How much usable energy does the battery bank give?

The bank is 25.6V at 100Ah, about 2,560Wh nominal. Lithium iron phosphate can be discharged deeply, so most of that is usable, unlike lead-acid where you should stop around half.

Can I run an air conditioner or space heater?

Not for long. A 2000W inverter can start some small loads, but heating and cooling appliances drain 2,560Wh in well under two hours. Plan on lights, a fridge, fans, electronics and short tool use.

Can I add more batteries later?

Yes, but you need batteries of the same chemistry, voltage and capacity, and the same age and condition ideally. Series strings must be matched, and the bank stays at 100Ah per string.

Can it charge in freezing weather?

No. Charging is rated from 0°C to 45°C, so below freezing the batteries must not be charged. Discharging works down to -20°C.

What maintenance do the batteries need?

Essentially none. There is no watering or equalizing as with flooded lead-acid. Keep the terminals clean and the batteries within their temperature range.

Is 24V better than a 12V system?

For a 2000W inverter, yes. At 24V the current is half what it would be at 12V, so cables and fuses can be smaller and losses lower. The catch is that 24V appliances and chargers are less common than 12V ones.

Where is the ROCKSOLAR 2000W 24V Off-Grid Solar System cheapest?

At Rocksolar Technology, for $1,999.99, as of our latest check.

ROCKSOLAR 2000W 24V Off-Grid Solar System

Best price now

$1,999.99at Rocksolar TechnologyChecked Nov 11

Prices are checked against each store and labelled with when.

Visit Rocksolar Technology

ROCKSOLAR 2000W 24V Off-Grid Solar System

Best price now

$1,999.99at Rocksolar TechnologyChecked Nov 11

Prices are checked against each store and labelled with when.

Visit Rocksolar Technology

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Price facts

Last seen at $1,999.99 at Rocksolar Technology on Nov 11.

Our take on the ROCKSOLAR 2000W 24V Off-Grid Solar System

A 24V off-grid solar kit built around two 12.8V 100Ah lithium batteries wired in series, giving a 25.6V bank with about 2,560Wh of nominal energy. The 2000W inverter class suits a cabin, shed, van or backup setup running lights, a fridge, fans, a laptop and small power tools. Lithium iron phosphate batteries are the draw here: they take a deeper discharge than lead-acid, need no maintenance and are rated for many more cycles, and the 10-year battery warranty backs that up. The trade-off is a fixed 24V bank, so adding capacity means matching batteries, and 2,560Wh is modest for anything with a heating element or a large air conditioner.

Best forCabin, shed and tiny-home powerVan and overlanding buildsBackup power for lights, fridge and electronicsFirst off-grid setup with lithium batteries

Pros

Lithium iron phosphate batteries: deeper discharge and longer cycle life than lead-acid
No maintenance, no watering, no acid fumes
Batteries work from -20°C to 60°C discharging and 0°C to 45°C charging
10-year battery warranty
24V bank keeps inverter wiring currents lower than a 12V setup

Cons

About 2,560Wh nominal is small for high-draw appliances
Series wiring keeps bank capacity at 100Ah, so expansion needs matching batteries
Charging is limited to above freezing, a problem for cold-weather sites
Kit size and weight make it a permanent or semi-permanent install

ROCKSOLAR 2000W 24V Off-Grid Solar System prices at every store

Rocksolar TechnologyNew
In stockSold by USA
$1,999.99Checked Nov 11
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ROCKSOLAR 2000W 24V Off-Grid Solar System price history

Lowest price we've seen: $1,999.99 on Nov 11 at Rocksolar Technology. Tracked across 1 store since Nov 11.

About the ROCKSOLAR 2000W 24V Off-Grid Solar System

The ROCKSOLAR 2000W 24V Off-Grid Solar System includes a battery bank made of two 12.8V, 100Ah batteries connected in series. The bank has a nominal voltage of 25.6V and a capacity of 100Ah. Connecting batteries in series raises the voltage but does not add amp-hour capacity.

Total nominal energy is 2560Wh, calculated as 2 x 12.8V x 100Ah. The batteries charge at temperatures from 0°C to 45°C and discharge at temperatures from -20°C to 60°C. The batteries carry a 10-year warranty.

System power: 2000W
System voltage: 24V
Battery capacity: 100Ah per battery
Battery voltage: 12.8V nominal (12V class) per battery
Bank voltage: 25.6V nominal
Bank capacity: 100Ah (series connection does not add Ah capacity)
Total energy: 2560Wh (2 x 12.8V x 100Ah)
Charge temperature: 0°C to 45°C
Discharge temperature: -20°C to 60°C
Battery warranty: 10 years

Specifications

Capacity Per Battery: 100Ah
Nominal Voltage Per Battery: 12.8V (12V class)
Bank Nominal Voltage: 25.6V
Bank Capacity: 100Ah (series connection does not add Ah capacity)
Total Nominal Energy: 2560Wh (2 x 12.8V x 100Ah)
Charge Temperature: 0°C to 45°C
Discharge Temperature: -20°C to 60°C
Battery Warranty: 10 years

Questions and answers

How much usable energy does the battery bank give?: The bank is 25.6V at 100Ah, about 2,560Wh nominal. Lithium iron phosphate can be discharged deeply, so most of that is usable, unlike lead-acid where you should stop around half.
Can I run an air conditioner or space heater?: Not for long. A 2000W inverter can start some small loads, but heating and cooling appliances drain 2,560Wh in well under two hours. Plan on lights, a fridge, fans, electronics and short tool use.
Can I add more batteries later?: Yes, but you need batteries of the same chemistry, voltage and capacity, and the same age and condition ideally. Series strings must be matched, and the bank stays at 100Ah per string.
Can it charge in freezing weather?: No. Charging is rated from 0°C to 45°C, so below freezing the batteries must not be charged. Discharging works down to -20°C.
What maintenance do the batteries need?: Essentially none. There is no watering or equalizing as with flooded lead-acid. Keep the terminals clean and the batteries within their temperature range.
Is 24V better than a 12V system?: For a 2000W inverter, yes. At 24V the current is half what it would be at 12V, so cables and fuses can be smaller and losses lower. The catch is that 24V appliances and chargers are less common than 12V ones.
Where is the ROCKSOLAR 2000W 24V Off-Grid Solar System cheapest?: At Rocksolar Technology, for $1,999.99, as of our latest check.