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Battery email resource

Battery runtime worksheet

A free worksheet for listing daily loads, choosing a reserve target, estimating usable amp-hours, and checking how many 100Ah batteries the plan really implies.

What you get

A practical handoff from calculator result to next decision.

The file is intentionally lightweight. It gives you enough structure to move forward without pretending every rig uses the same parts.

Daily load worksheet

A simple table for listing watts, hours, duty cycle, and daily watt-hours before sizing the bank.

  • Appliance-by-appliance load rows
  • Daily watt-hour total
  • Reserve-day target

Usable capacity math

The worksheet separates nominal capacity from usable capacity so AGM and lithium comparisons are clearer.

  • Depth-of-discharge assumptions
  • 100Ah battery count
  • Reserve margin checks

Charging reality check

Runtime only matters if the system can recover, so the worksheet prompts charger, solar, and generator checks.

  • Solar recovery target
  • DC-DC or shore charger limits
  • Monitor, fuse, and cable questions

How to use it

Use the file after the math, not before it.

The worksheet works best when it captures a real calculator result and then slows down the buying decision just enough to catch fit, safety, and recovery assumptions.

1

List the daily loads

Start with watts, hours, and duty cycle for the appliances that actually run when you are off-grid.

2

Choose the reserve target

Decide whether the bank needs to cover one night, a cloudy day, or multiple days before recharge.

3

Check recovery before buying batteries

If charging cannot refill the bank, adding capacity only delays the same problem.

Good fit

You know the appliances you run but not how long the battery bank will last.

You are comparing AGM and lithium usable capacity.

You need to explain why one more battery may not solve a charging bottleneck.

LimitsWhat this resource does not replaceThe resource helps you plan. It does not replace current specs, manuals, code requirements, or installer judgment.
  • Brand-specific battery recommendations without current spec checks.
  • A replacement for battery manuals, BMS limits, or installer review.
  • A one-click answer when loads, reserve days, and recharge windows are still unknown.

Email follow-up

What the follow-up emails help with.

The download is useful by itself. After confirmation, the matching email path keeps the next few decisions tied to the same planning problem.

Email 1

Your RV battery runtime worksheet

Deliver the worksheet and show how to turn daily loads into usable amp-hour targets.

Email 2

Why usable capacity changes the answer

Explain lithium vs AGM sizing without making the battery count look simpler than it is.

Email 3

Runtime is only half the system

Connect battery size to recharge windows, charger limits, monitor/shunt choices, and protection.