Quick Circuit Breaker Question
- Thread starter Snubber
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MisterSandals
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2000W / 20V lvd / .85 efficiency = 117A x 1.5 = 176A breaker
chrisski
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Another thing to check with that breaker is to ensure it has a high AIC rating. I went with Class T-FUses because of this, but there are breakers out there that look like they could be rated for what you’re asking. This is one:
One of those is a 175 amp breaker. I considered using these, but saw the price was even more expensive than class t and the mount. I also am not sure what enclosure to use for the breaker, but the guys at Midnite solar are helpful and will answer questions.
One of those is a 175 amp breaker. I considered using these, but saw the price was even more expensive than class t and the mount. I also am not sure what enclosure to use for the breaker, but the guys at Midnite solar are helpful and will answer questions.
Snubber
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Wow. That's a little steep for me. I'll look at the class Ts.
John Frum
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Please don't discharge your battery to 20 volts at any substantial current.
That is an avoidable stressor.
Also you never want the BMS to trip under normal operation and it is very likely to trip if you draw the battery that low.
A decent inverter/charger has a configuration low voltage disconnect.
I suggest you set it to 24 volts.
That is an avoidable stressor.
Also you never want the BMS to trip under normal operation and it is very likely to trip if you draw the battery that low.
A decent inverter/charger has a configuration low voltage disconnect.
I suggest you set it to 24 volts.
chrisski
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Any suggestions on brand and model?
I’m sure there’s plenty out there I missed, but i did not see a stand alone inverter in the 300 watt 2000 watt range or 3000 watt range that has that handy adjustable low voltage cutoff threshold feature. I had a 2000 watt Samlex, a 3000 watt Samlex, and 300 watt Victron, all good HF inverters, and none could be adjusted. I looked at others and did not find one.
John Frum
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I said inverter/charger but... inverters that support remote switching can also be used.
This one for example https://samlexamerica.com/products/2000-watt-pure-sine-wave-inverter-pst-2000-12/
You control it with one of these https://www.victronenergy.com/battery_protect/smart-battery-protect
For most use cases an inverter/charger makes more sense though.
Snubber
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Thanks
OffGridInTheCity
Solar Wizard
Some additional alternatives.....
I use AIMS pure sine wave inverters - this type of model with rocker switch and LCD Remote Port all work the same. Here's a pictorial of one I picked at random but the all the ones with an LCD remote port work the same.
My Midnite Classic has an AUX1 relay that can turn things on/off by battery voltage and I use that to turn my AIMS on/off thru wires #3 and #5 of an internet cable plugged into the LCD remote port. Wires 3-5 toggle regular mode and wires 5-7 toggle power saver mode.
*One could use any relay that is voltage aware to do the same thing.
Samlex Battery Guard is another alternative - its an on/off by voltage range you choose. They make these for 12/24v and for various amp levels up to 200a. They have 12 different voltage ranges and I'm sure you can find one that's suitable. https://www.toboaenergy.com/product/samlex-battery-guard-bg-60
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Snubber
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Great information. I'm new to all this. Thanks
Snubber
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I have ( 4 ) 12v FLA Deep Cycle RV batteries to start. Those are just what I have "on hand". Plan to go lithium at a later date. I've installed ( 3 ) 355w panels in series. I plan to use the SolarOne 60 Amp MPPT 150vdc Controller and the aeliussine 2000w 24v Inverter ( I like the front hard wire lugs & price ). I'm using 2awg cable with approximately 10' between the bank and inverter. That's what the fuse is for.
