Sizing a bank, series and parallel wiring, cables, fusing and balancing.
A battery is only as good as the system around it. This section is about turning a power requirement into a design: working out the daily energy you use, converting between watt-hours and amp-hours, choosing between a larger 12V bank and a 24V or 48V system, and deciding how many batteries that takes with a sensible margin.
The wiring guides explain series and parallel connections and what each does to voltage and capacity, the model-specific limits on how many Epoch batteries can be connected together, why batteries in series need to be balanced before they are joined and how a poor cable layout can make identical batteries share current unevenly. Cable gauge, fusing, bus bars and disconnects get the same practical treatment, because the protective parts of a system are the ones most often left out.
Read these before you order cables or a second battery. A bank designed on paper first is cheaper to build, easier to expand and far less likely to trip the management system in use.
Who this is for: For anyone planning a battery bank: how many batteries, at what voltage, wired how, protected by what, and with which cables.
The foundational reading for system design & wiring.
System Design & WiringUpdated 18 min read
Learn the difference between connecting batteries in series vs parallel - how each setup affects voltage, capacity, and performance for RV, marine, and solar power systems.
By Stephen Davenport
System Design & WiringPublished 7 min read
Learn how to estimate how many LiFePO4 batteries you need based on battery capacity, runtime, inverter size, system voltage, and your power usage.
By Stephen Davenport
System Design & WiringUpdated 2 min read
Linking 12-volt batteries in series provides a convenient method for constructing higher voltage battery systems, such as 24V, 36V, and 48V. It is advisable to balance the batteries in series, also referred to as voltage matching, by charging each battery individually prior to linking.
By Stephen Davenport
14 guides, newest first
System Design & WiringPublished 7 min read
Learn why LiFePO4 batteries connected in series can drift out of balance and how an active battery balancer helps reduce shutdowns and lost capacity.
By Stephen Davenport
System Design & WiringPublished 15 min read
Learn why LiFePO4 batteries connected in series can become unbalanced, how it affects charging and runtime, and why an active battery balancer matters.
By Stephen Davenport
System Design & WiringPublished 9 min read
Learn what to check before adding more LiFePO4 batteries later, including battery model, voltage, capacity, age, wiring, charger size, and parallel limits.
By Stephen Davenport
System Design & WiringPublished 7 min read
Learn how to estimate how many LiFePO4 batteries you need based on battery capacity, runtime, inverter size, system voltage, and your power usage.
By Stephen Davenport
System Design & WiringUpdated 12 min read
Learn how to choose the right inverter size for a LiFePO4 battery based on battery voltage, discharge current, surge loads, wiring, and battery bank size.
By Stephen Davenport
System Design & WiringPublished 8 min read
Learn what a Class T fuse is, why it matters for high-capacity lithium batteries, and how it helps protect LiFePO4 systems from dangerous fault currents.
By Stephen Davenport
System Design & WiringPublished 6 min read
Learn what happens when electrical demand exceeds supply, including voltage sag, overload protection, heat buildup, and how LiFePO4 batteries support reliable power systems.
By Stephen Davenport
System Design & WiringPublished 4 min read
Learn how load matching improves LiFePO4 battery performance, efficiency, and lifespan. Explore real-world applications across EVs, home energy systems, and AC loads.
By Stephen Davenport
System Design & WiringPublished 4 min read
Learn what causes runtime variability in LiFePO4 lithium battery systems, including load profiles, temperature effects, and BMS behavior. Discover how to optimize battery performance for consistent energy delivery.
By Stephen Davenport
System Design & WiringPublished 3 min read
Discover what happens when battery systems are undersized, including voltage sag, thermal stress, and reduced lifespan. Learn how proper LiFePO4 sizing improves performance and reliability.
By Stephen Davenport
System Design & WiringPublished 5 min read
Discover how parallel connections impact LiFePO4 battery performance, including capacity scaling, current distribution, and system efficiency. Learn best practices for safe, high performance parallel battery configurations.
By Stephen Davenport
System Design & WiringPublished 3 min read
Learn how wiring layout affects LiFePO4 battery performance, efficiency, heat generation, and lifespan, and why proper electrical design is critical for modern energy systems.
By Stephen Davenport
System Design & WiringUpdated 18 min read
Learn the difference between connecting batteries in series vs parallel - how each setup affects voltage, capacity, and performance for RV, marine, and solar power systems.
By Stephen Davenport
System Design & WiringUpdated 2 min read
Linking 12-volt batteries in series provides a convenient method for constructing higher voltage battery systems, such as 24V, 36V, and 48V. It is advisable to balance the batteries in series, also referred to as voltage matching, by charging each battery individually prior to linking.
By Stephen Davenport
The rest of the guides, by topic.