Solar & Battery Troubleshooter
Understand what your solar or battery indicators tell you, what they leave uncertain, and which existing information would help next.
Safety first: If you have already noticed smoke, fire, sparking, a burning smell, a battery that appears swollen or unusually hot, leaking electrolyte, electric shock, exposed damaged wiring or water entering electrical equipment, stop investigating and move away. Follow site emergency procedures and call local emergency services if danger is immediate. Do not approach equipment to check.
For stand-alone low-voltage battery systems in cabins, RVs and similar settings. “Low voltage” does not make an array, AC supply or stored fault energy harmless. This is a read-only evidence organizer, not a confirmed fault diagnosis, safety clearance or repair guide.
Interactive questions
The questions need JavaScript. The guidance and examples below remain available without it.
First recognize what a meter actually measures
Select the symptom, answer the mandatory safety screen, identify your installation context, then record what already accessible controller, BMS, inverter or energy-history displays report. Unknown is a legitimate answer. Do not take new live measurements, open equipment, change settings, operate switches, move conductors or repeat a shutdown for this tool.
The results distinguish reported indicators from possible explanations and information gaps. Alarm categories are recognized only when their meaning was explicitly displayed; arbitrary fault codes are not decoded. Product-specific manuals can define similar words differently. This does not authorize performing procedures described in a manual.
Solar output without net battery charging
Imagine an existing solar controller display reports positive output while a separate battery monitor indicates zero net charging at the same recorded moment. This can happen when loads consume the controller’s output, leaving no net energy flowing into the battery. That possibility does not establish the amount taken by each load, prove the solar array is healthy, or rule out a charging restriction.
When the display boundaries or observation times are unknown, even this limited simultaneous-flow interpretation is unsupported. The useful next information is the already visible screen labels and corresponding observation period, not an electrical test.
A 120 Wh illustration is not another 120 Wh of measured battery drain
An exact-model 12 W DC input no-load rating in normal mode applied to an expressly hypothetical 10 hours with no load in the same mode produces 12 W × 10 h = 120 Wh. This simple illustration assumes constant no-load power. Ten hours powered on with cycling appliances cannot silently be treated as ten no-load hours; a normal-mode rating cannot automatically describe ECO mode.
If a matching interval’s complete whole-battery gross-discharge meter already recorded 500 Wh, it includes the energy that meter captured leaving the battery. The illustrative 120 Wh is not added to the 500 Wh. An AC appliance meter, inverter DC input monitor and whole-battery monitor also measure different, possibly overlapping scopes; they cannot be combined into a new total without validated accounting.
Why a careful result sometimes says “not enough evidence”
Grid-connected/hybrid installations, integrated portable power stations and unknown system contexts receive a limited handoff rather than discrete-controller assumptions. Lead-acid or other battery chemistry cannot trigger LiFePO4 charge-protection interpretations. An unknown product model can still supply useful basic observations but never establishes its manufacturer-specific thresholds or error-code meanings.
Current-case print output preserves reported observations, their source, timing, uncertainty and supporting explanatory documents for a manufacturer, installer or qualified technician. Information is kept only in browser memory and cleared on reload. The optional JSON download is local; no accounts, uploaded logs, server storage or tracking are added. Builder and Winter below are illustrative planning aids, not confirmation of a real fault.
Source-backed concepts, not universal compatibility
The 24 interpretations cite a transparent source register using relevant Victron MPPT, LiFePO4, shunt and inverter manual sections as manufacturer-specific examples, plus OSHA/DOE electrical-hazard context. The constant-power illustration is authored dimensional arithmetic, not a product fault threshold. See the testing and modeling methodology.
Read the primary examples: SmartSolar troubleshooting, Lithium Battery Smart, SmartShunt operation, Inverter Smart operation, and OSHA solar electrical hazards. The exact edition and applicability of your own product manual must be confirmed independently.
Review status: Independent professional PV/battery safety and accuracy review has not been completed. This educational tool organizes existing observations; it does not diagnose equipment, confirm safety or authorize operation. Confirm applicability against your exact equipment manual and seek qualified support when needed.