In what order should I purchase equipment

TorC said:

Figure cloudy day with MPPT is still going to be 1/3 of your sunny day output

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TorC said:

With the generator you have, inverter and batteries are essential, and a good inverter will let you run your generator at peak efficiency when it runs. Then expand panels as you can. That will be your long-term outage power supply, and you can try to minimize generator use to stretch your propane supply.

Figure cloudy day with MPPT is still going to be 1/3 of your sunny day output - and for off-grid that's the number that matters more. If you've got AC, you probably care less about it on a cloudy day, which is a good thing.

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Bones1 said:

Open to more choices on inverters, what do you own?.

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RedNeckTek said:

LOL! Unless you live in the PNW, then you're screwed.

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TorC said:

Have a 24V system using a Samlex EVO 2224. It's been working, now I'm putting together a larger system that will have one Outback Radian 8kW and one Radian 4kW inverter. The 4kW should run most anything, and, given what I've been able to piece together of the design, no single failure should leave me with less than 8kW of inverter capacity. AIUI, the Radians use a control board and two 4kW power boards for the 8kW model, and I've seen reference to upgrading a 4kW to 8kW if you can source the power board.

One of the features the Radians (and some others) have is the ability to support an AC supply to maintain a steady load on the AC in supply and charging or drawing from the batteries to maintain your specified load, whether that's grid in or a generator.



I've seen days with well under a quarter the sun production potential. That'll suck down a battery fast.

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bones1 said:

If they only make them a little larger capacity.

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Samlex EVO-4248SP 4200W, 48V Split Phase Pure Sine Inverter/Charger | DonRowe.com

The Samlex America EVO-4248SP, 4200 Watt, 48 VDC, 120/240 VAC Split Phase Pure Sine Wave Inverter/Charger with 60 Amp Charger is a rugged inverter/charger designed for back up and off-grid applications

www.donrowe.com

Samlex EVO-4024 4000W, 24V Pure Sine Inverter/Charger | DonRowe.com

The Samlex America EVO-4024, 4000 Watt, 24 Volt Pure Sine Wave Inverter/Charger with 110 Amp Charger is a rugged inverter/charger designed for mobile and off-grid applications

www.donrowe.com

bones1 said:

8k with good surge headroom for my deep well and crawlspace sump pumps. I am concerned with the pumps and not any HVAC units. I have looked at the 4248 and like it.

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• 3X surge power for high surge loads on start-up, such as compressor or refrigerator
• Power overload allowances available for short periods of time. Overload allowances decrease with length of time. Increased inverter capacity, or “Active Power Boost,” means you can size your inverter smaller to handle heavy surge loads, reducing costs.
• This unit may be all I need.

bones1 said:

I just read this

• 3X surge power for high surge loads on start-up, such as compressor or refrigerator
• Power overload allowances available for short periods of time. Overload allowances decrease with length of time. Increased inverter capacity, or “Active Power Boost,” means you can size your inverter smaller to handle heavy surge loads, reducing costs.
• This unit may be all I need and a big plus it's UL listed..

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bones1 said:

Samlex looks like a quality unit. If they only make them a little larger capacity. Seems like we have to go with Growatt or MPP to get higher capacities

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Magnum MS4448PAE 4400W 48V Pure Sine Inverter/Charger | DonRowe.com

The Magnum Energy MS4448PAE, 4400 Watt, 48 Volt Pure Sine Wave Inverter/Charger with 60 Amp Charger provides 120 and 240 volts output in one unit, can be parallel stacked, is easy-to-use, and best of all, is cost effective

www.donrowe.com