The massive leap onward in battery innovation has seen an immense amount of passion in individuals looking to go off-grid, keep their solar power (self-use) and end up being power independent. Nonetheless, the quick pace of innovation has actually resulted in some confusion over what is attainable and which battery system is best suited to individual families.
Costs can also vary widely depending on the amount of energy storage capacity (measured in kWh) and type of inverter installed. Here we help explain some of the advantages of home battery systems, provide a price guide, present some alternative options and compare several of the leading battery systems.
Costs can also differ commonly depending on the quantity of energy storage capacity (determined in kWh) as well as sort of inverter mounted. Here we help discuss several of the advantages of residence battery systems, provide a price overview, offer some alternate options and compare several of the leading battery systems.
What is a battery ready system?
A battery ready system is similar to a typical grid-connected solar system but uses a hybrid inverter as opposed to a common solar inverter. Modern hybrid inverters have battery links and controls built-in, that makes including a battery a lot easier in the future.
The downside is ‘battery ready’ or hybrid inverters are typically 20-40% extra costly than a common solar inverter. An added trouble results from the fast evolution in battery modern technology, a compatible battery might be challenging to find after a few years time.
Yes, a battery can be included in any type of grid-connected solar system making use of an A/C coupled battery such as the Sonnen ECO and Tesla Powerwall 2. Retrofitting a battery can likewise be achieved utilizing a special sort of hybrid inverter created for AC coupling batteries. One such popular alternative is the SMA Sunny Boy Storage inverter which can be used to retrofit the prominent LG Chem battery. Soltaro and also Goodwe additionally supply A/C combined battery inverters.
If you need a high powered back-up system or require instantaneous back-up power (like a UPS system without a hold-up), the very best choice is an advanced multi-mode inverter like the Australian made Selectronic SP PRO or Victron Multiplus. These high powered inverters are developed to run in both on-grid and off-grid settings are and suitable with many of the leading battery systems.
A boosting variety of economical ‘hybrid’ solar inverters are now offered, including the Huawei SUN2000L, Sungrow SK5H-20 and Goodwe ES collection. However, the Huawei alternative has no backup and Sungrow as well as Goodwe have restricted backup power capacity.
Benefits of Home Battery Systems
- Lower cost – Save money by utilizing less energy from the grid
- Lower emissions – Lower pollution from coal/gas power generators
- Power outage secure – Have power readily available throughout a power outage or emergency situation
- Energy independent – Create, store and make use of your own power
Drawbacks of Home Battery Systems
- Higher upfront cost – Adds much more to the overall system cost
- Complexity – Needs a hybrid inverter as well as monitoring devices
- Location – Need to be set up in a secured free location out of the sun
Read our EZ Battery Reconditioning Guide review to learn how to recondition old batteries and bring them back to their fully function again.
How much does a home battery system cost?
The cost of home battery systems depends on the battery size or capacity, measured in kilowatt hours (kWh) and brand of solar or hybrid inverter used. Typical household batteries can cost anywhere from $4000 up to $12,000 depending on the capacity required, type of battery, installation location, backup power requirements and type of inverter used.
The cost of home battery systems depends upon the battery dimension or capacity, determined in kilowatt hrs (kWh) and brand name of solar or hybrid inverter utilized. Typical household batteries can cost anywhere from $4000 to $12,000 depending on the capability needed, type of battery, setup location, back-up power requirements as well as type of inverter used.
As a general guide, a battery system will cost between $800 to $1200 per kWh installed. For example, the Tesla Powerwall 2 with 13.2kWh of storage capacity will cost around $14,000 fully installed, while the 9.8kWh LG Chem RESU-H battery is closer to $9000, plus the extra cost of a compatible hybrid inverter and installation.
As a general overview, a battery system will cost in between $800 to $1200 per kWh set up. As an example, the Tesla Powerwall 2 with 13.2 kWh of storage capability will certainly cost around $14,000 completely set up, while the 9.8 kWh LG Chem RESU-H battery is closer to $9000, plus the extra expense of a compatible hybrid inverter and installation.
Do you really need a battery?
Unless you experience constant power outages the answer is typically no. For many people, the price of a battery system is just too expensive, yet this does not mean you can not benefit from roof solar.
For a lot of houses, rooftop solar can reduce your power costs by up to 60% or even more depending upon the quantity of energy you use throughout the day. For instance, it is feasible to run energy-intensive home appliances such as dish washers, air-conditioners and washing machines for free using your solar energy throughout the day.
In many states you will get credits for any excess electricity fed back to the grid. The feed-in credit score (FiT) rate is normally around $0.10 c per kWh. This is much lower than the cost of the electricity which is typically $0.30 c per kWh, hence why is it worth while utilizing your solar to run appliances or heat hot water.
The payback period or return on investment (ROI) for most battery systems is around 8-12 years. With this in mind it’s normally more affordable to set up roof solar and run reliable home appliance or heat hot water during the day instead of store excess power in a battery. Nonetheless, for some individuals the value and security of having a reliable, sustainable power supply easily exceeds the cost.
Smart home controls
Several modern solar inverters have built-in ‘demand’ or energy management controls. These can automatically activate home appliances when there is excess solar power, instead of sending it to the grid for little return. Furthermore, companies such as Solar Analytics make clever tracking tools which can be included in any kind of existing system to allow remote monitoring of both solar and energy usage.
There are a number of add-on devices offered to automatically heat hot water using excess solar power which is in effect using hot water as energy storage. Fronius have an add-on system called the ohmpilot, and SolarEdge also have a diverter, plus there are several popular retrofit systems from Catch Power, Powerdiverter, and also Paladin.
Hot water systems store energy but unlike batteries which use chemical reactions so store energy, hot water systems simply store energy as heat. If you have electric hot water then by adding a timer or solar power diverter you can reduce energy costs by up to 30% by using excess solar energy to heat your water during the day.
Hot water systems store energy but unlike batteries which make use of chemical reactions so store power, hot water systems merely store energy as heat. If you have electric warm water then by adding a timer or solar power diverter you can reduce power expenses by up to 30% by using excess solar energy to heat your water during the day.
The last point people need to worry about right now is a power blackout. Sadly, we are gearing up for wildfire and also typhoon periods and they might easily hit in the midst of this period. Today, the U.S. Forest Service is terminating prescribed burns across the West, potentially making the upcoming fire period even worse.
The economic climate is much less stable today than it was just a few weeks ago. Getting home solar can be the ideal choice for lots of people. They might pay much less per kilowatt-hour for clean, homegrown solar power than what they would otherwise when buying electricity from their energy company. Furthermore, people can use their home solar and battery systems to gain financial advantage through net metering.
With predictable, low rates for 25 years, home solar and batteries offers both economic and emotional peace of mind. Comparatively, energy rate frameworks are a lot less straightforward and reliable. What you are paying the utility today is likely not what you will be paying them next year.
Watch our video review of EZ Battery Reconditioning Guide to learn how to recondition old batteries and bring them back to their fully function again.
Our top pick home battery option
Home and RV 10kwh Solar Power System ALL in ONE Renewable Energy Storage Powerwall 10.24kwh LiFePo4 Lithium Battery with BMS include 5KW Hybrid Solar Power Inverter (LiFePO4, 10240Wh 5KW Powerwall)