As low as $50...
  21. M

    145 Watt 3x4 Panels

    I agree if they can be picked up locally to me I would buy a couple.
  22. M

    $7 MPPT Too good to be true?

    https://www.amazon.com/Battery-Controller-CreazyMPPT-Regulator-Tracking/dp/B07S9RDFQH/ref=sr_1_52?keywords=mppt%2Bsolar%2Bcharge%2Bcontroller&qid=1583366631&sr=8-52&th=1
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